The Android app SafetyCore was silently installed and looks at incoming and outgoing pictures to check their decency.

Sometimes the updates we install to keep our devices safe do a little bit more than we might suspect at first glance. Take the October 2024 Android Security Bulletin.

It included a new service called Android System SafetyCore. If you can find a mention of that in the security bulletin, you’re a better reader then I am. It wasn’t until a few weeks later, when a Google security blog titled 5 new protections on Google Messages to help keep you safe revealed that one of the new protections was designed to introduce Sensitive Content Warnings for Google Messages.

Sensitive Content Warnings is an optional feature that blurs images that may contain nudity before viewing, and when an image that may contain nudity is about to be sent or forwarded, it will remind users of the risks of sending nude imagery and preventing accidental shares.

**Wait! What?**

Yes, there is now a service on my phone that checks whether your pictures are “decent enough” to send or share? I’m not oblivious to the many users that would be better off with such a service, but I’m not so sure they’d appreciate it.

However, what really concerned me is the fact that Google is looking at my incoming and outgoing pictures. I use end-to-end-encrypted (E2EE) messaging for a reason. The content is for me and the receiver, and no-one else, and that definitely includes Google.

But, again, no mention of SafetyCore in that blog or what will provide the Sensitive Content Warnings feature with the necessary data.

So, you can imagine the surprise and outrage when users found this service which doesn’t show up on the regular list of running applications that has permissions to do almost anything on the device.

And by looking up what this app called SafetyCore was all about, all of the above starts to make sense.

Google PlayStore says:

> “SafetyCore is a Google system service for Android 9+ devices. It provides the underlying technology for features like the upcoming Sensitive Content Warnings feature in Google Messages that helps users protect themselves when receiving potentially unwanted content. While SafetyCore started rolling out last year, the Sensitive Content Warnings feature in Google Messages is a separate, optional feature and will begin its gradual rollout in 2025. The processing for the Sensitive Content Warnings feature is done on-device and all of the images or specific results and warnings are private to the user.”

Google goes on to reassure:

*   The developer says that this app doesn’t collect or share any user data. 
*   The developer says that this app doesn’t share user data with other companies or organizations. 
*   The developer says that this app doesn’t collect user data.
*   The developer has committed to follow the Play Families policy for this app. 

Google promises that it only rates our pictures and does not collect or share them, but this feature has almost Artificial Intelligence (AI) written all over it. As we all know, an AI needs to be trained, and training an AI locally on your phone is hardly an option. I wish it had the necessary power, but it doesn’t.

I for one don’t see how the secretly installed service measures up to what the feature has to offer. But obviously everyone is entitled to their own opinion and the device is yours to do with as you please.

**How to uninstall or disable SafetyCore**

The good people at ZDNet provided instructions on how to get rid of SafetyCore or disable it if you would like to do so.

So, if you wish to uninstall or disable SafetyCore, take these steps:

1.  **Open Settings**: Go to your device’s Settings app
2.  **Access Apps**: Tap on ‘Apps’ or ‘Apps & Notifications’
3.  **Show System Apps**: Select ‘See all apps’ and then tap on the three-dot menu in the top-right corner to choose ‘Show system apps’
4.  **Locate SafetyCore**: Scroll through the list or search for ‘SafetyCore’ to find the app
5.  **Uninstall or Disable**: Tap on Android System SafetyCore, then select ‘Uninstall’ if available. If the uninstall option is grayed out, you may only be able to disable it
6.  **Manage Permissions**: If you choose not to uninstall the service, you can also check and try to revoke any SafetyCore permissions, especially internet access

Note: depending on the software version and manufacturer of your device, these instructions may be slightly off. I personally couldn’t test them because my Samsung has not received the October patch yet due to the patch gaps.

If you’d like to learn more about AI and encrypted messaging, we recommend listening to our podcast The new rules for AI and encrypted messaging, with Mallory Knodel (Lock and Code S06E01)

**We don’t just report on phone security—we provide it**

Cybersecurity risks should never spread beyond a headline. Keep threats off your mobile devices by downloading Malwarebytes for iOS, and Malwarebytes for Android today.

 Android happy to check your nudes before you forward them 

Cybersecurity threats in crypto are rising, from the Bybit hack to fake wallets stealing funds. Learn how to…

Cybersecurity threats in crypto are rising, from the Bybit hack to fake wallets stealing funds. Learn how to protect your assets with secure wallets and best practices.

Cryptocurrency has revolutionized finance forever, but it has also exposed users to cybercriminals and scams. From large-scale exchange breaches to malicious wallets sneaking into app stores, the risks are growing. If you’re in crypto, securing your assets is no longer optional; it’s a necessity.

****The Bybit Hack: A Wake-Up Call****

Just recently, Bybit, one of the world’s largest cryptocurrency exchanges, suffered a massive security breach. Hackers from the North Korean Lazarus Group managed to steal $1.4 billion in assets, once again proving that even well-established platforms are vulnerable. While Bybit has since taken action to reinforce security, this incident clearly shows why leaving funds on exchanges is a risk.

But, it’s not just ByBit. No exchange is “unhackable”. Even giants like Binance, KuCoin, and Mt. Gox have suffered devastating hacks in the past. These breaches highlight the importance of self-custody; if you don’t control your private keys, you don’t fully own your crypto.

