36 lines
926 B
YAML
36 lines
926 B
YAML
title: Encoded FromBase64String
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author: Florian Roth
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date: 2019/08/24
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description: Detects a base64 encoded FromBase64String keyword in a process command
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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: '*OjpGcm9tQmFzZTY0U3RyaW5n*'
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SELECTION_3:
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CommandLine: '*o6RnJvbUJhc2U2NFN0cmluZ*'
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SELECTION_4:
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CommandLine: '*6OkZyb21CYXNlNjRTdHJpbm*'
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condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3 or SELECTION_4))
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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: fdb62a13-9a81-4e5c-a38f-ea93a16f6d7c
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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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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1140
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- attack.execution
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- attack.t1059.001
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- attack.t1086
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yml_filename: win_encoded_frombase64string.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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