Detectionmediumtest

Suspicious X509Enrollment - Ps Script

Detect use of X509Enrollment

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

François HubautCreated Fri Dec 23504d63cb-0dba-4d02-8531-e72981aace2cwindows

Log Source

WindowsPowerShell Script

ProductWindows← raw: windows

CategoryPowerShell Script← raw: ps_script

Definition

Requirements: Script Block Logging must be enabled

Detection Logic

detection:
    selection:
        ScriptBlockText|contains:
            - 'X509Enrollment.CBinaryConverter'
            - '884e2002-217d-11da-b2a4-000e7bbb2b09'
    condition: selection

False Positives

Legitimate administrative script

References

MITRE ATT&CK

Tactics

TA0005 · Defense Evasion

Sub-techniques

T1553.004 · Install Root Certificate

Related Rules

SimilarDetectionmedium

Suspicious X509Enrollment - Process Creation

Detect use of X509Enrollment

Detects similar activity. Both rules may fire on overlapping events.

Rule Metadata

Rule ID

504d63cb-0dba-4d02-8531-e72981aace2c

Status

test

Level

medium

Type

Detection

Created

Fri Dec 23

Author

François Hubaut

Path

rules/windows/powershell/powershell_script/posh_ps_x509enrollment.yml

Raw Tags

attack.defense-evasionattack.t1553.004

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