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Detection rules › Sigma

CodeIntegrity - Unsigned Image Loaded

Status
test
Severity
high
Log source
product windows, service codeintegrity-operational
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects loaded unsigned image on the system

MITRE ATT&CK coverage

TacticTechniques
Privilege EscalationNo specific technique

Event coverage

ProviderEventTitle
CodeIntegrityEvent ID 3037Code Integrity determined an unsigned image FileNameBuffer is loaded into the system.

Rule body yaml

title: CodeIntegrity - Unsigned Image Loaded
id: c92c24e7-f595-493f-9c98-53d5142f5c18
status: test
description: Detects loaded unsigned image on the system
references:
    - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/operations/event-id-explanations
    - https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/operations/event-tag-explanations
    - Internal Research
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-06-06
tags:
    - attack.privilege-escalation
logsource:
    product: windows
    service: codeintegrity-operational
detection:
    selection:
        EventID: 3037 # Code Integrity determined an unsigned image %2 is loaded into the system. Check with the publisher to see if a signed version of the image is available.
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    EventID: 3037