Detection rules › Sigma
PSEXEC Remote Execution File Artefact
Detects creation of the PSEXEC key file. Which is created anytime a PsExec command is executed. It gets written to the file system and will be recorded in the USN Journal on the target system
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1136.002 Create Account: Domain Account, T1543.003 Create or Modify System Process: Windows Service |
| Privilege Escalation | T1543.003 Create or Modify System Process: Windows Service |
| Lateral Movement | T1570 Lateral Tool Transfer |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 11 | FileCreate |
Rule body yaml
title: PSEXEC Remote Execution File Artefact
id: 304afd73-55a5-4bb9-8c21-0b1fc84ea9e4
status: test
description: Detects creation of the PSEXEC key file. Which is created anytime a PsExec command is executed. It gets written to the file system and will be recorded in the USN Journal on the target system
references:
- https://aboutdfir.com/the-key-to-identify-psexec/
- https://twitter.com/davisrichardg/status/1616518800584704028
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-21
modified: 2023-02-23
tags:
- attack.lateral-movement
- attack.privilege-escalation
- attack.execution
- attack.persistence
- attack.t1136.002
- attack.t1543.003
- attack.t1570
- attack.s0029
logsource:
category: file_event
product: windows
detection:
selection:
TargetFilename|startswith: 'C:\Windows\PSEXEC-'
TargetFilename|endswith: '.key'
condition: selection
falsepositives:
- Unlikely
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
TargetFilename|startswith: 'C:\Windows\PSEXEC-'
TargetFilename|endswith: '.key'
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 |
|---|---|---|
TargetFilename | ends_with |
|
TargetFilename | starts_with |
|