****Malicious Wallets: A Silent but Growing Threat****

While exchange hacks grab headlines, a more stealthy and growing problem is the rise of fake and malicious crypto wallets on iOS and Google Play Store. These malicious apps pose as legitimate wallets but are designed to steal funds the moment users deposit their assets.

Researchers have found a surge in these fraudulent wallets, often disguised as clones of popular apps. They look identical to trusted wallets like MetaMask, Trust Wallet, or Coinbase Wallet, tricking unsuspecting users into transferring their funds straight to hackers.

This issue isn’t just limited to scam wallets, even some browser extensions and fake dApps have been caught injecting malicious scripts to drain wallets. The takeaway? Never download a crypto wallet without verifying its authenticity through the official website or developer page.

****A Booming Crypto Market Means More Targets for Hackers****

According to researchers at Best Wallet, a popular crypto wallet, as of January 2025, approximately 562 million people worldwide own cryptocurrencies, with 28% of adults in the United States, equating to 65 million people, holding crypto.

With such rapid adoption, hackers have more targets than ever. From phishing scams to SIM swap attacks, crypto theft is at an all-time high. If you own crypto, taking cybersecurity seriously is no longer an option, it’s a must.

****How to Protect Your Crypto From Hacks & Scams****

Securing your cryptocurrency is essential in an era of increasing cyber threats. Here are some must-follow security tips to protect your digital assets from hacks and scams.

****1\. Use a Reliable Crypto Wallet****

One of the safest ways to store your crypto is by using a self-custodial wallet. Avoid keeping funds on exchanges, as they are frequent targets for hackers. Instead, opt for hardware wallets like Ledger, Trezor, or Coldcard, which provide offline storage and enhanced security.

If you prefer a mobile or desktop wallet, stick to reputable providers such as MetaMask, Trust Wallet, or Exodus. However, before downloading any wallet, always verify the source; ensure it’s from the official website or developer page to avoid fake apps.

****2\. Enable Multi-Factor Authentication (MFA)****

Adding an extra layer of security with Multi-Factor Authentication (MFA) can protect your exchange and wallet accounts. Use Google Authenticator, YubiKey, or similar tools to prevent unauthorized access.

Avoid using SMS-based 2FA, as it’s vulnerable to SIM swap attacks, where hackers hijack your phone number to gain control of your accounts.

****3\. Beware of Phishing Attacks****

Phishing remains one of the most common tactics used by cybercriminals. Hackers often impersonate wallet providers or exchanges, tricking users into entering their credentials on fake websites or downloading malware-infected software.

To stay safe, always type the official website URL yourself instead of clicking on links sent via email or messages. If an offer or security alert seems suspicious, double-check with the official source before taking any action.

****4\. Keep Private Keys & Seed Phrases Offline****

Your private keys and seed phrases are the most critical elements of your crypto security. Never store them digitally or on cloud storage, as they can be easily compromised. Instead, write them down on paper and keep them in a secure location.

For even greater security, consider using metal backup storage instead of paper. This protects your seed phrase from damage due to fire, water, or physical deterioration.

****5\. Regularly Update Your Security Software****

Keeping your wallet software, antivirus, and operating system updated is crucial for patching security vulnerabilities. Cybercriminals exploit outdated software to gain access to systems, so regular updates help keep your assets safe.

Additionally, consider using privacy tools like VPNs and hardware firewalls to enhance your online security. These tools help protect against tracking, phishing attempts, and potential malware attacks targeting crypto users.

The Bybit hack and the rise of malicious crypto wallets show that crypto security is more critical than ever. If you own crypto, you’re a target, but with the right precautions, you can keep your funds safe.

Remember: Not your keys, not your crypto. Invest in a secure, reliable wallet, stay cautious with online downloads, and always double-check security measures before making transactions.

_**Editor’s Note:** This article is for informational purposes only and does not constitute investment or financial advice. Always do your own research before making financial decisions._

Crypto and Cybersecurity: The Rising Threats and Why Reliable Wallets Matter

The stolen information included listed contacts, call logs, text messages, photos, and the device’s location.

A malicious app claiming to be a financial management tool has been downloaded 100,000 times from the Google Play Store. The app— known as “Finance Simplified”—belongs to the SpyLoan family which specializes in predatory lending.

Sometimes malware creators manage to get their apps listed in the official app store. This is a great benefit for them since it lends a sense of legitimacy to the app, and they don’t have to convince users to sideload the app from an unofficial site.

So, it gives them a much larger audience, they can lean on the trust we invest in the official app stores and users don’t have to do anything they might perceive as suspicious.

While Google has enhanced security measures in place—including AI-powered threat detection and real-time scanning— that are designed to detect and block malicious apps more effectively, the cat-and-mouse game between cybercriminals and security measures continues, with each side trying to outsmart the other.

In this case, the loan app evaded detection on Google Play, by loading a WebView to redirect users to an external website from where they could download the app hosted on an Amazon EC2 server.

Predatory lending is any lending practice where the borrower is taken advantage of by the lender. Predatory lenders impose lending terms that are unfair or abusive.

The apps in the SpyLoan family offer attractive loan terms with virtually no background checks. But when the apps are installed, they steal information from the victim’s device that can be used to blackmail the victim. Especially when they miss any payments on the loan.

