Sigma rule: Potential Persistence Via Event Viewer Events.asp

Rule

Title

Potential Persistence Via Event Viewer Events.asp

Status

test

Level

medium

Author

Nasreddine Bencherchali (Nextron Systems)

Date

2023-02-17

Modified

2023-03-05

File

rules/windows/registry/registry_set/registry_set_persistence_event_viewer_events_asp.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects potential registry persistence technique using the Event Viewer "Events.asp" technique

Log source

product

windows

category

registry_set

Detection

selection:
    # Covers both "\Policies\" and "\Software\" paths for both "Machine" and "User" level configs
    # Also "MicrosoftRedirectionProgramCommandLineParameters" key
    TargetObject|contains:
        - '\Microsoft\Windows NT\CurrentVersion\Event Viewer\MicrosoftRedirectionProgram'
        - '\Microsoft\Windows NT\CurrentVersion\Event Viewer\MicrosoftRedirectionURL'
filter_default_redirect_program:
    Image|endswith: 'C:\WINDOWS\system32\svchost.exe' # Set via GPO
    TargetObject|endswith: '\Microsoft\Windows NT\CurrentVersion\Event Viewer\MicrosoftRedirectionProgram'
    Details: '%%SystemRoot%%\PCHealth\HelpCtr\Binaries\HelpCtr.exe'
filter_default_redirect_program_cli:
    Image|endswith: 'C:\WINDOWS\system32\svchost.exe' # Set via GPO
    TargetObject|endswith: '\Microsoft\Windows NT\CurrentVersion\Event Viewer\MicrosoftRedirectionProgramCommandLineParameters'
    Details: '-url hcp://services/centers/support?topic=%%s'
filter_url:
    Details: 'http://go.microsoft.com/fwlink/events.asp'
filter_cleaner:
    Details: '(Empty)'
condition: selection and not 1 of filter_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.persistence
• attack.defense-impairment
• attack.t1112

MITRE ATT&CK ids this rule names

• T1112

References

• https://twitter.com/nas_bench/status/1626648985824788480
• https://admx.help/?Category=Windows_7_2008R2&Policy=Microsoft.Policies.InternetCommunicationManagement::EventViewer_DisableLinks
• https://www.hexacorn.com/blog/2019/02/15/beyond-good-ol-run-key-part-103/
• https://github.com/redcanaryco/atomic-red-team/blob/f296668303c29d3f4c07e42bdd2b28d8dd6625f9/atomics/T1112/T1112.md

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/registry/registry_set/registry_set_persistence_event_viewer_events_asp.yml