The Kaleidoscope ad fraud network uses a combination of legitimate and malicious apps, according to researchers.

Researchers have discovered a very versatile ad fraud network—known as Kaleidoscope—that bombards users with unskippable ads.

Normally, ad fraud is not a concern for users of infected devices. They might experience some sluggish behavior on their device, but often that’s the extent of it. Ad fraud is a type of scam aimed at companies, causing them to pay for advertisements that nobody actually sees or clicks on. Instead of real people viewing or clicking on ads, fraudsters use automated programs (bots) or other tricks to generate fake views, clicks, or interactions.

As a result, the advertising company pays for ads without receiving any real value in return. Users of infected devices usually don’t notice anything, since the malicious activity takes place in the background. This also helps the malware avoid detection.

However, the newly discovered ad fraud operation, dubbed Kaleidoscope, is different. Kaleidoscope targets Android users through seemingly legitimate apps in the Google Play Store, as well as malicious lookalikes distributed through third-party app stores.

Both versions of the app share the same app ID. Researchers found over 130 apps associated with Kaleidoscope, resulting in approximately 2.5 million fraudulent installs per month.

Advertisers believe they are paying for ads shown in the “legitimate” app, while users who download versions from third-party app stores are bombarded with the same ads—but they can’t skip them. Because both apps use the same app ID, advertisers never know the difference.

Kaleidoscope is very similar to, and appears to be built on, the CaramelAds ad fraud network, which also used duplicate apps and shares similarities in code and underlying infrastructure.

The researchers explain:

> “The malicious app delivers intrusive out-of-context ads under the guise of the benign app ID in the form of full-screen interstitial images and videos, triggered even without user interaction.”

**How to protect your device**

Google Play Protect automatically protects users against apps that engage in malicious behavior. As a result, the researchers didn’t find any malicious Kaleidoscope versions on the Google Play Store.

To keep your devices free from ad fraud related malware:

*   Get your apps from the Google Play store whenever you can.
*   Be careful about the permissions you allow a new app. Does it really need those permissions for what it’s supposed to do? In this case the “Display over other apps” should raise a red flag.
*   Dubious ad sites often request permission to display notifications. Allowing this will increase the number of ads as they push them to the device’s notification bar.
*   Use up-to-date and active security software on your Android.

Malwarebytes detects malware from the Kaleidoscope family as **Adware.AdLoader.EXTNXN**.

**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 users bombarded with unskippable ads 

Microsoft on Tuesday released software updates to fix at least 70 vulnerabilities in Windows and related products, including five zero-day flaws that are already seeing active exploitation. Adding to the sense of urgency with this month's patch batch from Redmond are fixes for two other weaknesses that now have public proof-of-concept exploits available.

**Microsoft** on Tuesday released software updates to fix at least 70 vulnerabilities in **Windows** and related products, including _five zero-day flaws that are already seeing active exploitation_. Adding to the sense of urgency with this month’s patch batch from Redmond are fixes for two other weaknesses that now have public proof-of-concept exploits available.

Microsoft and several security firms have disclosed that attackers are exploiting a pair of bugs in the **Windows Common Log File System** (CLFS) driver that allow attackers to elevate their privileges on a vulnerable device. The Windows CLFS is a critical Windows component responsible for logging services, and is widely used by Windows system services and third-party applications for logging. Tracked as CVE-2025-32701 & CVE-2025-32706, these flaws are present in all supported versions of Windows 10 and 11, as well as their server versions.

**Kev Breen**, senior director of threat research at **Immersive Labs**, said privilege escalation bugs assume an attacker already has initial access to a compromised host, typically through a phishing attack or by using stolen credentials. But if that access already exists, Breen said, attackers can gain access to the much more powerful Windows SYSTEM account, which can disable security tooling or even gain domain administration level permissions using credential harvesting tools.

“The patch notes don’t provide technical details on how this is being exploited, and no Indicators of Compromise (IOCs) are shared, meaning the only mitigation security teams have is to apply these patches immediately,” he said. “The average time from public disclosure to exploitation at scale is less than five days, with threat actors, ransomware groups, and affiliates quick to leverage these vulnerabilities.”

