PseudoSigner0232Lite003Anorganix

Hunt Hypothesis

This YARA rule targets specific binary artifacts associated with the PseudoSigner0232Lite003Anorganix signature, indicating the presence of potentially obfuscated or malicious code that may be used for initial access or privilege escalation. Proactively hunting for this signature in Azure Sentinel allows the SOC team to identify low-severity anomalies early, preventing the execution of stealthy payloads that could establish a foothold before more prominent detection triggers fire.

YARA Rule

rule PseudoSigner0232Lite003Anorganix
{
      meta:
		author="malware-lu"
strings:
		$a0 = { 60 06 FC 1E 07 BE 90 90 90 90 6A 04 68 90 10 90 90 68 }

condition:
		$a0 at pe.entry_point
}

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 1 string patterns in its detection logic.

• Source Rule

False Positive Guidance

• Scenario: A developer or DevOps engineer uses a custom Python or Node.js script to generate a self-signed code signing certificate for a local microservice or internal tool, specifically embedding the “Anorganix” identifier or a similar pseudo-signature string within the certificate metadata or binary header for testing purposes.

  • Filter/Exclusion: Exclude files located in specific development directories (e.g., C:\Users\<User>\dev\, C:\Projects\) or exclude processes initiated by development IDEs (e.g., code.exe, idea64.exe, pycharm64.exe) and interpreters (python.exe, node.exe) when the parent process is a known development tool.

• Scenario: An automated CI/CD pipeline (e.g., Jenkins, GitLab CI, or Azure DevOps) runs a build step that compiles a small utility or test harness, where the build tool injects a custom “Anorganix” tag or pseudo-signature into the resulting executable to distinguish it from production binaries in the artifact repository.

  • Filter/Exclusion: Exclude files created by CI/CD agent processes (e.g., jenkins-agent.exe, gitlab-runner.exe, azure-devops-agent.exe) or files located in standard build workspace directories (e.g., C:\jenkins\workspace\, C:\gitlab-runner\builds\).

• Scenario: A third-party software installer or updater (e.g., for a niche engineering tool or internal middleware) uses a lightweight signing mechanism that includes the “Anorganix” string as part of its internal versioning or build identification scheme, rather than a formal code signing certificate.

  • Filter/Exclusion: Exclude files whose parent process is a known installer or updater executable (e.g., msiexec.exe, setup.exe, update.exe) or exclude