Abusing PowerShell to Disable Defender Components

 1title: Abusing PowerShell to Disable Defender Components
 2id: 32cfafc8-fbdc-43e0-a2cd-11b99630d270
 3status: experimental
 4description: Looks for instances of powershell being used to disable or impair Windows
 5    Defender functionality. Inspired by the 2022 Red Canary Threat Detection report.
 6references:
 7    - https://redcanary.com/threat-detection-report/techniques/disable-or-modify-tools/
 8author: Micah Babinski
 9date: 2022/11/04
10tags:
11    - attack.defense_evasion
12    - attack.t1562
13    - attack.t1562.001
14    - attack.t1562.004
15logsource:
16    category: process_creation
17    product: windows
18detection:
19    selection:
20        CommandLine|contains: 'Set-MpPreference'
21        Image|endswith: '\powershell.exe'
22    selection2:
23        CommandLine|contains:
24            - 'disablerealtimemonitoring'
25            - 'disableioavprotection'
26            - 'disablebehaviormonitoring'
27            - 'disableintrusionpreventionsystem'
28            - 'exclusionprocess'
29            - 'disablescriptscanning'
30    condition: selection and selection2
31falsepositives:
32    - Unknown
33level: high```