Suspicious Windows Service Creation via New-Service or nssm

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-09-26
Updated
2026-09-26

ATT&CK techniques

Persistence → Priv Esc
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Defense Evasion

  6. Cred Access

  7. Discovery

  8. Lateral Movement

  9. Collection

  10. C2

  11. Exfiltration

  12. Impact

What it detects

This rule detects Windows service creation through the PowerShell New-Service cmdlet or the nssm service manager. Adversaries use these methods as alternatives to sc.exe to install persistent services. Unexpected use of these tools to register services should be investigated.

Related detections9 linkedT1543.003 — drag to rearrange
Suspicious svchost.exe Loading Unsigned DLL (via image_load)
Suspicious K7Soft Autostart Persistence
Suspicious Service ImagePath Pointing to ShieldNetWork Driver via Registry
Suspicious Scarab Service Persistence Registration via Registry (via registry_set)
Suspicious Embargo Service irnagentd Creation via Process Creation
Suspicious HotPage Driver Drop under ShieldNetWork Directory via File System
Malicious Vulnerable Driver Load by GentleKiller BYOVD EDR Killer
Malicious UPlugPlay Service Creation Masquerading as PlugPlay
Suspicious Service binPath Hijack Followed by System Reboot
Suspicious Windows Service Creation via New-Service or nssm
Pivot detection · T1543.003 · 9 related

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