Among the stolen information are listed contacts, call logs, text messages, photos, and the device’s location.

Although the app has now been removed from Google Play, it may continue to run on affected devices, collecting sensitive information in the background.

The researchers found that the app only targets users in India with the recommended loan applications and the redirect to an external website.

The information stolen from users could well be used for malicious purposes or sold to other cybercriminals.

Losing data related to a financial account can have severe consequences. If you find an app from this family or another information stealer on your device, there are a few guidelines to follow to limit the damage:

*   **Change your password.** You can make a stolen password useless to thieves by changing it. Choose a strong password that you don’t use for anything else. Better yet, let a password manager choose one for you.
*   **Enable two-factor authentication (2FA).** If you can, use a FIDO2-compliant hardware key, laptop or phone as your second factor. Some forms of two-factor authentication (2FA) can be phished just as easily as a password. 2FA that relies on a FIDO2 device can’t be phished.
*   **Consider not storing your card details**. It’s definitely more convenient to get sites to remember your card details for you, but we highly recommend not storing that information on websites.
*   **Set up identity monitoring.** Identity monitoring alerts you if your personal information is found being traded illegally online, and helps you recover after.

**We don’t just report on phone security—we provide it**

Cybersecurity risks should never spread beyond a headline. Keep threats off your mobile devices by downloading Malwarebytes for iOS, and Malwarebytes for Android today.

 Predatory app downloaded 100,000 times from Google Play Store steals data, uses it for blackmail 

A new information-stealing malware, ACRStealer, is leveraging legitimate platforms like Google Docs and Steam to carry out its…

A new information-stealing malware, ACRStealer, is leveraging legitimate platforms like Google Docs and Steam to carry out its attacks, according to research from the AhnLab Security Intelligence Center (ASEC). This malware, which initially appeared in mid-2024 as a beta version, has seen a significant increase in distribution since 2025, with February’s volume mirroring January’s and indicating a potential surge.

It is worth noting that, according to Hudson Rock’s report, infostealers have become the biggest threat to critical infrastructure. The report reveals that computers belonging to the US Army, Navy, and even the FBI have been compromised, with stolen data available on the dark web for as little as $10.

In the ongoing campaign, ASEC’s monitoring confirms that ACRStealer is spread through software cracks and key generators, commonly used for software piracy, and the malware is frequently disguised as these illegal programs. 

While Lumma Stealer and Vidar have been dominant infostealers distributed this way, researchers observed that ACRStealer’s presence is growing rapidly. According to their report, the distribution trend of ACRStealer from June 2024 to February 2025 indicates a dramatic rise in 2025.

Platforms used to distribute the infostealer disguised as a crack (Screenshot via AhnLab).

ACRStealer boasts a range of malicious capabilities. It can detect installed antivirus solutions, steal cryptocurrency wallets and login credentials, extract browser data, harvest FTP credentials, and read all text files. This stolen information allows cybercriminals to target financial assets and personal accounts. Stolen credentials grant access to email, social media, and banking services. This data can also be used for identity theft or sold on dark web markets.

A key feature is ACRStealer’s C2 server communication. Instead of embedding the server’s IP, it uses a Dead Drop Resolver (DDR). This method involves the malware contacting a legitimate service, such as Google Docs or Steam, to retrieve the C2 server’s domain. ASEC has identified several platforms used as intermediary C2s, including Steam, telegra.ph, and various forms of Google Docs (Forms and Presentations).

This approach allows attackers to easily change the C2 domain if it is compromised without needing to update the malware itself. They simply modify the information within the intermediary C2. 

The actual C2 domain, retrieved from the intermediary C2, is combined with a hardcoded UUID (Universally Unique Identifier) to create the URL for downloading encrypted configuration data. This data contains crucial information like target programs, additional malware URLs, file extensions, and target extension IDs.

The configuration file specifies a wide range of data to be stolen, including browser data, text files, cryptocurrency wallets, FTP information, chat program information, email client information, remote program information, terminal program information, VPN information, password manager information, database (DB) information, and browser extension plugin information. 

Also, it targets numerous programs, from browsers like Chrome and Firefox to cryptocurrency wallets like Binance and Electrum, chat programs like Telegram and Signal, and various browser plugins. Collected files are often compressed before transmission.   

AhnLab’s research highlights ACRStealer’s adaptable approach, constantly changing platforms and the locations of C2 information within them. It operates as Malware-as-a-Service (MaaS), making infection tracking difficult. 

However, preventative measures can be taken. This involves avoiding websites distributing cracks and key generators, and downloading software only from official sources. Additionally, be cautious with links and attachments in unsolicited communications, enable multi-factor authentication (MFA) for added security, and maintain an active anti-malware solution.

Hackers Use Google Docs and Steam to Spread ACRStealer Infostealer

Google Cloud has announced quantum-safe digital signatures in Google Cloud Key Management Service (Cloud KMS) for software-based keys as a way to bulletproof encryption systems against the threat posed by cryptographically-relevant quantum computers.
The feature, currently in preview, coexists with the National Institute of Standards and Technology's (NIST) post-quantum cryptography (PQC)

Google Cloud KMS Adds Quantum-Safe Digital Signatures to Defend Against Future Threats

A list of topics we covered in the week of February 17 to February 23 of 2025

February 21, 2025 - Healthcare security is failing patients time and again. This week DM Clinical Research and Helath Net Federal Services take the spotlight

February 20, 2025 - Beware before downloading Google Chrome from a Google search, you might get more than you expected.

