40 lines
1.3 KiB
YAML
40 lines
1.3 KiB
YAML
title: Suspicious PowerShell Command Line
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author: Teymur Kheirkhabarov (idea), Vasiliy Burov (rule), oscd.community
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date: 2020/10/15
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description: Detects the PowerShell command lines with special characters
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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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Image: '*\powershell.exe'
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SELECTION_3:
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CommandLine|re: .*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*\+.*
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SELECTION_4:
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CommandLine|re: .*\{.*\{.*\{.*\{.*\{.*\{.*\{.*\{.*\{.*\{.*
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SELECTION_5:
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CommandLine|re: .*{.*{.*{.*{.*{.*
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SELECTION_6:
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CommandLine|re: .*\^.*\^.*\^.*\^.*\^.*
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SELECTION_7:
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CommandLine|re: .*`.*`.*`.*`.*`.*
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condition: (SELECTION_1 and SELECTION_2 and (SELECTION_3 or SELECTION_4 or SELECTION_5
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or SELECTION_6 or SELECTION_7))
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falsepositives:
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- Unlikely
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id: d7bcd677-645d-4691-a8d4-7a5602b780d1
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level: high
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logsource:
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category: process_creation
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product: windows
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references:
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- https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=64
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1027
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- attack.execution
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- attack.t1059.001
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yml_filename: win_powershell_cmdline_special_characters.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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