huntrule

Suspicious Active Directory Reconnaissance Output via ADRecon CSV (via file_event)

PremiumReviewedSigma · Medium · v1
Product
windows
Category
file_event
Author
HuntRule
Published
2026-10-18
Updated
2026-10-18
AnalysisDetection

ATT&CK techniques

Discovery

  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 creation of the ADRecon output file ComputerSPNs.csv, an artifact generated when Muddled Libra enumerates Active Directory service principal names during discovery. The CSV captures SPN data that enables Kerberoasting and lateral-movement targeting.

Reporting behind it

Related detections9 linkedT1087.002 — drag to rearrange
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Suspicious SOAPHound Style LDAP Query with SDflags and all_with_list via security
Suspicious SOAPHound Null Filter LDAP Query via security
Suspicious Active Directory Web Services Query from Localhost via SOAPHound
Suspicious LDAP Security Descriptor Enumeration via SD_FLAGS Control
Suspicious Active Directory Reconnaissance Output via ADRecon CSV (via file_event)
Pivot detection · T1087.002 · 9 related

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