Creation or Modification of Root Certificate
editCreation or Modification of Root Certificate
editIdentifies the creation or modification of a local trusted root certificate in Windows. The install of a malicious root certificate would allow an attacker the ability to masquerade malicious files as valid signed components from any entity (e.g. Microsoft). It could also allow an attacker to decrypt SSL traffic.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: low
Risk score: 21
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
- Defense Evasion
Version: 2 (version history)
Added (Elastic Stack release): 7.12.0
Last modified (Elastic Stack release): 8.2.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positives
editCertain applications may install root certificates for the purpose of inspecting SSL traffic.
Investigation guide
edit## Config If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
Rule query
editregistry where event.type in ("creation", "change") and registry.path : ( "HKLM\\Software\\Microsoft\\SystemCertific ates\\Root\\Certificates\\*\\Blob", "HKLM\\Software\\Microsoft\\ SystemCertificates\\AuthRoot\\Certificates\\*\\Blob", "HKLM\\Sof tware\\Policies\\Microsoft\\SystemCertificates\\Root\\Certificates\\*\ \Blob", "HKLM\\Software\\Policies\\Microsoft\\SystemCertificates \\AuthRoot\\Certificates\\*\\Blob" )
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Subvert Trust Controls
- ID: T1553
- Reference URL: https://attack.mitre.org/techniques/T1553/
Rule version history
edit- Version 2 (8.2.0 release)
-
- Formatting only