43 lines
1.2 KiB
YAML
43 lines
1.2 KiB
YAML
|
|
title: Suspicious PsExec Execution
|
|
author: Samir Bousseaden
|
|
date: 2019/04/03
|
|
description: detects execution of psexec or paexec with renamed service name, this
|
|
rule helps to filter out the noise if psexec is used for legit purposes or if attacker
|
|
uses a different psexec client other than sysinternal one
|
|
detection:
|
|
SELECTION_1:
|
|
EventID: 5145
|
|
SELECTION_2:
|
|
ShareName: \\*\IPC$
|
|
SELECTION_3:
|
|
RelativeTargetName:
|
|
- '*-stdin'
|
|
- '*-stdout'
|
|
- '*-stderr'
|
|
SELECTION_4:
|
|
EventID: 5145
|
|
SELECTION_5:
|
|
ShareName: \\*\IPC$
|
|
SELECTION_6:
|
|
RelativeTargetName: PSEXESVC*
|
|
condition: ((SELECTION_1 and SELECTION_2 and SELECTION_3) and not (SELECTION_4
|
|
and SELECTION_5 and SELECTION_6))
|
|
falsepositives:
|
|
- nothing observed so far
|
|
id: c462f537-a1e3-41a6-b5fc-b2c2cef9bf82
|
|
level: high
|
|
logsource:
|
|
definition: The advanced audit policy setting "Object Access > Audit Detailed File
|
|
Share" must be configured for Success/Failure
|
|
product: windows
|
|
service: security
|
|
references:
|
|
- https://blog.menasec.net/2019/02/threat-hunting-3-detecting-psexec.html
|
|
status: experimental
|
|
tags:
|
|
- attack.lateral_movement
|
|
- attack.t1077
|
|
- attack.t1021.002
|
|
ruletype: SIGMA
|