ElicenseSystemV4000ViaTechInc

Hunt Hypothesis

This rule identifies the presence of the Elicense System v4.0.000 component, which may indicate the use of specific software licensing or management tools that adversaries could leverage for persistence or supply chain attacks. Proactively hunting for this artifact helps the SOC team verify the legitimacy of installed software and detect potential unauthorized or outdated components that could serve as entry points for compromise within the Azure environment.

YARA Rule

rule ElicenseSystemV4000ViaTechInc
{
      meta:
		author="malware-lu"
strings:
		$a0 = { 00 00 00 00 63 79 62 00 65 6C 69 63 65 6E 34 30 2E 64 6C 6C 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: The ElicenseSystemV4000ViaTechInc binary is executed directly by the System or Administrator account during a scheduled maintenance window to perform license validation or heartbeat checks for enterprise software (e.g., Adobe Creative Cloud, Microsoft Office, or specialized CAD tools).
  • Filter/Exclusion: Exclude executions where the parent process is schtasks.exe or Task Scheduler service (svchost.exe with specific task parameters), and the user context is SYSTEM or a dedicated service account (e.g., svc_licensing).
• Scenario: An IT administrator manually runs the licensing utility from the command line or PowerShell to troubleshoot activation issues or reset license states on a specific workstation or server.
  • Filter/Exclusion: Exclude executions where the parent process is cmd.exe, powershell.exe, or pwsh.exe, and the user belongs to the Domain Admins or IT_Ops security group.
• Scenario: A software deployment tool (such as SCCM, Intune, or PDQ Deploy) installs or updates the licensing component as part of a broader application package, triggering the binary execution during the installation phase.
  • Filter/Exclusion: Exclude executions where the parent process is ccmsetup.exe, msiexec.exe, or a known deployment agent (e.g., pdqdeploy.exe), and the working directory is within a standard deployment or temporary folder (e.g., C:\Windows\Temp\ or C:\ProgramData\Microsoft\CCM\).
• Scenario: The licensing service is restarted or re-initialized by a service management tool (like sc.exe or services.msc backend) after a system update or configuration change, causing the binary to launch under a service context.
  • **Filter