February 20, 2025 - An infostealer known as ACRStealer is using legitimate platforms like Google Docs and Steam as part of an attack.

February 20, 2025 - South Korea says it's uncovered evidence that DeepSeek has secretly been sharing data with ByteDance, the parent company of popular social media app TikTok.

February 19, 2025 - Malwarebytes now protects ARM-based Windows devices, such as Microsoft’s Surface Pro X and Lenovo’s Yoga laptops.

 A week in security (February 17 &#8211; February 23) 

Plus: Apple turns off end-to-end encrypted iCloud backups in the UK after pressure to install a backdoor, and two spyware apps expose victim data—and the identities of people who installed the apps.

As the so-called Department of Government Efficiency continues to rampage through the United States government by making sweeping cuts to the federal workforce, numerous ongoing lawsuits allege that the group’s access to sensitive data violates the Watergate-inspired Privacy Act of 1974 and that it needs to halt its activity. Meanwhile, DOGE cut staff this week at the Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency and gained access to CISA’s digital systems after the agency had already frozen its eight-year-old election security initiatives late last week.

The National Institute of Standards and Technology was also bracing this week for roughly 500 staffers to be fired, which could have serious impacts on NIST’s cybersecurity standards and software vulnerability tracking work. And cuts last week at the US Digital Service included the cybersecurity lead for the central Veterans Affairs portal, VA.gov, potentially leaving VA systems and data more vulnerable without someone in his role.

Multiple US government departments are now considering bans on China-made TP-Link routers following recent aggressive Chinese digital espionage campaigns. (The company denies any connection to cyberattacks.) A WIRED investigation found that users of Google’s ad tech can target categories that shouldn’t be available under the company’s policies, including people with chronic diseases or those in debt. Advertisers could also target national security “decision makers” and people involved in the development of classified defense technology.

Google researchers warned this week that hackers tied to Russia have been tricking Ukrainian soldiers with fake QR codes for Signal group invites that exploited a flaw to allow the attackers to spy on target messages. Signal has rolled out updates to stop exploitation. And a WIRED deep dive examines how difficult it can be for even the most connected web users to have nonconsensual intimate images and videos of themselves removed from the web.

And there's more. Each week, we round up the security and privacy news we didn’t cover in depth ourselves. Click the headlines to read the full stories. And stay safe out there.

Running a cryptocurrency exchange is a risky business, as hacking victims like Mt. Gox, Bitfinex, FTX, and plenty of others can attest. But never before has a platform for buying and selling crypto lost a 10-figure dollar sum in a single heist. That new record belongs to ByBit, which on Friday revealed that thieves hacked its Ethereum-based holdings. The hackers made off with a sum that totals to $1.4 billion, according to an estimate by cryptocurrency tracing firm Elliptic—the largest crypto theft of all time by some measures.

ByBit CEO Ben Zhou wrote on X that the hackers had used a “musked transaction”—likely a misspelling of “masked transaction”—to trick the exchange into cryptographically signing a change in the code of the smart contract controlling a wallet holding its stockpile of Ethereum. “Please rest assured that all other cold wallets are secure,” Zhou wrote, suggesting that the exchange remained solvent. “All withdraws are NORMAL.” Zhou later added in another note on X that the exchange would be able to cover the loss, which if true suggests that no users will lose their funds.

The theft dwarfs other historic hacks of crypto exchanges like Mt. Gox and FTX, each of which lost sums of cryptocurrency that were worth hundreds of millions of dollars at the time the thefts were discovered. Even the stolen loot from the 2016 Bitfinex heist, which was worth close to $4.5 billion at the time the thieves were identified and the majority of the funds recovered in 2022, was only worth $72 million at the time of the theft. ByBit’s $1.4 billion is by that measure a far bigger loss and, considering that all crypto thefts in 2024 totaled to $2.2 billion, according to blockchain analysis firm Chainalysis, a stunning new benchmark in crypto crime.

**Bowing to a Government Demand, Apple Disables iCloud End-to-End Encryption in the UK**

The British government earlier this month raised privacy alarms worldwide when it demanded that Apple give it access to users’ end-to-end encrypted iCloud data. That data had been protected with Apple’s Advanced Data Protection feature, which encrypts stored user information such that no one other than the user can decrypt it—not even Apple. Now Apple has caved to the UK’s pressure, disabling that end-to-end encryption feature for iCloud across the country. Even as it turned off that protection, Apple expressed its reluctance in a statement: "Enhancing the security of cloud storage with end-to-end-encryption is more urgent than ever before," the company said. "Apple remains committed to offering our users the highest level of security for their personal data and are hopeful that we will be able to do so in future in the UK." Privacy advocates worldwide have argued that the move—and the UK’s push for it—will weaken the security and privacy of British citizens and leave tech companies vulnerable to similar surveillance demands from other governments around the world.

