phantinuss
42 lines
963 B
YAML
42 lines
963 B
YAML
title: Encoded IEX
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id: 88f680b8-070e-402c-ae11-d2914f2257f1
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status: test
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description: Detects a base64 encoded IEX command string in a process command line
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author: Florian Roth
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date: 2019/08/23
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modified: 2022/03/07
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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|base64offset|contains:
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- 'IEX (['
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- 'iex (['
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- 'iex (New'
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- 'IEX (New'
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# UTF16 LE
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- CommandLine|contains:
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- 'SQBFAFgAIAAoAFsA'
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- 'kARQBYACAAKABbA'
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- 'JAEUAWAAgACgAWw'
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- 'aQBlAHgAIAAoAFsA'
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- 'kAZQB4ACAAKABbA'
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- 'pAGUAeAAgACgAWw'
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- 'aQBlAHgAIAAoAE4AZQB3A'
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- 'kAZQB4ACAAKABOAGUAdw'
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- 'pAGUAeAAgACgATgBlAHcA'
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- 'SQBFAFgAIAAoAE4AZQB3A'
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- 'kARQBYACAAKABOAGUAdw'
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- 'JAEUAWAAgACgATgBlAHcA'
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condition: selection
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fields:
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- CommandLine
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- ParentCommandLine
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falsepositives:
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- Unknown
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level: critical
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tags:
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- attack.execution
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- attack.t1059.001
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