Failed Code Integrity Checks — Sigma Rule

Rule metadata and linked tags

Author: Thomas Patzke. Source status: stable; severity: informational. Source dates: 2019-12-03 / 2025-01-19.

{
  "product": "windows",
  "service": "security"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: fbe43e46701a13a2a9c8e1c16915875f241e1de62ddb0b7d15d0563cc6d3af8e

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: Failed Code Integrity Checks
id: 470ec5fa-7b4e-4071-b200-4c753100f49b
status: stable
description: |
    Detects code integrity failures such as missing page hashes or corrupted drivers due unauthorized modification. This could be a sign of tampered binaries.
references:
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-5038
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-6281
author: Thomas Patzke
date: 2019-12-03
modified: 2025-01-19
tags:
    - attack.stealth
    - attack.t1027.001
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID:
            - 5038
            - 6281
    filter_optional_crowdstrike:
        param1|contains:
            - '\CSFalconServiceUninstallTool_'
            - '\Program Files\CrowdStrike\'
            - '\System32\drivers\CrowdStrike\'
            - '\Windows\System32\ScriptControl64_'
    filter_optional_sophos:
        param1|contains: '\Program Files\Sophos\'
    condition: selection and not 1 of filter_optional_*
falsepositives:
    - Disk device errors
level: informational

Original YAML and metadata in JSON

False positives

• Disk device errors

Source references

• https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-5038
• https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-10/security/threat-protection/auditing/event-6281