Detection rules › Sigma
Impacket WMIexec execution via SMB admin share
Detects scenarios where an attacker attempts to remotely execute WMIexec via SMB admin share in order to escalate privileges.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Lateral Movement | T1021.002 Remote Services: SMB/Windows Admin Shares |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Security-Auditing | Event ID 5145 | A network share object was checked to see whether client can be granted desired access. |
Rule body yaml
title: Impacket WMIexec execution via SMB admin share
description: Detects scenarios where an attacker attempts to remotely execute WMIexec via SMB admin share in order to escalate privileges.
references:
- https://github.com/mdecrevoisier/EVTX-to-MITRE-Attack/tree/master/TA0008-Lateral%20Movement/T1021.002%20-SMB%20Windows%20Admin%20Shares
- https://riccardoancarani.github.io/2020-05-10-hunting-for-impacket/#wmiexecpy
- https://www.darkoperator.com/blog/2017/10/14/basics-of-tracking-wmi-activity
- https://www.crowdstrike.com/blog/how-to-detect-and-prevent-impackets-wmiexec/
- https://www.microsoft.com/en-us/security/blog/2022/10/18/defenders-beware-a-case-for-post-ransomware-investigations/
tags:
- attack.lateral_movement
- attack.t1021.002
author: mdecrevoisier
status: experimental
logsource:
product: windows
service: security
detection:
selection:
EventID: 5145
ShareName: '\\*\ADMIN$'
RelativeTargetName|re: '__\d*\.\d*' # example: '__1619091076.1269338'. Can be changed in source code
condition: selection
falsepositives:
- None
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
EventID: 5145
ShareName: '\\*\ADMIN$'
RelativeTargetName|re: '__\d*\.\d*'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
RelativeTargetName | regex_match |
|
ShareName | wildcard |
|