This documentation contains work-in-progress information for future Elastic Stack and Cloud releases. Use the version selector to view supported release docs. It also contains some Elastic Cloud serverless information. Check out our serverless docs for more details.
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.*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: None
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: 4
Rule authors:
- Elastic
Rule license: Elastic License v2
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\\*\\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")
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/
-
Sub-technique:
- Name: Component Object Model Hijacking
- ID: T1546.015
- Reference URL: https://attack.mitre.org/techniques/T1546/015/