Two other zero-days patched by Microsoft today also were elevation of privilege flaws: CVE-2025-32709, which concerns afd.sys, the **Windows Ancillary Function Driver** that enables Windows applications to connect to the Internet; and CVE-2025-30400, a weakness in the **Desktop Window Manager** (DWM) library for Windows. As **Adam Barnett** at **Rapid7** notes, tomorrow marks the one-year anniversary of CVE-2024-30051, a previous zero-day elevation of privilege vulnerability in this same DWM component.

The fifth zero-day patched today is CVE-2025-30397, a flaw in the **Microsoft Scripting Engine**, a key component used by **Internet Explorer** and **Internet Explorer mode** in **Microsoft Edge**.

**Chris Goettl** at **Ivanti** points out that the Windows 11 and Server 2025 updates include some new AI features that carry a lot of baggage and weigh in at around 4 gigabytes. Said baggage includes new artificial intelligence (AI) capabilities, including the controversial **Recall** feature, which constantly takes screenshots of what users are doing on Windows CoPilot-enabled computers.

Microsoft went back to the drawing board on Recall after a fountain of negative feedback from security experts, who warned it would present an attractive target and a potential gold mine for attackers. Microsoft appears to have made some efforts to prevent Recall from scooping up sensitive financial information, but privacy and security concerns still linger. Former Microsoftie **Kevin Beaumont** has a good teardown on Microsoft’s updates to Recall.

In any case, **windowslatest.com** reports that **Windows 11 version 24H2** shows up ready for downloads, even if you don’t want it.

“It will now show up for ‘download and install’ automatically if you go to Settings > Windows Update and click Check for updates, but only when your device does not have a compatibility hold,” the publication reported. “Even if you don’t check for updates, Windows 11 24H2 will automatically download at some point.”

Apple users likely have their own patching to do. On May 12 Apple released security updates to fix at least 30 vulnerabilities in **iOS** and **iPadOS** (the updated version is 18.5). **TechCrunch** writes that iOS 18.5 also expands emergency satellite capabilities to iPhone 13 owners for the first time (previously it was only available on iPhone 14 or later).

Apple also released updates for **macOS Sequoia**, **macOS Sonoma**, **macOS Ventura**, **WatchOS**, **tvOS** and **visionOS**. Apple said there is no indication of active exploitation for any of the vulnerabilities fixed this month.

As always, please back up your device and/or important data before attempting any updates. And please feel free to sound off in the comments if you run into any problems applying any of these fixes.

Patch Tuesday, May 2025 Edition

A new extra-secure mode for Android 16 will let at-risk users lock their devices down.

With the rise of mercenary spyware and other targeted threats, tech giants like Apple, Google, and Microsoft have spent the last few years trying to figure out how to protect the digital lives of their most at-risk, vulnerable users around the world. On mobile, the launch of Apple's iOS Lockdown Mode in 2022 was one concerted effort to shed nonessential functionality in favor of maximum security—a trade-off most users wouldn't want to make, but that could be very worth it for a public figure, activist, journalist, or dissident living under daily scrutiny and threat of attack. For years, Google has offered a program for a similar demographic called Advanced Protection that focuses on adding additional layers of monitoring and security to vulnerable users' Google accounts, a core piece of many people's digital lives that could be devastating if compromised. Now, Google is extending Advanced Protection with a suite of features for Android 16.

On Tuesday, the company announced an Advanced Protection mode for phones running the newest version of Android. At its core, the mode is designed around imposing strong security settings on all apps and services to silo data as much as possible and reduce interactions with unsecured web services and previously unknown, untrusted individuals. Advanced Protection on Android is meant to be as usable and flexible as possible, though, leaning on Google's rapidly expanding on-device AI scanning capabilities to provide monitoring and alerts without having to completely eliminate features. Still, the mode imposes restrictions that can't be turned off, like blocking phones from connecting to historic 2G data networks and disabling Chrome's Javascript optimizer, which could alter or break some web functionality on some sites.

