yugoslavskiy
39 lines
1.2 KiB
YAML
39 lines
1.2 KiB
YAML
title: Suspicious Encoded PowerShell Command Line
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id: ca2092a1-c273-4878-9b4b-0d60115bf5ea
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description: Detects suspicious powershell process starts with base64 encoded commands (e.g. Emotet)
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status: experimental
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references:
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- https://app.any.run/tasks/6217d77d-3189-4db2-a957-8ab239f3e01e
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author: Florian Roth, Markus Neis, Jonhnathan Ribeiro, Daniil Yugoslavskiy, oscd.community
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date: 2018/09/03
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modified: 2020/12/01
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tags:
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- attack.execution
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- attack.t1059.001
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- attack.t1086 # an old one
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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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CommandLine|contains: '-e' # covers -en and -enc
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selection2:
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CommandLine|contains: 'JAB'
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selection3:
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CommandLine|contains|all:
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- ' -w'
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- 'hidden'
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selection4:
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CommandLine|contains:
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- ' BA^J'
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- ' SUVYI'
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- ' SQBFAFgA'
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- ' aQBlAHgA'
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- ' aWV4I'
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falsepositive1:
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CommandLine|contains|all:
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- ' -ExecutionPolicy'
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- 'remotesigned '
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condition: (selection and selection2) or (selection2 and selection3) or (selection and selection4) and not falsepositive1
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level: high
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