sigmamediumHunting

Potentially Suspicious Child Process Of DiskShadow.EXE

Detects potentially suspicious child processes of "Diskshadow.exe". This could be an attempt to bypass parent/child relationship detection or application whitelisting rules.

MITRE ATT&CK

T1218

defense-evasion

Detection Query

selection:
  ParentImage|endswith: \diskshadow.exe
  Image|endswith:
    - \certutil.exe
    - \cscript.exe
    - \mshta.exe
    - \powershell.exe
    - \pwsh.exe
    - \regsvr32.exe
    - \rundll32.exe
    - \wscript.exe
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-09-15

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1218

Raw Content

title: Potentially Suspicious Child Process Of DiskShadow.EXE
id: 9f546b25-5f12-4c8d-8532-5893dcb1e4b8
related:
    - id: fa1a7e52-3d02-435b-81b8-00da14dd66c1 # Diskshadow Script Mode - Execution From Potential Suspicious Location
      type: similar
    - id: 1dde5376-a648-492e-9e54-4241dd9b0c7f # Diskshadow Script Mode - Uncommon Script Extension Execution
      type: similar
    - id: 56b1dde8-b274-435f-a73a-fb75eb81262a # Diskshadow Child Process Spawned
      type: similar
    - id: 0c2f8629-7129-4a8a-9897-7e0768f13ff2 # Diskshadow Script Mode Execution
      type: similar
status: test
description: Detects potentially suspicious child processes of "Diskshadow.exe". This could be an attempt to bypass parent/child relationship detection or application whitelisting rules.
references:
    - https://bohops.com/2018/03/26/diskshadow-the-return-of-vss-evasion-persistence-and-active-directory-database-extraction/
    - https://www.ired.team/offensive-security/credential-access-and-credential-dumping/ntds.dit-enumeration
    - https://medium.com/@cyberjyot/lolbin-execution-via-diskshadow-f6ff681a27a4
    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/diskshadow
    - https://www.lifars.com/wp-content/uploads/2022/01/GriefRansomware_Whitepaper-2.pdf
    - https://www.zscaler.com/blogs/security-research/technical-analysis-crytox-ransomware
    - https://research.checkpoint.com/2022/evilplayout-attack-against-irans-state-broadcaster/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-09-15
tags:
    - attack.defense-evasion
    - attack.t1218
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\diskshadow.exe'
        Image|endswith:
            # Note: add or remove additional binaries according to your org needs
            - '\certutil.exe'
            - '\cscript.exe'
            - '\mshta.exe'
            - '\powershell.exe'
            - '\pwsh.exe'
            - '\regsvr32.exe'
            - '\rundll32.exe'
            - '\wscript.exe'
    condition: selection
falsepositives:
    - False postitve can occur in cases where admin scripts levreage the "exec" flag to execute applications
level: medium