IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Component Object Model Hijackingedit
Identifies Component Object Model (COM) hijacking via registry modification. Adversaries may establish persistence by executing malicious content triggered by hijacked references to COM objects.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Persistence
Version: 5 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 8.0.0
Rule authors: Elastic
Rule license: Elastic License v2
Rule queryedit
registry where /* uncomment once length is stable length(bytes_written_string) > 0 and */ (registry.path : "HK*}\\InprocServer32\\" and registry.data.strings: ("scrobj.dll", "C:\\*\\scrobj.dll") and not registry.path : "*\\{06290BD*-48AA-11D2-8432-006008C3FBFC}\\*") or /* in general COM Registry changes on Users Hive is less noisy and worth alerting */ (registry.path : ("HKEY_USERS\\*Classes\\*\\InprocServer32\\", "HKEY_USERS\\*Classes\\*\\LocalServer32\\", "HKEY_USERS\\*Classes\\*\\DelegateExecute\\", "HKEY_USERS\\*Classes\\*\\TreatAs\\", "HKEY_USERS\\*Classes\\CLSID\\*\\ScriptletURL\\") and not (process.executable : "?:\\Program Files*\\Veeam\\Backup and Replication\\Console\\veeam.backup.shell.exe" and registry.path : "HKEY_USERS\\S-1-5-21-*_Classes\\CLSID\\*\\LocalServer32\\") and /* not necessary but good for filtering privileged installations */ user.domain != "NT AUTHORITY")
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
-
Technique:
- Name: Event Triggered Execution
- ID: T1546
- Reference URL: https://attack.mitre.org/techniques/T1546/
Rule version historyedit
- Version 5 (8.0.0 release)
-
-
Updated query, changed from:
registry where /* uncomment once length is stable length(bytes_written_string) > 0 and */ (registry.path : "HK*}\\InprocServer32\\" and registry.data.strings: ("scrobj.dll", "C:\\*\\scrobj.dll") and not registry.path : "*\\{06290BD*-48AA-11D2-8432-006008C3FBFC}\\*") or /* in general COM Registry changes on Users Hive is less noisy and worth alerting */ (registry.path : ("HKEY_USERS\\*Classes\\*\\InprocServer32\\", "HKEY_USERS\\*Classes\\*\\LocalServer32\\", "HKEY_USERS\\*Classes\\*\\DelegateExecute\\", "HKEY_USERS\\*Classes\\*\\TreatAs\\", "HKEY_USERS\\*Classes\\CLSID\\*\\ScriptletURL\\") and /* not necessary but good for filtering privileged installations */ user.domain != "NT AUTHORITY")
-
- Version 4 (7.14.0 release)
-
-
Updated query, changed from:
registry where /* uncomment once length is stable length(bytes_written_string) > 0 and */ (registry.path : "HK*}\\InprocServer32\\" and registry.data.strings: ("scrobj.dll", "C:\\*\\scrobj.dll") and not registry.path : "*\\{06290BD*-48AA-11D2-8432-006008C3FBFC}\\*") or /* in general COM Registry changes on Users Hive is less noisy and worth alerting */ (registry.path : ("HKEY_USERS\\*Classes\\*\\InprocXServer32\\", "HKEY_USERS\\*Classes\\*\\LocalServer32\\", "HKEY_USERS\\*Classes\\*\\DelegateExecute\\", "HKEY_USERS\\*Classes\\*\\TreatAs\\", "HKEY_USERS\\*Classes\\CLSID\\*\\ScriptletURL\\") and /* not necessary but good for filtering privileged installations */ user.domain != "NT AUTHORITY")
-
- Version 3 (7.12.0 release)
-
- Formatting only
- Version 2 (7.11.2 release)
-
- Formatting only