Detection rules › Splunk
Windows Steal Authentication Certificates Certificate Issued
The following analytic identifies the issuance of a new certificate by Certificate Services - AD CS, detected via Event ID 4887. This event logs the requester user context, DNS hostname of the requesting machine, and the request time. Monitoring this activity is crucial as it can indicate potential misuse of authentication certificates. If confirmed malicious, an attacker could use the issued certificate to impersonate users, escalate privileges, or maintain persistence within the environment. This detection helps in identifying and correlating suspicious certificate-related activities for further investigation.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access | T1649 Steal or Forge Authentication Certificates |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Security-Auditing | 4887 | Certificate Services approved a certificate request and issued a certificate. |
Stages and Predicates
Stage 1: search
search EventCode=4887
Stage 2: stats
stats BY dest, name, Requester, action, Attributes, Subject
Stage 3: search
search
Stage 4: search
search
Stage 5: search
search `macro`
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
EventCode | eq |
|