Sigma rule: Possible PetitPotam Coerce Authentication Attempt

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-137dfaca79e4, updated 2022-08-11T00:00:00.000Z.

Rule

Title
Possible PetitPotam Coerce Authentication Attempt
Status
test
Level
high
Author
Mauricio Velazco, Michael Haag
Date
2021-09-02
Modified
2022-08-11
File
rules/windows/builtin/security/win_security_petitpotam_network_share.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detect PetitPotam coerced authentication activity.

Log source

product
windows
service
security
definition
The advanced audit policy setting "Object Access > Detailed File Share" must be configured for Success/Failure

Detection

selection:
    EventID: 5145
    ShareName|startswith: '\\\\' # looking for the string \\somethink\IPC$
    ShareName|endswith: '\IPC$'
    RelativeTargetName: lsarpc
    SubjectUserName: ANONYMOUS LOGON
condition: selection

False positives (as the rule lists them)

  • Unknown. Feedback welcomed.

Tags

  • attack.credential-access
  • attack.t1187

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/security/win_security_petitpotam_network_share.yml

Sources and licences

  • SigmaHQ

    "Possible PetitPotam Coerce Authentication Attempt" by Mauricio Velazco, Michael Haag (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/builtin/security/win_security_petitpotam_network_share.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Possible PetitPotam Coerce Authentication Attempt",
entity page, dataset version ref-137dfaca79e4, updated 2022-08-11T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/1ce8c8a3-2723-48ed-8246-906ac91061a6 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 1ce8c8a3-2723-48ed-8246-906ac91061a6, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.