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Cryptolocker ransomware drops a PE file in the AppData\Roaming directory which then tries to load a DLL named "netapi32.dll". Therefore, we can drop our own DLL to intercept and terminate the malware pre-encryption. The exploit DLL checks if the current directory is "C:\Windows\System32" and if not we grab our process ID and terminate. We do not need to rely on hash signatures or third-party products as the malware's flaw does the work for us. Endpoint protection systems and or antivirus can potentially be killed prior to executing malware, but this method cannot as there's nothing to kill the DLL that just lives on disk waiting. From a defensive perspective you can add the DLLs to a specific network share containing important data as a layered approach. All basic tests were conducted successfully in a virtual machine environment.

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between April 29 and May 6. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,... [[ This is only the beginning! Please visit the blog for the complete entry ]]

April 2022 saw the arrival of three new ransomware gangs and the unwelcome return of an old enemy. The post Ransomware: April 2022 review appeared first on Malwarebytes Labs.

Rsyslog is a rocket-fast system for log processing. Modules for TCP syslog reception have a potential heap buffer overflow when octet-counted framing is used. This can result in a segfault or some other malfunction. As of our understanding, this vulnerability can not be used for remote code execution. But there may still be a slight chance for experts to do that. The bug occurs when the octet count is read. While there is a check for the maximum number of octets, digits are written to a heap buffer even when the octet count is over the maximum, This can be used to overrun the memory buffer. However, once the sequence of digits stop, no additional characters can be added to the buffer. In our opinion, this makes remote exploits impossible or at least highly complex. Octet-counted framing is one of two potential framing modes. It is relatively uncommon, but enabled by default on receivers. Modules `imtcp`, `imptcp`, `imgssapi`, and `imhttp` are used for regular syslog message reception. ...

Rsyslog is a rocket-fast system for log processing. Modules for TCP syslog reception have a potential heap buffer overflow when octet-counted framing is used. This can result in a segfault or some other malfunction. As of our understanding, this vulnerability can not be used for remote code execution. But there may still be a slight chance for experts to do that. The bug occurs when the octet count is read. While there is a check for the maximum number of octets, digits are written to a heap buffer even when the octet count is over the maximum, This can be used to overrun the memory buffer. However, once the sequence of digits stop, no additional characters can be added to the buffer. In our opinion, this makes remote exploits impossible or at least highly complex. Octet-counted framing is one of two potential framing modes. It is relatively uncommon, but enabled by default on receivers. Modules `imtcp`, `imptcp`, `imgssapi`, and `imhttp` are used for regular syslog message reception. ...

Red Hat Security Advisory 2022-1727-01 - Mozilla Thunderbird is a standalone mail and newsgroup client. This update upgrades Thunderbird to version 91.9.0. Issues addressed include a bypass vulnerability.

College Management System v1.0 was discovered to contain a SQL injection vulnerability via the course_code parameter.

With 80% of companies using cloud collaboration tools, cybercriminals are using multichannel phishing attacks to exploit security gaps in the hybrid work model.

The country has ordered companies operating VPNs to collect user data and hand it over to officials—but they’re refusing to do so.

An update for thunderbird is now available for Red Hat Enterprise Linux 8.4 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-1520: Mozilla: Incorrect security status shown after viewing an attached email * CVE-2022-29909: Mozilla: Bypassing permission prompt in nested browsing contexts * CVE-2022-29911: Mozilla: iframe Sandbox bypass * CVE-2022-29912: Mozilla: Reader mode bypassed SameSite cookies * CVE-2022-29913: Mozilla: Speech Synthesis feat...