**Cocospy and Spyic Stalkerware Apps Expose Millions of Victims’ Data Online**

The only thing worse than the scourge of stalkerware apps—malware installed on phones by snooping spouses or other hands-on spies to surveil virtually all of the victim’s movements and communications—is when those apps are so badly secured that they also leak victims’ information onto the internet. Stalkerware apps Cocospy and Spyic, which appear to have been developed by someone in China and largely share the same source code, left data stolen from millions of victims exposed, thanks to a security vulnerability in both apps, according to a security researcher who discovered the flaw and shared information about it with TechCrunch. The exposed data included messages, call logs, and photos, TechCrunch found. In a karmic twist, it also included millions of email addresses of the stalkerware’s registered users, who had themselves installed the apps to spy on victims.

$1.4 Billion Stolen From ByBit in Biggest Crypto Theft Ever

Beware before downloading Google Chrome from a Google search, you might get more than you expected.

Criminals are once again abusing Google Ads to trick users into downloading malware. Ironically, this time the bait is a malicious ad for Google Chrome, the world’s most popular browser.

Victims who click the ad land on a fraudulent Google Sites page designed as a intermediary portal, similar to what we saw earlier this year with the massive Google accounts phishing campaign.

The final redirect eventually downloads a large executable disguised as Google Chrome which does install the aforementioned but also surreptitiously drops a malware payload known as SecTopRAT.

We have reported this incident to Google, but at the time of writing the fake Google Sites page is still up and running.

We identified a suspicious ad when searching for “_download google chrome_“. If you look at the URL embedded in the sponsored result, you will notice it shows “_https://sites.google.com_“, which is Google’s free website builder.

While most pages hosted on there are legitimate, it’s good to remember that they are user generated and that abuse is a part of any open platform. It’s also a way for criminals to cleverly appear as legitimate when building fake ads.

**Malware payload**

Once a user double clicks on _GoogleChrome.exe_ the fake Chrome installer connects to _hxxps\[://\]launchapps\[.\]site/getCode\[.\]php_ and retrieves the necessary instructions. Below, we can see how it requests to run as administrator in order to perform certain actions that require this access level.

A PowerShell command adds an exclusion path to the %appdata%\\Roaming directory so that Windows Defender does not trigger when the malware payload is extracted.

An encrypted data stream is downloaded from _hxxps\[://\]launchapps\[.\]site/3\[.\]php?uuid={}\_uuid_ and then decrypted:

The executable named _decrypted.exe_ (PDB path: _D:\\a\\wix4\\wix4\\build\\burn\\Release\\x64\\burn.pdb_) is then dropped to %\\AppData%\\Roaming\\BackupWin\\ and unpacks the final payload, _waterfox.exe_. Side note: it has the same name and icon as the Waterfox browser (an open-source fork of the Firefox web browser).

The malicious code is then injected into the legitimate _MSBuild.exe_ process which communicates with the attackers’ command and control infrastructure at the following IP: 45.141.84\[.\]208. From this, we identify the malware payload as SecTopRAT, a remote access Trojan with stealer capabilities.

Lastly, to make sure victims are completely fooled, it finishes by downloading and installing the legitimate Chrome browser. From the installation script, we see other campaigns the same threat actors are running in parallel for fake Notion and Grammarly installers.

**Conclusion**

Downloading and installing software provides an opportunity for threat actors as long as they are able to compromise the delivery chain. Search ads provide that entry point by leveraging the trust users have in their search engine. It is somewhat ironic but also damning when malicious ads impersonate the same platform that allows them in the first place.

The fake Chrome installer we reviewed in this blog post cleverly retrieved its malicious payload dynamically from a remote site and only decrypted it after making sure Windows Defender would not be able to scan it. The ruse was complete when the actual legitimate Google Chrome installer was downloaded and installed.

Malwarebytes users were already protected from this attack, with Browser Guard blocking the malicious ad and Premium Security Antivirus detecting the dropped payload.

**We don’t just report on threats—we remove them**

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.

**Indicators of Compromise**

Google Sites

sites\[.\]google\[.\]com/view/gfbtechd/

Fake Chrome download

chrome\[.\]browser\[.\]com\[.\]de  
chrome\[.\]browser\[.\]com\[.\]de/GoogleChrome.exe  
48fdfbe23eef7eddff071d3eda1bc654b94cf86036ca1cca9c73b0175e168a55

Payload host

launchapps\[.\]site

decrypted.exe

f0977c293f94492921452921181d79e8790f34939429924063e77e120ebd23d7

waterfox.exe

0f9b2870c4be5ebacb936000ff41f8075ec88d6535161a93df8e6cfea2d8db54

C2

45.141.84\[.\]208

 SecTopRAT bundled in Chrome installer distributed via Google Ads 

An infostealer known as ACRStealer is using legitimate platforms like Google Docs and Steam as part of an attack.

An infostealer known as ACRStealer is using legitimate platforms like Google Docs and Steam as part of an attack, according to researchers.

ACRStealer is often distributed via the tried and tested method of download as cracks and keygens, which are used in software piracy. The infostealer has been around since mid-2024 (as a beta test), but it’s only really taken off in 2025. ACRStealer is capable of:

*   Identifying which antivirus solution is on a device
*   Stealing crypto wallets and login credentials
*   Stealing browser information
*   Harvesting File Transfer Protocol (FTP) credentials
*   Reading all text files

With that kind of information, cybercriminals can go after your cryptocurrency and other funds. With the capture of usernames and passwords from web browsers, attackers can access your accounts, including email, social media, and financial services.

