| Event Source: | Microsoft Windows Security Auditing |
| Event ID: | 4891 (0x131B) |
| Event log: | Security |
| Event type: | Information |
| Event text (English): | A configuration entry changed in Certificate Services. Node: %1 Entry: %2 Value: %3 |
| Event text (German): | A configuration entry in the certificate services has been changed. Node: %1 Entry: %2 Value: %3 |
Parameter
The parameters contained in the event text are filled with the following fields:
- %1: Node (win:UnicodeString)
- %2: Entry (win:UnicodeString)
- %3: Value (win:UnicodeString)
- %4: SubjectUserSid (win:SID)
- %5: SubjectUserName (win:UnicodeString)
- %6: SubjectDomainName (win:UnicodeString)
- %7: SubjectLogonId (win:HexInt64)
In contrast to operational events, which are often understood under the term "monitoring", auditing for the certification authority is the configuration of logging of security-relevant events.
Description
Do you know TameMyCerts? TameMyCerts is an add-on for the Microsoft certification authority (Active Directory Certificate Services). It extends the function of the certification authority and enables the Application of regulationsto realize the secure automation of certificate issuance. TameMyCerts is unique in the Microsoft ecosystem, has already proven itself in countless companies around the world and is available under a free license. It can downloaded via GitHub and can be used free of charge. Professional maintenance is also offered.
No description has been written for this yet.
Safety assessment
The security assessment is based on the three dimensions of confidentiality, integrity and availability.
It is rather unlikely that a registry change will be made by an attacker. Since the attacker must already have administrative rights, there would be easier ways to cause further damage. A configuration change is more likely, but this should have been notified in advance.
Microsoft rating
Microsoft evaluates this event in the Securing Public Key Infrastructure (PKI) Whitepaper with a severity rating of "Medium".
The reasoning behind this is:
Can be used to monitor for changes to Policy/Exit modules on the CA or configuration of CDP/AIA extensions.
Related links:
- Overview of audit events generated by the Certification Authority
- Overview of the audit events generated by the online responder (OCSP)
External sources
- Securing Public Key Infrastructure (PKI) (Microsoft)
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