CommentCrew-threat-apt1

Hunt Hypothesis

The CommentCrew-threat-apt1 rule detects potential adversary behavior involving suspicious comment creation or manipulation in Azure environments, which may indicate low-privilege persistence or reconnaissance. SOC teams should proactively hunt for this behavior to identify and mitigate early-stage threats that could escalate into more severe compromises.

YARA Rule

rule GOGGLES_APT1
{

    meta:
        author = "AlienVault Labs"
        info = "CommentCrew-threat-apt1"
        
    strings:
        $s1 = "Kill process success!" wide ascii
        $s2 = "Kill process failed!" wide ascii
        $s3 = "Sleep success!" wide ascii
        $s4 = "based on gloox" wide ascii
        $pdb = "glooxtest.pdb" wide ascii

    condition:
        all of ($s*) or $pdb
}

Deployment Notes

This YARA rule can be deployed in the following contexts:

• Microsoft Defender for Endpoint — Custom indicators / advanced hunting
• Email Gateway — Attachment scanning
• File Share Monitoring — Periodic scanning of shared drives
• YARA CLI — Manual threat hunting on endpoints

This rule contains 5 string patterns in its detection logic.

• Source Rule

False Positive Guidance

• Scenario: Scheduled system maintenance task using task scheduler
  Filter/Exclusion: process.parent_process_name != "schtasks.exe"

• Scenario: Admin performing a database backup using SQL Server Agent Job
  Filter/Exclusion: process.name != "sqlservr.exe" or process.parent_process_name != "sqlagent.exe"

• Scenario: IT staff running a network scan with Nmap during routine security assessment
  Filter/Exclusion: process.name != "nmap.exe" or process.parent_process_name != "powershell.exe"

• Scenario: User executing a script to generate reports using PowerShell and Export-Csv
  Filter/Exclusion: process.name != "powershell.exe" or process.command_line not like "*Export-Csv*"

• Scenario: System update process using Windows Update or WSUS
  Filter/Exclusion: process.name != "wusa.exe" or process.parent_process_name != "svchost.exe"