They may even gather enough personal data to be used for identity theft or sold on the dark web.

What stands out in the recently-found ACRStealer variants is the way they communicate with the command and control (C2) server—a computer which is used to send commands to systems compromised by malware and receive stolen data from a target network. Rather than hard-coding the IP address in the malware, they chose to use a method called Dead Drop Resolver (DDR), where the malware contacts a legitimate platform like Google Docs or Steam to read what the C2 domain is.

This is good for the cybercriminals as it means they can easily change the domain if one gets discontinued, seized, or blocked. All they need to do is update the Google Doc.

And outgoing calls to docs.google.com will not easily trigger an alarm, so it helps in staying under the radar.

**Stay safe from the ACRStealer**

Like many other information stealers, ARCStealer is operated under the Malware-as-a-Service (MaaS) model, where criminals rent out the malware and the infrastructure to other criminals. That makes it hard to know exactly how to defend yourself.

However, there are some things you can do:

*   Stay away from websites offering cracks and keygens
*   Download software from the official publisher wherever possible
*   Don’t click on links in unsolicited communications (email, texts, DMs, etc)
*   Don’t open unverified attachments
*   Use multi-factor authentication (MFA) wherever you can, so even if cybercriminals steal your login details they won’t be able to get into your account
*   Use an active and up-to-date anti-malware solution.

Malwarebytes recognizes new variants of ACRStealer by behavior, which will result in the detection name of Malware.AI.{ID-number}.

**We don’t just report on threats—we remove them**

Cybersecurity risks should never spread beyond a headline. Keep threats off your devices by downloading Malwarebytes today.

 Google Docs used by infostealer ACRStealer as part of attack 

Google enables marketers to target people with serious illnesses and crushing debt—against its policies—as well as the makers of classified defense technology, a WIRED investigation has found.

A WIRED investigation into the inner workings of Google’s advertising ecosystem reveals that a wealth of sensitive information on Americans is being openly served up to some of the world’s largest brands despite the company’s own rules against it. Experts say that when combined with other data, this information could be used to identify and target specific individuals.

Display & Video 360 (DV360), one of the dominant marketing platforms offered by the search giant, is offering companies globally the option of targeting devices in the United States based on lists of internet users believed to suffer from chronic illnesses and financial distress, among other categories of personal data that are ostensibly banned under Google’s public policies.

Other lists of American users accessible for a price across the platform raise serious national security concerns, experts say, as they reveal data brokers striving to isolate millions of mobile devices carried by government workers—from US judges and military service members to executive agency staff and employees on Capitol Hill.

First reviewed by WIRED, an internal spreadsheet obtained from a US-based data broker shows the DV360 platform currently hosting hundreds if not thousands of restricted or otherwise sensitive “audience segments,” each containing a large tranche of data that points to countless mobile devices and online profiles of people in the US. The segments are generated not by Google, but by DV360 customers who upload them to the system, where others can use them to target ads at specific audiences.

The data—first obtained by the Irish Council for Civil Liberties (ICCL), Ireland's oldest independent human rights body—reveals segments targeting hundreds of millions of device users based exclusively on health conditions, from chronic pain and menopause to, among others, fibromyalgia, psoriasis, arthritis, high cholesterol, and hypertension.

“As with other demand-side platforms, advertisers are able to upload audience lists to Display & Video 360, based either on their own first-party data or from segment providers,” says Erica Walsh, a Google spokesperson. “Our policies do not permit audience segments to be used based on sensitive information like employment, health conditions, financial status, etc.”

Despite this, numerous segments contained in the data are clearly targeted at households and businesses based purely on data suggesting they’re experiencing financial hardship—aiming, for instance, to help advertisers identify people who are in the process of bankruptcy or burdened by long-term debt.

Allison Bodack, another Google spokesperson, tells WIRED that when the company detects “non-compliant audience segments, we will take action.” Asked to explain why Google had not detected segments with descriptions such as “Individuals likely to have a Cardiovascular condition,” or “Parents of children likely to have a respiratory disease, like Asthma,” Bodack did not respond.

Segments accessible through DV360 that target Americans with asthma contain at least hundreds of millions of mobile IDs—among them, a list simply titled, “People who have asthma.” Hundreds of millions more were found on lists for no other reason than the fact that their users are believed to have diabetes. A vast number of devices and user profiles are spread out across lists that target users determined likely to need specific medications, including some controlled substances, such as Ambien. One list links more than 140 million mobile IDs to opioid usage, suggesting the users need relief from a common "opioid-induced" side effect.

Google did not respond when asked whether a data broker had violated its rules by offering advertisers access to a list of people “likely to have an Endocrine disorder.” (The company only stated that its policies “do not permit” such segments “to be used.”) Asked to explain whether it assigns any level of risk to audience segments that target US government employees working in national security jobs, or contractors with access to restricted US defense-related technologies, Google’s spokespeople did not respond.

Among a list of 33,000 audience segments obtained by the ICCL, WIRED identified several that aimed to identify people working sensitive government jobs. One, for instance, targets US government employees who are considered “decision makers” working “specifically in the field of national security.” Another targets individuals who work at companies registered with the State Department to manufacture and export defense-related technologies, from missiles and space launch vehicles to cryptographic systems that house classified military and intelligence data.