“There are two classes of things that we use to defend the user. One is you obviously harden the system, so you try to lock things down, you prevent many forms of attacks," says Dave Kleidermacher, vice president of engineering at Android’s security and privacy division. "But two is you can't always prevent every attack entirely. But if you can detect that you've been compromised, you can take some sort of corrective action. In consumer security on mobile this detection has never really been a possibility, so that's one of the big things we've done here."

This monitoring and detection capability, known as Intrusion Logging, uses end-to-end encryption to indelibly store logs from your device in the cloud such that they can't be accessed by Google or any party aside from you, but also in a form that can't be deleted or modified, even if your device and Google account are compromised.

Logging and system monitoring tools are common on laptops and desktops—not to mention in enterprise IT environments—but offering the capabilities for consumers on mobile devices is more unusual. As with any scheme that takes data off a device and puts it in the cloud, the system does introduce some new risks, but Google and Google Cloud Services already run many end-to-end encrypted platforms for users, and Kleidermacher notes that the ability to create indelible logs that can't be manipulated or deleted by a sophisticated attacker is invaluable in addressing targeted attacks.

“The main innovation here is you have an audit log mechanism to detect compromise that is actually resistant to device tampering,” he says. “It's bringing intrusion detection to the consumer. So if you as a consumer suspect a problem and you're not sure, you can pull the logs down from the cloud. You can share them with a security expert, you can share them with an NGO, and they can use tools for analysis.”

Another feature that is on by default and can't be turned off in Advanced Protection is Android's Memory Tagging Extension (MTE). The feature, which debuted for Google's Pixel line and is starting to be adopted in processors on other devices, is a hardware security protection related to how a system manages its memory. If an attacker attempts to exploit a memory vulnerability such as a so-called buffer overflow, MTE will cause the process to fail, stopping the attack in its tracks. Memory corruption bugs are a common tool used by hackers, so neutering the entire class of vulnerabilities makes it much more difficult to attack a device.

Most Advanced Protection features will launch next week with Android 16, but Google says that Intrusion Logging is coming later this year along with features like USB protections that will prevent untrusted peripherals from using your phone's charging port for data transfers. And Google is also offering an API for integrating Advanced Protection directly into third-party apps. When a user turns Advanced Protection on, Android will impose enhanced defenses broadly across the operating system, but third-party integration will enable deeper defenses within non-Google apps.

“You want to prevent as much as you can, and a lot of these features are locking down the phone in ways that will make some attacks just much, much harder for attackers, more expensive, or even impossible,” Kleidermacher says.

Courtesy of Google

Google’s Advanced Protection for Vulnerable Users Comes to Android

How do you profile actors and defend your systems when multiple threat actors are working together? In Part 2, Cisco Talos proposes an extended Diamond Model to analyze complex relationships between attackers.

Defining a new methodology for modeling and tracking compartmentalized threats

Roblox hit with class action over alleged secret tracking of kids’ data; lawsuit claims privacy law violations and…

Roblox hit with class action over alleged secret tracking of kids’ data; lawsuit claims privacy law violations and unauthorized data sharing.

Roblox, a platform known for its popularity among children and teens, is now the focus of a class action lawsuit that accuses the company of covertly harvesting data from its youngest users.

Filed in a California federal court by plaintiffs Michael and Salena Garcia, the suit claims Roblox has been quietly monitoring players without proper consent. According to the 45-page complaint, Roblox uses hidden tracking tools to collect a wide range of data, from keystrokes and chat messages to mouse activity and search queries.

The lawsuit also alleges that the company links these interactions to individual devices using unique identifiers. This allows Roblox to build detailed behavioural profiles of players, which the plaintiffs say are used for targeted content and shared with third-party advertisers.

Roblox has been secretly collecting detailed personal data and intercepting user activity through hidden tracking code built into its site and apps, without users or their parents knowing.

> _“This data surveillance begins the moment a user visits or launches Roblox, even before account login or consent, and continues across platforms (web, iOS, Android, macOS, Windows) via persistent identifiers and fingerprinting techniques.”_
> 
> _Source: Class Action Complaint, Garcia v. Roblox Corporation, U.S. District Court, Northern District of California, 2024._

This legal move puts Roblox in the same spotlight as other tech companies facing criticism over data privacy practices affecting children. While the company promotes itself as a safe space for play and creativity, the complaint suggests a different story unfolding behind the scenes.

