SearchIndexer Suspicious Process Activity (via process_creation)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
process_creation
Author
HuntRule
Published
2026-05-31
Updated
2026-08-28

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 detects scenarios where SearchIndexer spwaned another process with the same name, or when SearchIndexer process exists in an unexpected directory.

Related detections9 linkedT1036 — drag to rearrange
Suspicious Cobalt Strike OCSP Malleable C2 Profile Traffic
Suspicious Spoofed Microsoft Host Header C2 by Stately Taurus
Suspicious Double Extension Image Executable by Fighting Ursa
Malicious Lotus Wiper Masqueraded Binary Execution from lotus Directory (via process_creation)
Suspicious Tusk Loader Execution from AppData AD_Security Directory
Suspicious OneDrive Masquerading TLB Marker File in ProgramData
Suspicious Svchost Execution from Non-Services Parent
Suspicious Executable Launched from PerfLogs Directory by Estate Ransomware
Malicious Renamed Python Interpreter svchostc Executing Script (via process_creation)
SearchIndexer Suspicious Process Activity (via process_creation)
Pivot detection · T1036 · 9 related

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