Certificate Exported From Local Certificate Store — Sigma Rule

Rule metadata and linked tags

Author: Zach Mathis. Source status: test; severity: medium. Source dates: 2023-05-13 / not supplied.

{
  "product": "windows",
  "service": "certificateservicesclient-lifecycle-system"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: eb9fb8115e0dabff3594771c9c65ad04de3c73f3418a12f0c996bad5eedc276d

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Certificate Exported From Local Certificate Store
id: 58c0bff0-40a0-46e8-b5e8-b734b84d2017
status: test
description: Detects when an application exports a certificate (and potentially the private key as well) from the local Windows certificate store.
references:
    - https://www.splunk.com/en_us/blog/security/breaking-the-chain-defending-against-certificate-services-abuse.html
author: Zach Mathis
date: 2023-05-13
tags:
    - attack.credential-access
    - attack.t1649
logsource:
    product: windows
    service: certificateservicesclient-lifecycle-system
detection:
    selection:
        EventID: 1007 # A certificate has been exported
    condition: selection
falsepositives:
    - Legitimate application requesting certificate exports will trigger this. Apply additional filters as needed
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate application requesting certificate exports will trigger this. Apply additional filters as needed

Source references

• https://www.splunk.com/en_us/blog/security/breaking-the-chain-defending-against-certificate-services-abuse.html