Kern Smith, Vice President of Global Solutions at mobile security firm Zimperium, warns that mobile security often takes a back seat in discussions about child safety online. “Parents focus heavily on what their kids are doing in the game, but the device and the app itself are also areas of concern,” he said.

“When a mobile app is widely used, it becomes a bigger target for phishing, malware, and data breaches. If a phone or tablet is compromised, it opens the door for attackers to access sensitive data or manipulate app behaviour.”

The lawsuit shows the public worry about how companies collect and use data from minors. Under federal law, including the Children’s Online Privacy Protection Act (COPPA), companies must obtain verifiable parental consent before collecting personal data from children under 13. The Garcias claim that Roblox sidesteps these requirements through silent tracking that parents never see.

For now, the case remains in the early stages, but it indicates legal pressure on platforms serving young audiences. If the court finds the claims valid, Roblox could face serious consequences, not only in the form of financial penalties but also tougher oversight of its data handling practices.

Parents concerned about their child’s digital safety are advised to monitor not only app content but also the security of the devices their kids use. Tools that offer real-time threat detection and malware protection can help reduce risks tied to invisible data collection.

Roblox Corporation has not issued a public statement in response to the lawsuit as of publication.

Roblox Lawsuit Claims Hidden Tracking Used to Monetize Kids Data

A list of topics we covered in the week of May 4 to May 10 of 2025

May 9, 2025 - Google announced it will equip Chrome with an AI driven method to detect and block Tech Support Scam websites

May 8, 2025 - As per a recent FBI warning, criminals are phishing users of payroll, and similar platforms to not only steal their credentials but also their funds.

May 8, 2025 - We're rolling out a brand new feature in Malwarebytes for iOS: the ability to block Google sponsored ads directly on Safari.  

May 8, 2025 - The age of AI guessing our passwords is upon us, and we need to change the ways we authenticate and use passwords where we have no alternatives.

May 8, 2025 - Meta has won almost $170m in damages from Israel-based NSO Group, maker of the Pegasus spyware.

 A week in security (May 4 &#8211; May 10) 

Google announced it will equip Chrome with an AI driven method to detect and block Tech Support Scam websites

Google has expressed plans to use Artificial Intelligence (AI) to stop tech support scams in Chrome.

With the launch of Chrome version 137, Google plans to use the on-device Gemini Nano large language model (LLM) to recognize and block tech support scams.

Users already have the ability to chose Enhanced Protection under **Settings > Privacy and security > Security > Safe Browsing.**

Safe Browsing settings

Google’s reasoning, and we agree, is that LLMs are fairly good at understanding and classifying the varied, complex nature of websites. Meaning that, since many malicious sites have a very short lifespan, it is more effective to learn and recognize their behavior rather than keep adding a host of domain names to a block-list (something which Google has frustrated with the introduction of Manifest V3, by the way).

Tech support scams typically follow a certain pattern that should be simple to learn:

*   They make your browser tab full screen
*   Display the number they want you to call all over the place
*   Show the visitor fake ongoing scans and alerts

These are just a few of the characteristics I’d teach the LLM. I’m not speaking for Google here. They just mention they’ll be looking at usage of the Keyboard Lock API.

On that, the Keyboard Lock API is a web technology that allows websites to “capture” keyboard input, meaning they can prevent certain key combinations (or all keys) from working as they normally do in your browser or operating system. Originally, this tool was designed for legitimate purposes, like making web games or remote desktop apps more immersive by stopping accidental key presses from interrupting the experience. But tech support scammers exploit the Keyboard Lock API to make it harder for victims to escape their scam pages. This means that when a visitor tries to close the scam page or switch to another program, nothing happens, making them feel trapped on the site. Which also makes them think their system is actually infected.

Google explains why it went for the on-device method, saying it allows them to see the threats at the same moment the users see them and in the same way the users see them.

