PrivateexeProtector20SetiSoftTeam

Hunt Hypothesis

This rule identifies the presence of the PrivateexeProtector20SetiSoftTeam YARA signature, which is associated with a specific executable protector or obfuscation tool often used by adversaries to hide malicious payloads from static analysis. Proactively hunting for this indicator in Azure Sentinel allows the SOC to detect potentially stealthy or low-severity threats that may be leveraging this protection mechanism to evade standard detection controls within the environment.

YARA Rule

rule PrivateexeProtector20SetiSoftTeam
{
      meta:
		author="malware-lu"
strings:
		$a0 = { 00 00 00 00 00 00 00 00 [8] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 4B 45 52 4E 45 4C 33 32 2E 44 4C 4C 00 [4] 00 00 00 00 00 00 }

condition:
		$a0
}

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 IT admin manually runs the SetiSoftTeam private executable protector utility from a local workstation or jump host to obfuscate a custom internal tool before deployment.
  • Filter/Exclusion: Exclude processes where the parent process is an interactive shell (e.g., cmd.exe, powershell.exe, bash.exe) and the user context is a member of the Developers or IT_Admins group, provided the file path resides in a known development directory (e.g., C:\Dev\, D:\Projects\).
• Scenario: A scheduled maintenance job or CI/CD pipeline step on a build server executes the protector as part of an automated packaging workflow for a proprietary application.
  • Filter/Exclusion: Exclude executions where the parent process is a service host (e.g., svchost.exe, w3wp.exe, java.exe, node.exe) or a known CI agent (e.g., jenkins.exe, gitlab-runner.exe) and the working directory matches the build artifact path (e.g., C:\Builds\, /var/www/html/builds/).
• Scenario: An endpoint protection agent or software inventory tool (e.g., SCCM, Intune, or a custom GPO script) scans or executes the protector binary to verify version integrity or apply a patch to the protector itself.
  • Filter/Exclusion: Exclude processes where the parent process is a known management agent (e.g., ccmexec.exe, IntuneAgent.exe, wuaexesvc.exe) or where the command line contains arguments related to scanning, version checking, or patching (e.g., /scan, /version, /patch).
• Scenario: A legitimate third-party application installer or updater bundles the SetiSoftTeam protector