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MediumSplunk security contentSteven Dick

Detect Certify With PowerShell Script Block Logging

The following analytic detects the use of the Certify tool via an in-memory PowerShell function to enumerate Active Directory Certificate Services (AD CS) environments. It leverages PowerShell Script Block Logging…

Description

The following analytic detects the use of the Certify tool via an in-memory PowerShell function to enumerate Active Directory Certificate Services (AD CS) environments. It leverages PowerShell Script Block Logging (EventCode 4104) to identify specific command patterns associated with Certify's enumeration and exploitation functions. This activity is significant as it indicates potential reconnaissance or exploitation attempts against AD CS, which could lead to unauthorized certificate issuance. If confirmed malicious, attackers could leverage this to escalate privileges, persist in the environment, or access sensitive information by abusing AD CS.

Detection logic

Detection requirements

Platform
Identity ProviderLinuxmacOSWindows

The rule states no platform. This is derived from the 2 ATT&CK techniques it maps to.

Log source category
powershell_script_block_logging_4104

Known benign triggers

  • No false positives have been identified at this time.

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