41 lines
786 B
YAML
41 lines
786 B
YAML
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title: Encoded IEX
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ruletype: Sigma
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author: Florian Roth
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date: 2019/08/23
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description: Detects a base64 encoded IEX command string in a process command line
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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CommandLine:
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- '*SUVYIChb*'
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- '*lFWCAoW*'
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- '*JRVggKF*'
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- '*aWV4IChb*'
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- '*lleCAoW*'
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- '*pZXggKF*'
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- '*aWV4IChOZX*'
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- '*lleCAoTmV3*'
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- '*pZXggKE5ld*'
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- '*SUVYIChOZX*'
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- '*lFWCAoTmV3*'
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- '*JRVggKE5ld*'
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condition: (SELECTION_1 and SELECTION_2)
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falsepositives:
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- unknown
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fields:
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- CommandLine
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- ParentCommandLine
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id: 88f680b8-070e-402c-ae11-d2914f2257f1
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level: critical
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logsource:
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category: process_creation
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product: windows
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modified: 2021/11/27
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status: test
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tags:
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- attack.execution
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- attack.t1059.001
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- attack.t1086
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