sigmahighHunting

Disable Windows Event Logging Via Registry

Detects tampering with the "Enabled" registry key in order to disable Windows logging of a Windows event channel

MITRE ATT&CK

defense-evasion

Detection Query

selection:
  TargetObject|contains: \Microsoft\Windows\CurrentVersion\WINEVT\Channels\
  TargetObject|endswith: \Enabled
  Details: DWORD (0x00000000)
filter_main_wevutil:
  Image: C:\Windows\system32\wevtutil.exe
filter_main_iis:
  Image|startswith: C:\Windows\winsxs\
  Image|endswith: \TiWorker.exe
filter_main_svchost:
  Image: C:\Windows\System32\svchost.exe
  TargetObject|contains:
    - \Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-FileInfoMinifilter
    - \Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-ASN1\
    - \Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Kernel-AppCompat\
    - \Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Runtime\Error\
    - \Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-CAPI2/Operational\
filter_main_trusted_installer:
  Image: C:\Windows\servicing\TrustedInstaller.exe
  TargetObject|contains: \Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Compat-Appraiser
filter_optional_empty:
  Image: ""
filter_optional_null:
  Image: null
condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*

Author

frack113, Nasreddine Bencherchali (Nextron Systems)

Created

2022-07-04

Data Sources

windowsRegistry Set Events

Platforms

windows

References

Tags

attack.defense-evasionattack.t1562.002

Raw Content

title: Disable Windows Event Logging Via Registry
id: 2f78da12-f7c7-430b-8b19-a28f269b77a3
status: test
description: Detects tampering with the "Enabled" registry key in order to disable Windows logging of a Windows event channel
references:
    - https://twitter.com/WhichbufferArda/status/1543900539280293889
    - https://github.com/DebugPrivilege/CPP/blob/c39d365617dbfbcb01fffad200d52b6239b2918c/Windows%20Defender/RestoreDefenderConfig.cpp
author: frack113, Nasreddine Bencherchali (Nextron Systems)
date: 2022-07-04
modified: 2024-03-25
tags:
    - attack.defense-evasion
    - attack.t1562.002
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\'
        TargetObject|endswith: '\Enabled'
        Details: 'DWORD (0x00000000)'
    filter_main_wevutil:
        Image: 'C:\Windows\system32\wevtutil.exe' # FP generated during installation of manifests via wevtutil
    filter_main_iis:
        Image|startswith: 'C:\Windows\winsxs\'
        Image|endswith: '\TiWorker.exe'  # Many different TargetObjects
    filter_main_svchost:
        Image: 'C:\Windows\System32\svchost.exe'
        TargetObject|contains:
            - '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-FileInfoMinifilter'
            - '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-ASN1\'
            - '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Kernel-AppCompat\'
            - '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Runtime\Error\'
            - '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-CAPI2/Operational\'
    filter_main_trusted_installer:
        Image: C:\Windows\servicing\TrustedInstaller.exe
        TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Compat-Appraiser'
    filter_optional_empty: # This filter is related to aurora. Should be removed when fix is deployed. # TODO: Remove later
        Image: ''
    filter_optional_null: # This filter is related to aurora. Should be removed when fix is deployed. # TODO: Remove later
        Image: null
    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
    - Rare falsepositives may occur from legitimate administrators disabling specific event log for troubleshooting
level: high