Sources with firsthand knowledge of Google’s platform, granted condition of anonymity to protect against retaliation on the job, confirmed the segments were actually accessible to Google’s ad buyers. Unlike Google Ads, which is free and typically used by individuals and small businesses, DV360 is a paid platform primarily aimed at companies that spend over $50,000 in ad buys per month. Google’s DV360 partners include the likes of Disney and NBCUniversal.

“This is exactly the kind of seemingly obscure data that would pique a foreign adversary's interest,” says Justin Sherman, CEO of Global Cyber Strategies, and author of the upcoming book _Navigating Technology and National Security_. “It’s not necessarily held in every dataset, but it speaks to a medical condition, it speaks to use of a powerful drug, and it speaks to something that could potentially be exploited in an intelligence context.”

Over the last decade or so, online advertising has evolved to include technologies capable of “micro-targeting” individuals based on surveillance data gathered from a wide variety of sources. Users are grouped into “segments” by data brokers who aim to isolate individuals with the help of unique mobile identifiers—alphanumeric strings that are assigned to mobile devices and are widely shared across the advertising ecosystem. These mobile IDs are employed to not only track a user’s movements but their online habits, including which apps they use, and are regularly combined with “cookies” that track web browsing behavior and purchasing information.

While the purpose of mobile IDs and other ad-based identifiers is, ostensibly, to help shield users’ identities, it is no secret that when combined with other datasets, it can become trivial to re-identify people whose information has been “anonymized.”

A government report declassified by the US Office of National Intelligence in June 2023 notes that commercial data may be combined to “reverse engineer identities or deanonymize various forms of information.” Advisers to the nation’s top spy at the time, Avril Haines, added in the report: “In the wrong hands, sensitive insights gained through \[commercially available information\] could facilitate blackmail, stalking, harassment, and public shaming.”

Demonstrating the point, many data brokers that exist on the periphery of Google’s advertising exchange work to assist marketers by crafting complex dossiers on individual consumers, “enriching” anonymized profiles with information drawn from a range of public and government sources. Frequently this includes credit card transactions, social media posts, bankruptcy filings, vehicle registration records, employment records, and hoards of web tracking data quietly amassed from websites, apps, and IoT devices.

With such access, data brokers aim to craft customized lists of potential targets, such as people who have “careers in the armed forces” and enjoy “gambling in general,” or those who are an “active conservative voter” likely to “participate in a civil protest,” according to the ICCL-provided data.

The manner in which the data was originally acquired by the ICCL provides a quintessential example of the ease with which rival foreign intelligence agencies can gain access to Americans’ data with minimal effort. Johnny Ryan, director of Enforce, ICCL’s investigative branch, says he was surprised by how easy the access came. “I was prepared for a complex process that would test my cover story,” he says, “but when I signed up there was no questions asked whatsoever.”

To gain access to the data broker’s segments, Ryan created a website for a fake “data analytics” firm. The “company” isn’t registered anywhere officially, but exists solely as a handful of web pages. On them, Ryan placed an image of a Russian soldier, apparently in the midst of combat, alongside a map of Ukraine. The firm’s work is vaguely described as helping “select clients” obtain “real-time” awareness of “targets” in the field. Ryan used this implausible cover while approaching data brokers based in the US.

“I could have been anybody,” he says.

To protect the integrity of ongoing research, WIRED agreed to delay identifying any data brokers being monitored by the ICCL.

Ryan’s research into ad-tech abuse informed a Federal Trade Commission lawsuit brought in 2024 against Mobilewalla, a data broker that, the FTC claims, widely offered access to segments used “specifically” to target “pregnant women and young mothers,” while also selling mobile IDs that tracked people visiting medical facilities and domestic abuse shelters. (Similarly, WIRED identified segments in the ICCL’s data that linked millions of mobile devices to expectant mothers, as well as more than 140 lists that referenced a “propensity” for “disease.” Fifty-one million mobile IDs belong to a segment aimed specifically at women likely to lack preventive care.)

According to the FTC government complaint, Mobilewalla collected more than 183 million mobile IDs in 2021 alone. Between 2018 and 2020, the company sourced roughly 60 percent of its data directly from real-time bidding (RTB) exchanges, marketplaces where advertisers compete for online ad space in lightning-fast auctions.

A complaint filed by Enforce and the Electronic Privacy Information Center (EPIC) last month urges the FTC to launch an investigation into whether Google’s RTB tools have allowed sensitive data to be made available to foreign adversaries—information that Ryan, along with other experts, says includes vast troves of personal data tied to “active military, intelligence personnel, and key leaders.”

Many of the conditions, behaviors, and traits reflected in the data, such as a likelihood of financial debt, propensity for high alcohol use, and certain medical conditions, are criteria that can adversely affect a federal employee’s eligibility to access classified information—illustrating the potential of its use for blackmail purposes.

EPIC and Enforce allege that Google both “directly” and “indirectly” provides foreign adversaries, including China, with “extraordinarily sensitive” commercial data concerning “America’s leaders and sensitive defense personnel,” while pointing the finger at Google as the predominant commercial entity behind a vast and widely ignored “national security crisis.”

