Disable Windows Event Logging Via Registry

Severity: high
Author: frack113, Nasreddine Bencherchali (Nextron Systems)
Source: upstream

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

MITRE ATT&CK coverage

Tactic	Techniques
Defense Evasion	`T1562.002` Impair Defenses: Disable Windows Event Logging

Event coverage

Provider	Event ID	Title
Sysmon	13	RegistryEvent (Value Set)

Stages and Predicates

Stage 1: `selection`

Details: 'DWORD (0x00000000)'
TargetObject|endswith: '\Enabled'
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\'

Stage 2: `not 1 of filter_main_*`

or:
or:
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-ASN1\'
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-CAPI2/Operational\'
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-FileInfoMinifilter'
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Kernel-AppCompat\'
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Runtime\Error\'
Image: 'C:\Windows\System32\svchost.exe'
Image|endswith: '\TiWorker.exe'
Image|startswith: 'C:\Windows\winsxs\'
Image: 'C:\Windows\servicing\TrustedInstaller.exe'
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Compat-Appraiser'
Image: 'C:\Windows\system32\wevtutil.exe'

Stage 3: `not 1 of filter_optional_*`

or:
Image: ''
Image: null

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`Details`	eq	`DWORD (0x00000000)` corpus 38 (sigma 38)
`Image`	ends_with	`\TiWorker.exe` corpus 7 (sigma 7)
`Image`	eq	`C:\Windows\System32\svchost.exe` corpus 4 (sigma 4) `C:\Windows\servicing\TrustedInstaller.exe` corpus 3 (sigma 3) `C:\Windows\system32\wevtutil.exe` corpus 2 (sigma 2)
`Image`	starts_with	`C:\Windows\winsxs\`
`TargetObject`	ends_with	`\Enabled` corpus 2 (sigma 2)
`TargetObject`	match	`\Microsoft\Windows\CurrentVersion\WINEVT\Channels\` corpus 2 (sigma 2) `\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-ASN1\` `\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-CAPI2/Operational\` `\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Compat-Appraiser` `\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-FileInfoMinifilter` `\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Kernel-AppCompat\` `\Microsoft\Windows\CurrentVersion\WINEVT\Channels\Microsoft-Windows-Runtime\Error\`