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 Hijacking
editComponent Object Model Hijacking
editIdentifies 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.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Persistence
Version: 2 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 7.11.2
Rule authors: Elastic
Rule license: Elastic License
Rule query
editregistry 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")
Threat mapping
editFramework: 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 history
edit- Version 2 (7.11.2 release)
-
- Formatting only