Suspicious PFX File Creation

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About the rule

Rule Type

Standard

Rule Description

A general detection for processes creating PFX files. This could be an indicator of an adversary exporting a local certificate to a PFX file.

Severity

Trouble

Rule Requirement

Criteria

Action1: actionname = "File Created or Modified" AND (FILENAME endswith ".pfx" OR OBJECTNAME endswith ".pfx") AND ((FILENAME notcontains "\Templates\Windows\Windows_TemporaryKey.pfx" OR FILENAME notcontains "\CMake") AND (OBJECTNAME notcontains "\Templates\Windows\Windows_TemporaryKey.pfx" OR OBJECTNAME notcontains "\CMake")) select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.FILENAME,Action1.PROCESSNAME

Detection

Execution Mode

realtime

Log Sources

Windows

Author

Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)