frack113
33 lines
888 B
YAML
33 lines
888 B
YAML
title: Suspicious XOR Encoded PowerShell Command Line
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id: bb780e0c-16cf-4383-8383-1e5471db6cf9
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status: test
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description: Detects suspicious powershell process which includes bxor command, alternative obfuscation method to b64 encoded commands.
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author: Sami Ruohonen, Harish Segar (improvement)
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date: 2018/09/05
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modified: 2021/11/27
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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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selection:
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- Description: 'Windows PowerShell'
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- Product: 'PowerShell Core 6'
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filter:
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CommandLine|contains:
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- 'bxor'
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- 'join'
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- 'char'
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false_positives:
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ParentImage:
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- C:\Program Files\Amazon\SSM\ssm-document-worker.exe
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condition: selection and filter and not false_positives
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falsepositives:
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- unknown
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level: medium
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tags:
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- attack.defense_evasion
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- attack.t1086 # an old one
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- attack.t1059.001
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- attack.t1140
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- attack.t1027
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