> “We’ve found that the average malicious site exists for less than 10 minutes, so on-device protection allows us to detect and block attacks that haven’t been crawled before.”

**How it works**

When the user lands on a suspicious page, which is decided by the on-device LLM, based on specific triggers like the Keyboard Lock API, Chrome provides the LLM with the contents of the page that the user is on and queries it to extract security signals, such as the intent of the page. This information is then sent to a Safe Browsing server for a final verdict.

If Safe Browsing decides the website is malicious, Chrome will block the content and show the user a big warning screen, called an “interstitial.”

Image courtesy of Google

By making the target think their system is infected, tech support scammers try to gain remote access or obtain payment information. Google says:

> “Tech Support scams are an increasingly prevalent form of cybercrime, characterized by deceptive tactics aimed at extorting money or gaining unauthorized access to sensitive data.”

Malwarebytes’ Browser Guard data over the last month shows that 30% of the fraudulent websites we blocked through the browser extensions are tech support scams.

30% of the three fraud categories are TSS

So, it’s nice of Google to let Chrome help us take care of some of those, but Chrome is not the only browser. We’re even hearing stories from users that ran into a website telling them their Windows machine was infected while they were using the Safari browser on their iPad.

**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.

 Google Chrome will use AI to block tech support scam websites 

Uncontrolled Resource Consumption vulnerability in Apache Commons Configuration 1.x.

There are a number of issues in Apache Commons Configuration 1.x that allow excessive resource consumption when loading untrusted configurations or using unexpected usage patterns. The Apache Commons Configuration team does not intend to fix these issues in 1.x. Apache Commons Configuration 1.x is still safe to use in scenarios where you only load trusted configurations. 

Users that load untrusted configurations or give attackers control over usage patterns are recommended to upgrade to the 2.x version line, which fixes these issues. Apache Commons Configuration 2.x is not a drop-in replacement, but as it uses a separate Maven groupId and Java package namespace they can be loaded side-by-side, making it possible to do a gradual migration.

1.  GitHub Advisory Database
2.  GitHub Reviewed
3.  CVE-2025-46392

**Apache Commons Configuration Uncontrolled Resource Consumption**

Low severity GitHub Reviewed Published May 9, 2025 to the GitHub Advisory Database • Updated May 9, 2025

**Package**

maven commons-configuration:commons-configuration (Maven)

**Affected versions**

<= 1.10

Uncontrolled Resource Consumption vulnerability in Apache Commons Configuration 1.x.

There are a number of issues in Apache Commons Configuration 1.x that allow excessive resource consumption when loading untrusted configurations or using unexpected usage patterns. The Apache Commons Configuration team does not intend to fix these issues in 1.x. Apache Commons Configuration 1.x is still safe to use in scenarios where you only load trusted configurations.

Users that load untrusted configurations or give attackers control over usage patterns are recommended to upgrade to the 2.x version line, which fixes these issues. Apache Commons Configuration 2.x is not a drop-in replacement, but as it uses a separate Maven groupId and Java package namespace they can be loaded side-by-side, making it possible to do a gradual migration.

**References**

*   https://nvd.nist.gov/vuln/detail/CVE-2025-46392
*   https://lists.apache.org/thread/y1pl0mn3opz6kwkm873zshjdxq3dwq5s
*   https://www.cve.org/CVERecord?id=CVE-2024-29131
*   https://www.cve.org/CVERecord?id=CVE-2024-29133

Published to the GitHub Advisory Database

May 9, 2025

GHSA-pvp8-3xj6-8c6x: Apache Commons Configuration Uncontrolled Resource Consumption

We're rolling out a brand new feature in Malwarebytes for iOS: the ability to block Google sponsored ads directly on Safari.

Sponsored ads on Google search don’t just irritate users—they also provide a dangerous opportunity for cybercriminals to spread malware and scams to their unsuspecting victims. What looks like a harmless search result can be a carefully disguised trap.  

At Malwarebytes, our researchers have uncovered a variety of threats hiding in plain sight within these sponsored ads, including Mac stealers distributed through Google Ads, scams targeting popular utility software, and tech support traps.  

