COM Object Hijacking Via Modification Of Default System CLSID Default Value

Title: COM Object Hijacking Via Modification Of Default System CLSID Default Value
Status: experimental
Description:Detects potential COM object hijacking via modification of default system CLSID.
References:
  -https://www.microsoft.com/security/blog/2022/07/27/untangling-knotweed-european-private-sector-offensive-actor-using-0-day-exploits/ (idea)
  -https://unit42.paloaltonetworks.com/snipbot-romcom-malware-variant/
  -https://blog.talosintelligence.com/uat-5647-romcom/
  -https://global.ptsecurity.com/analytics/pt-esc-threat-intelligence/darkhotel-a-cluster-of-groups-united-by-common-techniques
  -https://threatbook.io/blog/Analysis-of-APT-C-60-Attack-on-South-Korea
  -https://catalyst.prodaft.com/public/report/inside-the-latest-espionage-campaign-of-nebulous-mantis
  -https://github.com/rtecCyberSec/BitlockMove
  -https://cert.gov.ua/article/6284080
  -https://securelist.com/forumtroll-apt-hacking-team-dante-spyware/117851/
Author: Nasreddine Bencherchali (Nextron Systems)
Date: 2024-07-16
modified:2025-11-10
Tags:

• -'attack.privilege-escalation'
• -'attack.persistence'
• -'attack.t1546.015'

Logsource:

• category: registry_set
• product: windows

Detection:
  selection_target_root:
    TargetObject|contains: '\CLSID\'
    TargetObject|endswith:
      -'\InprocServer32\(Default)'
      -'\LocalServer32\(Default)'

  selection_target_builtin_clsid:
    TargetObject|contains:
      -'\{1f486a52-3cb1-48fd-8f50-b8dc300d9f9d}\'
      -'\{2155fee3-2419-4373-b102-6843707eb41f}\'
      -'\{4590f811-1d3a-11d0-891f-00aa004b2e24}\'
      -'\{4de225bf-cf59-4cfc-85f7-68b90f185355}\'
      -'\{ddc05a5a-351a-4e06-8eaf-54ec1bc2dcea}\'
      -'\{F56F6FDD-AA9D-4618-A949-C1B91AF43B1A}\'
      -'\{F82B4EF1-93A9-4DDE-8015-F7950A1A6E31}\'
      -'\{7849596a-48ea-486e-8937-a2a3009f31a9}\'
      -'\{0b91a74b-ad7c-4a9d-b563-29eef9167172}\'
      -'\{603D3801-BD81-11d0-A3A5-00C04FD706EC}\'
      -'\{30D49246-D217-465F-B00B-AC9DDD652EB7}\'
      -'\{A7A63E5C-3877-4840-8727-C1EA9D7A4D50}\'
      -'\{2227A280-3AEA-1069-A2DE-08002B30309D}\'
      -'\{2DEA658F-54C1-4227-AF9B-260AB5FC3543}\'
      -'\{AA509086-5Ca9-4C25-8F95-589D3C07B48A}\'

  selection_susp_location_1:
    Details|contains:
      -':\Perflogs\'
      -'\AppData\Local\'
      -'\Desktop\'
      -'\Downloads\'
      -'\Microsoft\Windows\Start Menu\Programs\Startup\'
      -'\System32\spool\drivers\color\'
      -'\Temporary Internet'
      -'\Users\Public\'
      -'\Windows\Temp\'
      -'%appdata%'
      -'%temp%'
      -'%tmp%'

  selection_susp_location_2:
    - Details|contains|all:
      - ':\Users\'
      - '\Favorites\'
    - Details|contains|all:
      - ':\Users\'
      - '\Favourites\'
    - Details|contains|all:
      - ':\Users\'
      - '\Contacts\'
    - Details|contains|all:
      - ':\Users\'
      - '\Pictures\'
  condition:all of selection_target_* and 1 of selection_susp_location_*
Falsepositives:
  -Unlikely
Level: high