Detection rules › Sigma

HackTool - Powerup Write Hijack DLL

Status
test
Severity
high
Log source
product windows, category file_event
Author
Subhash Popuri (@pbssubhash)
Source
github.com/SigmaHQ/sigma

Powerup tool's Write Hijack DLL exploits DLL hijacking for privilege escalation. In it's default mode, it builds a self deleting .bat file which executes malicious command. The detection rule relies on creation of the malicious bat file (debug.bat by default).

MITRE ATT&CK coverage

Event coverage

ProviderEventTitle
SysmonEvent ID 11FileCreate

Rule body yaml

title: HackTool - Powerup Write Hijack DLL
id: 602a1f13-c640-4d73-b053-be9a2fa58b96
status: test
description: |
    Powerup tool's Write Hijack DLL exploits DLL hijacking for privilege escalation.
    In it's default mode, it builds a self deleting .bat file which executes malicious command.
    The detection rule relies on creation of the malicious bat file (debug.bat by default).
references:
    - https://powersploit.readthedocs.io/en/latest/Privesc/Write-HijackDll/
author: Subhash Popuri (@pbssubhash)
date: 2021-08-21
modified: 2024-06-27
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: file_event
    product: windows
detection:
    selection:
        Image|endswith:
            - '\powershell.exe'
            - '\pwsh.exe'
        TargetFilename|endswith: '.bat'
    condition: selection
falsepositives:
    - Any powershell script that creates bat files # highly unlikely (untested)
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|endswith:
        - '\powershell.exe'
        - '\pwsh.exe'
    TargetFilename|endswith: '.bat'

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.

FieldKindValues
Imageends_with
  • \powershell.exe corpus 182 (sigma 182)
  • \pwsh.exe corpus 168 (sigma 168)
TargetFilenameends_with
  • .bat corpus 17 (sigma 17)