AntiDote12BetaDemoSISTeam

Hunt Hypothesis

This detection identifies potential adversary activity involving specific malware signatures or suspicious file artifacts defined by the AntiDote12 Beta demo profile within the Azure Sentinel environment. Proactive hunting for this behavior is essential to validate the efficacy of new YARA rules and uncover early-stage threats that may not yet trigger high-severity alerts, ensuring robust coverage against emerging attack vectors.

YARA Rule

rule AntiDote12BetaDemoSISTeam
{
      meta:
		author="malware-lu"
strings:
		$a0 = { 68 69 D6 00 00 E8 C6 FD FF FF 68 69 D6 00 00 E8 BC FD FF FF 83 C4 08 E8 A4 FF FF FF 84 C0 74 2F 68 04 01 00 00 68 B0 21 60 00 6A 00 FF 15 08 10 60 00 E8 29 FF FF FF 50 68 88 10 60 00 68 78 10 60 00 68 B0 21 60 00 E8 A4 FD FF FF 83 C4 10 33 C0 C2 10 00 90 90 90 90 90 90 90 90 90 90 90 90 8B 4C 24 08 56 8B 74 24 08 33 D2 8B C6 F7 F1 8B C6 85 D2 74 08 33 D2 F7 F1 40 0F AF C1 5E C3 90 8B 44 24 04 53 55 56 8B 48 3C 57 03 C8 33 D2 8B 79 54 8B 71 38 8B C7 F7 F6 85 D2 74 0C 8B C7 33 D2 F7 F6 8B F8 47 0F AF FE 33 C0 33 DB 66 8B 41 14 8D 54 08 18 33 C0 }

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

Here are 4 specific false positive scenarios for the AntiDote12BetaDemoSISTeam YARA rule, tailored to a legitimate enterprise environment:

• Scenario: Automated deployment of the “Demo” environment by the DevOps team using Ansible Tower.

  • Context: The Ansible controller executes a playbook that copies a demo-sis-team.bin artifact (containing the specific string signature) from the build server to the application servers during nightly maintenance windows.
  • Suggested Filter/Exclusion: Exclude file paths matching C:\Ansible\roles\sisteam-demo\artifacts\*.bin and restrict detection to the service account svc-ansible-deploy.

• Scenario: Execution of a scheduled PowerShell script by the System Integration (SI) team for end-of-month reporting.

  • Context: A recurring Task Scheduler job (SIS_Monthly_Report.ps1) runs on the file server, invoking a helper utility named AntiDote12BetaDemoSISTeam.exe to aggregate logs from the beta testing cluster.
  • Suggested Filter/Exclusion: Whitelist the executable path C:\Program Files\SIS\Tools\AntiDote12BetaDemoSISTeam.exe when executed by the user context DOMAIN\SI-Admin or via the specific Scheduled Task ID {A1B2-C3D4...}.

• Scenario: Legitimate backup verification process initiated by Veeam Backup & Replication.

  • Context: During the daily consistency check, Veeam mounts a virtual disk containing the beta demo image and scans it with an internal integrity checker that embeds the “AntiDote12BetaDemoSISTeam” signature within its metadata.
  • Suggested Filter/Exclusion: Create an exclusion for processes