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CommentCrew-threat-apt1

yara LOW Yara-Rules
aptcommunity
This rule was pulled from an open-source repository and enriched with AI. Validate in a test environment before deploying to production.
View original rule at Yara-Rules →
Retrieved: 2026-05-18T11:00:00Z · Confidence: medium

Hunt Hypothesis

CommentCrew-threat-apt1 detects potential adversary behavior involving suspicious comment-based PowerShell scripts that may be used for initial access or command and control. SOC teams should proactively hunt for this behavior in Azure Sentinel to identify and mitigate early-stage threats from unknown or evolving attack tactics.

YARA Rule

rule APT1_WEBC2_UGX
{

    meta:
        author = "AlienVault Labs"
        info = "CommentCrew-threat-apt1"
        
    strings:
        $persis = "SOFTWARE\\MICROSOFT\\WINDOWS\\CURRENTVERSION\\RUN" wide ascii
        $exe = "DefWatch.exe" wide ascii
        $html = "index1.html" wide ascii
        $cmd1 = "!@#tiuq#@!" wide ascii
        $cmd2 = "!@#dmc#@!" wide ascii
        $cmd3 = "!@#troppusnu#@!" wide ascii

    condition:
        3 of them
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

This rule contains 6 string patterns in its detection logic.

False Positive Guidance

Original source: https://github.com/Yara-Rules/rules/blob/main/malware/APT_APT1.yar