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33 lines
1.1 KiB
YAML
33 lines
1.1 KiB
YAML
title: Powershell Defender Exclusion
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id: 17769c90-230e-488b-a463-e05c08e9d48f
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status: experimental
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description: Detects requests to exclude files, folders or processes from Antivirus scanning using PowerShell cmdlets
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references:
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- https://docs.microsoft.com/en-us/microsoft-365/security/defender-endpoint/configure-process-opened-file-exclusions-microsoft-defender-antivirus
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tags:
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- attack.defense_evasion
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- attack.t1562.001
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author: Florian Roth
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date: 2021/04/29
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logsource:
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category: process_creation
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product: windows
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detection:
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selection1:
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CommandLine: 'Add-MpPreference'
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selection2:
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CommandLine|contains:
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- ' -ExclusionPath '
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- ' -ExclusionExtension '
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- ' -ExclusionProcess '
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selection_encoded:
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CommandLine|contains:
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- 'QWRkLU1wUHJlZmVyZW5jZ'
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- 'FkZC1NcFByZWZlcmVuY2'
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- 'BZGQtTXBQcmVmZXJlbmNl'
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condition: ( selection1 and selection2 ) or selection_encoded
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falsepositives:
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- Possible Admin Activity
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- Other Cmdlets that may use the same parameters
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level: high
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