Suspicious ISO Image Mounted (via security)

title: Suspicious ISO Image Mounted (via security)
id: d6dc40a9-6922-5d49-9502-789da472f35d
status: stable
description: This rule detects the mount of an ISO image on an endpoint
references:
    - https://attack.mitre.org/techniques/T1566/001/
    - https://www.trendmicro.com/vinfo/hk-en/security/news/cybercrime-and-digital-threats/malicious-spam-campaign-uses-iso-image-files-to-deliver-lokibot-and-nanocore
    - https://www.proofpoint.com/us/blog/threat-insight/threat-actor-profile-ta2719-uses-colorful-lures-deliver-rats-local-languages
    - https://twitter.com/MsftSecIntel/status/1257324139515269121
    - https://github.com/redcanaryco/atomic-red-team/blob/0f229c0e42bfe7ca736a14023836d65baa941ed2/atomics/T1553.005/T1553.005.md#atomic-test-1---mount-iso-image
author: Huntrule Team
date: 2026-07-02
tags:
    - attack.initial-access
    - attack.t1566.001
logsource:
    product: windows
    service: security
    definition: 'The advanced audit policy setting "Object Access > Audit Removable Storage" must be configured for Success/Failure'
detection:
    selection:
        EventID: 4663
        ObjectServer: 'Security'
        ObjectType: 'File'
        ObjectName|startswith: '\Device\CdRom'
    filter_main_generic:
        ObjectName:
            - '\Device\CdRom0\autorun.ico'
            - '\Device\CdRom0\setup.exe'
            - '\Device\CdRom0\setup64.exe'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium