Rule Document 1:66529

Rule Category

OS-WINDOWS -- Snort has detected traffic targeting vulnerabilities in a Windows-based operating system. This does not include browser traffic or other software on the OS, but attacks against the OS itself. (such as?)

Alert Message

OS-WINDOWS Microsoft Defender denial of service malicious file download attempt

Rule Explanation

This rule looks for a specific binary signature associated with a known malicious tool targeting Microsoft Defender. Successful exploitation can lock the Defender service, causing a denial of service on the affected endpoint.

What To Look For

This rule fires on attempts to deliver a malicious file that exploits a denial of service vulnerability in Microsoft Defender on Windows systems.

Known Usage

Attacks/Scans seen in the wild

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group