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Detection rules › Sigma

Antivirus Filter Driver Disallowed On Dev Drive - Registry

Status
test
Severity
high
Log source
category registry_set, product windows
Author
@kostastsale, Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects activity that indicates a user disabling the ability for Antivirus mini filter to inspect a "Dev Drive".

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
Defense Impairment

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 13: RegistryEvent (Value Set)

Rule body

title: Antivirus Filter Driver Disallowed On Dev Drive - Registry
id: 31e124fb-5dc4-42a0-83b3-44a69c77b271
status: test
description: |
    Detects activity that indicates a user disabling the ability for Antivirus mini filter to inspect a "Dev Drive".
references:
    - https://twitter.com/0gtweet/status/1720419490519752955
author: '@kostastsale, Nasreddine Bencherchali (Nextron Systems)'
date: 2023-11-05
modified: 2024-08-16
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|endswith: '\FilterManager\FltmgrDevDriveAllowAntivirusFilter'
        Details: 'DWORD (0x00000000)'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    TargetObject|endswith: '\FilterManager\FltmgrDevDriveAllowAntivirusFilter'
    Details: 'DWORD (0x00000000)'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Detailseq
  • DWORD (0x00000000) corpus 38 (sigma 36, chronicle 2)
field:"Details" kind:eq value:"DWORD (0x00000000)"
TargetObjectends_with
  • \FilterManager\FltmgrDevDriveAllowAntivirusFilter
field:"TargetObject" kind:ends_with value:"\FilterManager\FltmgrDevDriveAllowAntivirusFilter"