Critical Zero-Day Exploit Targeted by QakBot Malware, Prompting Urgent Windows Patch

  • Last updated May 15, 2024
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A recently discovered zero-day vulnerability in the Windows operating system has been aggressively exploited by the notorious QakBot malware, pushing Microsoft to release an urgent security patch. This exploit, labeled CVE-2024-30051, was spotlighted due to its severe implications for system security, allowing unauthorized system privileges.

In early April 2024, cybersecurity experts at Kaspersky stumbled upon this vulnerability while scrutinizing a separate Windows flaw, CVE-2023-36033. Their investigations led to a troubling discovery in the Windows Desktop Window Manager (DWM).

A document on VirusTotal dated April 1st first hinted at this unpatched flaw, which Kaspersky confirmed as a new zero-day, describing it as a vulnerability “leading to system privilege escalation.”

Once verified, Kaspersky “reported their findings to Microsoft,” prompting an immediate response. The tech giant acknowledged the severity of the flaw and incorporated a fix in its “Patch Tuesday updates on May 14, 2024.”

However, the exploitation did not wait for the patch. Mid-April reports indicated that the exploit was actively being used to deliver QakBot and other malware, showing that “multiple threat actors had access to this vulnerability,” as evident from the tweet below:


This situation underscores the ever-present cyber threat landscape where new vulnerabilities are rapidly weaponized. It also highlights the critical need for vigilant cybersecurity practices among users and organizations.

Microsoft and Kaspersky urge all users to apply the latest patches to safeguard against such vulnerabilities. Additionally, Kaspersky plans to “publish technical details once users have time to patch,” ensuring the broader community can defend against similar attacks.

To stay protected against such sophisticated threats, users should utilize the best VPNs and other security measures that offer robust data encryption and online anonymity, further securing devices from potential intrusions and ensuring safe internet usage.


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