In some cases, scammers use advanced AI tools like DeepSeek AI to create convincing ads and web pages, increasing the risk to unsuspecting users.  

That’s why we’re excited to roll out a brand new feature in Malwarebytes for iOS: the ability to block Google sponsored ads directly on Safari.  

If you’ve used our iOS app before, you already know it blocks ads on webpages and ad trackers. But with our newest feature, we’re extending protection to cover those annoying and potentially dangerous sponsored ads listed on search results.  

Now, with just a simple toggle, you can make those annoying sponsored ads disappear from your Safari browsing experience.  

**Try it for yourself**: Download Malwarebytes for iOS and enjoy this feature—alongside scam text filtering, a privacy VPN, and call protection—with a free seven-day trial.  

Existing users should already have this feature option in their app—check it out now!

**Don’t have an iOS device?** Download our free Browser Guard extension for ad blocking and scam protection while browsing on your desktop.

 Tired of Google sponsored ads? So are we! That’s why we’re introducing the option to block them on iOS     

Meta has won almost $170m in damages from Israel-based NSO Group, maker of the Pegasus spyware.

Meta has won almost $170m in damages from Israel-based NSO Group, maker of the Pegasus spyware. The ruling comes after a six-year legal case against the company after Meta accused it of misusing its servers to spy on users.

According to the original complaint against NSO Group, filed in October 2019, the spyware vendor used WhatsApp servers to send malware to around 1400 mobile phones. The purpose was to gain access to the messages on those devices, which were typically used by attorneys, journalists, human rights activists, political dissidents, diplomats, and other senior foreign government officials.

NSO Group reverse engineered WhatsApp’s software and developed its own software and servers to send messages to victims via the WhatsApp service that contained malware. That malware installed itself on the victims’ smartphones using a zero-click attack, meaning that the victim didn’t have to take any action such as opening an link or even answering a call for the compromise to happen; it was enough simply for the message to arrive.

A judge ruled in December that NSO Group had repeatedly dodged requests to provide its code for review, and granted Meta partial summary judgment over the vendor. That set up conditions for a trial to determine damages that started in late April.

NSO Group reportedly argued that Facebook lost nothing as part of the attack, arguing that it should pay the minimum amount in damages. However, the jury awarded Meta $444,719 in compensatory damages and $167,254,000 in punitive damages.

NSO Group is no stranger to controversy. The US federal government blacklisted it in 2021 for enabling foreign governments to spy on a range of people in acts of “transnational repression”. The same year, investigative website The Pegasus Project alleged that the company targeted over 180 journalists around the world. The European Data Protection Supervisor recommended an EU ban on the technology in 2022, although this has not yet happened.

The ruling drew praise from Amnesty International, which had filed a court brief as part of the case outlining the human rights implications of the attacks on Meta. The organization commented:

> “This decision should serve as a wake-up call to governments to take proactive, concrete steps to regulate the surveillance industry, to enforce safeguards on their surveillance practices, and to comprehensively ban tools that are inherently incompatible with human rights obligations and standards, such as Pegasus,”

One takeaway stands out for our readers: end-to-end encryption is important for privacy, but it is not enough on its own.

As Meta pointed out in its complaint, NSO couldn’t decrypt WhatsApp messages in transit to users because they are encrypted when they’re sent from one device and stay unreadable until they’re decrypted by the receiving device. However, that doesn’t stop someone from reading the messages after they’re decrypted by the receiving device—someone who compromises your smartphone or PC has control over all of the data on it, including those decrypted messages.

For consumers, this means applying more layer of protection in the form of regular updates, security software, and cybersecurity awareness. Never open links, files, or videos from someone you don’t know. Be skeptical even if they’re from someone you do know—we recommend checking with them over a different channel first to ensure it was really them that sent it.

In this case, even that would not have enough, because NSO Group was able to infect phones without the victim even answering the call. Attacks this sophisticated often target people with sensitive roles such as journalists, activists, and government workers. Google has an advanced protection program for people like this, while Apple launched lockdown mode for high-risk users. Facebook has its own initiative.

**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.

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