Invoke-Obfuscation Via Use Rundll32 - PowerShell

 1title: Invoke-Obfuscation Via Use Rundll32 - PowerShell
 2id: a5a30a6e-75ca-4233-8b8c-42e0f2037d3b
 3status: test
 4description: Detects Obfuscated Powershell via use Rundll32 in Scripts
 5references:
 6    - https://github.com/SigmaHQ/sigma/issues/1009
 7author: Nikita Nazarov, oscd.community
 8date: 2019-10-08
 9modified: 2022-11-29
10tags:
11    - attack.defense-evasion
12    - attack.t1027
13    - attack.execution
14    - attack.t1059.001
15logsource:
16    product: windows
17    category: ps_script
18    definition: 'Requirements: Script Block Logging must be enabled'
19detection:
20    selection_4104:
21        ScriptBlockText|contains|all:
22            - '&&'
23            - 'rundll32'
24            - 'shell32.dll'
25            - 'shellexec_rundll'
26        ScriptBlockText|contains:
27            - 'value'
28            - 'invoke'
29            - 'comspec'
30            - 'iex'
31    condition: selection_4104
32falsepositives:
33    - Unknown
34level: high

References

• Invoke-Obfuscation · Issue #1009 · SigmaHQ/sigma

  

  Summary Tool: Invoke-Obfuscation — PowerShell command and script obfuscation framework Author: Daniel Bohannon, @danielhbohannon Type: Offensive tool, threat simulation Materials: The Invoke-Obfusc...

  
  Read More

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