Suspicious IE Change Domain Zone (via registry_set)

title: Suspicious IE Change Domain Zone (via registry_set)
id: efcc3a6f-4753-5d81-8082-6e7f708d899d
status: stable
description: This rule detects hides the file extension through modification of the registry
references:
    - https://attack.mitre.org/techniques/T1137/
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1112/T1112.md#atomic-test-4---add-domain-to-trusted-sites-zone
    - https://learn.microsoft.com/en-us/troubleshoot/developer/browsers/security-privacy/ie-security-zones-registry-entries
author: Huntrule Team
date: 2026-01-21
tags:
    - attack.persistence
    - attack.t1137
logsource:
    category: registry_set
    product: windows
detection:
    selection_domains:
        TargetObject|contains: \SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\
    filter:
        Details:
            - DWORD (0x00000000)
            - DWORD (0x00000001)
            - '(Empty)'
    condition: selection_domains and not filter
falsepositives:
    - Unknown
level: medium
regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_change_security_zones/info.yml
simulation:
    - type: atomic-red-team
      name: Add Domain to Trusted Sites Zone
      technique: T1112
      atomic_guid: cf447677-5a4e-4937-a82c-e47d254afd57