Windows Defender Definition Files Removed

calendar Apr 28, 2026 · attack.defense-impairment attack.t1685  ·
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Adversaries may disable security tools to avoid possible detection of their tools and activities by removing Windows Defender Definition Files

Sigma rule (View on GitHub)

 1title: Windows Defender Definition Files Removed
 2id: 9719a8aa-401c-41af-8108-ced7ec9cd75c
 3status: test
 4description: Adversaries may disable security tools to avoid possible detection of their tools and activities by removing Windows Defender Definition Files
 5references:
 6    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.001/T1562.001.md
 7    - https://unit42.paloaltonetworks.com/unit42-gorgon-group-slithering-nation-state-cybercrime/
 8author: frack113
 9date: 2021-07-07
10modified: 2023-07-18
11tags:
12    - attack.defense-impairment
13    - attack.t1685
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection_img:
19        - Image|endswith: '\MpCmdRun.exe'
20        - OriginalFileName: MpCmdRun.exe
21    selection_cli:
22        CommandLine|contains|all:
23            - ' -RemoveDefinitions'
24            - ' -All'
25    condition: all of selection_*
26falsepositives:
27    - Unknown
28level: high

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