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42 lines
1004 B
YAML
42 lines
1004 B
YAML
action: global
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title: Invoke-Obfuscation COMPRESS OBFUSCATION
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id: 175997c5-803c-4b08-8bb0-70b099f47595
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description: Detects Obfuscated Powershell via COMPRESS OBFUSCATION
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status: experimental
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author: Timur Zinniatullin, oscd.community
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date: 2020/10/18
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references:
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- https://github.com/Neo23x0/sigma/issues/1009 #(Task 19)
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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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falsepositives:
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- unknown
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level: medium
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detection:
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selection_1:
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- ImagePath|re: '(?i).*new-object.*(?:system\.io\.compression\.deflatestream|system\.io\.streamreader).*text\.encoding\]::ascii.*readtoend'
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condition: selection and selection_1
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---
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logsource:
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product: windows
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service: system
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detection:
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selection:
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EventID: 7045
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---
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logsource:
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product: windows
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service: sysmon
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detection:
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selection:
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EventID: 6
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---
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logsource:
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product: windows
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service: security
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detection:
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selection:
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EventID: 4697 |