Potentially Suspicious Child Process of KeyScrambler.exe

Detects potentially suspicious child processes of KeyScrambler.exe

Detection logic

selection_parent

ParentImage|endswith: \KeyScrambler.exe

selection_binaries

- Image|endswith:
    - \cmd.exe
    - \cscript.exe
    - \mshta.exe
    - \powershell.exe
    - \pwsh.exe
    - \regsvr32.exe
    - \rundll32.exe
    - \wscript.exe
- OriginalFileName:
    - Cmd.Exe
    - cscript.exe
    - mshta.exe
    - PowerShell.EXE
    - pwsh.dll
    - regsvr32.exe
    - RUNDLL32.EXE
    - wscript.exe

Condition

all of selection_*

Raw YAML

title: Potentially Suspicious Child Process of KeyScrambler.exe
id: ca5583e9-8f80-46ac-ab91-7f314d13b984
related:
    - id: d2451be2-b582-4e15-8701-4196ac180260
      type: similar
status: test
description: Detects potentially suspicious child processes of KeyScrambler.exe
references:
    - https://twitter.com/DTCERT/status/1712785421845790799
author: Swachchhanda Shrawan Poudel
date: 2024-05-13
tags:
    - attack.persistence
    - attack.execution
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1203
    - attack.t1574.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_parent:
        ParentImage|endswith: '\KeyScrambler.exe'
    selection_binaries:
        # Note: add additional binaries that the attacker might use
        - Image|endswith:
              - '\cmd.exe'
              - '\cscript.exe'
              - '\mshta.exe'
              - '\powershell.exe'
              - '\pwsh.exe'
              - '\regsvr32.exe'
              - '\rundll32.exe'
              - '\wscript.exe'
        - OriginalFileName:
              - 'Cmd.Exe'
              - 'cscript.exe'
              - 'mshta.exe'
              - 'PowerShell.EXE'
              - 'pwsh.dll'
              - 'regsvr32.exe'
              - 'RUNDLL32.EXE'
              - 'wscript.exe'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium