Possible PetitPotam Coerce Authentication Attempt

Detect PetitPotam coerced authentication activity.

title: Possible PetitPotam Coerce Authentication Attempt
id: 1ce8c8a3-2723-48ed-8246-906ac91061a6
status: test
description: Detect PetitPotam coerced authentication activity.
references:
    - https://github.com/topotam/PetitPotam
    - https://github.com/splunk/security_content/blob/0dd6de32de2118b2818550df9e65255f4109a56d/detections/endpoint/petitpotam_network_share_access_request.yml
author: Mauricio Velazco, Michael Haag
date: 2021-09-02
modified: 2022-08-11
tags:
    - attack.credential-access
    - attack.t1187
logsource:
    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
falsepositives:
    - Unknown. Feedback welcomed.
level: high

• T1187Forced Authentication

• https://github.com/topotam/PetitPotam↗
• https://github.com/splunk/security_content/blob/0dd6de32de2118b2818550df9e65255f4109a56d/detections/endpoint/petitpotam_network_share_access_request.yml↗