huntrule

Windows Process: SyncAppvPublishingServer.exe Executes PowerShell via PowerShell-encoded command

Alerts when SyncAppvPublishingServer.exe is launched with a command-line pattern indicative of PowerShell code execution.

FreeReviewedSigma · Medium · v2
Product
windows
Category
process_creation
Author
frack113 (SigmaHQ), DRL 1.1
Published
2021-07-12
Updated
2026-07-31
AnalysisDetection

ATT&CK techniques

Defense Evasion

  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule flags process creation events where SyncAppvPublishingServer.exe is launched with a command line containing the PowerShell-encoded pattern "n; ". Attackers may use this signed Windows binary to run arbitrary PowerShell commands under a trusted process context. The detection relies on process creation telemetry, including Image/OriginalFileName and CommandLine content matching.

Reporting behind it

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Windows Process: SyncAppvPublishingServer.exe Executes PowerShell via PowerShell-encoded command
Pivot detection · T1218 · 9 related

Changelog

v2
  1. v2
    Candidate ingested via manual entry.2026-07-31
  2. v1
    No changelog recorded for this version.2026-07-30

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.