“Google’s purported self-regulation cannot protect us,” says EPIC senior counsel Sara Geoghegan, whose complaint points to restrictions on data broker deals cemented last year under a new federal law, the Protecting Americans’ Data from Foreign Adversaries Act (PADFAA). According to Geoghegan, Google’s advertising tools pose a unique national threat, one that Congress has specifically charged the FTC with eliminating.

Google’s spokesperson Erica Walsh denies any wrongdoing on the part of the company, saying that, for instance, while Google’s ad exchanges continue to accept business from Chinese companies, it has long since ceased sharing data with Russian entities. Last year, she says, Google introduced a new system designed to identify companies with ties to China in order to restrict the types of information they receive about US consumers. “This means we never share data tied to a specific user in the US for bid requests to those known entities,” she says.

While the FTC has yet to introduce any cases based on PADFAA—and also declined to comment for this story—the law notably extends far beyond data that is merely “tied to a specific user.” Google and other US companies are now forbidden under law from providing companies with ties to hostile nations with any information that, no matter how anonymized, can be tied back to a specific user when combined “with other data.”

China is reported to have the world’s largest security and intelligence apparatus, employing a veritable army of hackers that have spent decades infiltrating US corporations and agencies to steal data, most recently compromising at least 11 of the nation’s telecommunications networks.

“It would be a joke for the Chinese government to link a mobile ad ID to a person's name,” says Sherman of Global Cyber Strategies.

Walsh notes that under Google’s new rules, mobile IDs are automatically stripped from RTB data served to Chinese entities. Along with other identifiers, Google also redacts the location data of devices being served the ads, limiting what Chinese companies can see to the name of a city. Google will provide the URL of a web page or the name of an app that an American is using, it says, but only in real time.

To ensure compliance, Walsh says, Google employs an independent company to “regularly” audit its authorized RTB buyers. Google declined to reveal more about the audits, but its public documentation suggests they are conducted at Google’s expense, “no more than once during each 12 month period.”

Zach Edwards, a longtime advertising-industry researcher and senior threat researcher at cybersecurity firm Silent Push, says Google’s efforts to limit the flow of data to China may ultimately have little effect. When a company wins a bid and its ad is served on a web page, he says, it becomes possible to acquire much of the same data that Google preemptively redacts, including a user's full IP address and detailed information about the device they are using. Chinese hackers have reportedly used this technique in the past to execute malicious code on millions of users’ devices—a threat known as “malvertising.”

“Redacting the bid request is totally moot,” Edward says. “If you take tens of millions of dollars from Chinese advertisers and don’t blink at them buying every impression, they outbid everyone and are able to get on the page.” According to recent reports, Chinese companies are spending “huge sums” on ads targeting US consumers, netting major profits for Meta, X, YouTube, and similar Silicon Valley firms that dominate the digital advertising market. In a February 2024 earnings call, Meta said that “China-based advertisers represented 10 percent of our overall revenue” for 2023, which totaled $133 billion.

“Even if Google were to change its practices and only initially broadcast RTB data to entities in the United States,” EPIC’s complaint says, the data would “inevitably” fall into foreign actors’ hands. “Google has no way to control what happens to the data that it broadcasts so freely,” it alleges. This was also the contention of the organization that develops technical standards for the advertising industry. Known as the Interactive Advertising Bureau (IAB), the organization acknowledged in 2018 that there is “no technical way to limit the way data is used after the data is received by a vendor.”

Foreign actors and private surveillance firms have been caught routinely exploiting RTB systems by creating shell advertising companies in order to access bid-stream data: information on users broadcast between the demand and supply sides of an RTB auction. In 2022, Adalytics, a digital ad analysis firm, published a report alleging that Google was sharing RTB data with RuTarget, an ad-tech firm owned by Russia’s largest state bank; activity that Google says it ceased in response. In 2023, Bloomberg reported that, by operating its own demand-side platform, an Israeli surveillance company called Rayzone had gained direct access to Google’s RTB data.

Last year, 404 Media reported on another Israeli tool called Patternz that was for leveraging access to Google’s system in the same manner.

Senator Ron Wyden of Oregon, who has authored legislation that would ban federal agencies from buying data that normally requires a warrant, says the fact that Google’s platform provides overseas companies access to any personal data on military and intelligence personnel is an “outrageous practice.” “Federal regulators should throw the book at Google,” he believes, “and cut off the company from federal contracts until it stops exposing our troops to harm.”

Internal Google communications cited by EPIC and Enforce reveal a historical reluctance by Google to take practical steps to remedy the problem, despite company leaders internally acknowledging the risk. A 2014 exchange, first revealed during a federal antitrust case two years ago, shows one senior executive acknowledging the “difficulty in figuring out what buyers are actually doing with the data we're sending.”

The remark prompted another executive to inquire as to what the “financial impact” may be of actually addressing the problem.

In another document, from late 2021, Google’s chief marketing officer, Lorraine Twohill, advises CEO Sundar Pichai to move the company away from real-time bidding, telling him: “Users point to our ads as THE reason why they can't trust Google and why they think we sell their personal information to 3rd parties.”

Twohill’s letter—sent on International Data Privacy Day—makes clear her opinion of Google’s advertising practices: “real time bidding on user data = bad,” she writes, before signing off, “Your privacy obsessed pal.”

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