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registry_set_persistence_event_viewer_events_asp.yml
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registry_set_persistence_event_viewer_events_asp.yml
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title: Potential Persistence Via Event Viewer Events.asp
id: a1e11042-a74a-46e6-b07c-c4ce8ecc239b
status: test
description: Detects potential registry persistence technique using the Event Viewer "Events.asp" technique
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
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023/02/17
modified: 2023/03/05
tags:
- attack.persistence
- attack.defense_evasion
- attack.t1112
logsource:
category: registry_set
product: windows
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_*
falsepositives:
- Unknown
level: medium