Elastic Security Detection Rules

Code Signing Policy Modification Through Registry

Last updated 5 months ago on 2025-03-20
Created 3 years ago on 2023-01-31

About

Identifies attempts to disable the code signing policy through the registry. Code signing provides authenticity on a program, and grants the user with the ability to check whether the program has been tampered with. By allowing the execution of unsigned or self-signed code, threat actors can craft and execute malicious code.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: Defense EvasionData Source: Elastic EndgameData Source: Elastic DefendData Source: SysmonData Source: Microsoft Defender for EndpointData Source: SentinelOneLanguage: eql
Severity
medium
Risk Score
47
MITRE ATT&CK™

Defense Evasion (TA0005)(opens in a new tab or window)

↳ Modify Registry (T1112)(opens in a new tab or window)

↳ Subvert Trust Controls (T1553)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
winlogbeat-*logs-endpoint.events.registry-*logs-windows.sysmon_operational-*endgame-*logs-m365_defender.event-*logs-sentinel_one_cloud_funnel.*
Related Integrations

endpoint(opens in a new tab or window)

windows(opens in a new tab or window)

m365_defender(opens in a new tab or window)

sentinel_one_cloud_funnel(opens in a new tab or window)

Query
registry where host.os.type == "windows" and event.type == "change" and
  registry.value: "BehaviorOnFailedVerify" and registry.data.strings : ("0", "0x00000000", "1", "0x00000001")

  /*
    Full registry key path omitted due to data source variations:
    "HKEY_USERS\\*\\Software\\Policies\\Microsoft\\Windows NT\\Driver Signing\\BehaviorOnFailedVerify"
  */

Install detection rules in Elastic Security

Detect Code Signing Policy Modification Through Registry in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).