david-syk
37 lines
1.1 KiB
YAML
37 lines
1.1 KiB
YAML
title: Chopper Webshell Process Pattern
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id: fa3c117a-bc0d-416e-a31b-0c0e80653efb
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status: test
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description: Detects patterns found in process executions cause by China Chopper like tiny (ASPX) webshells
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references:
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- https://www.microsoft.com/security/blog/2022/09/30/analyzing-attacks-using-the-exchange-vulnerabilities-cve-2022-41040-and-cve-2022-41082/
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author: Florian Roth (Nextron Systems), MSTI (query)
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date: 2022-10-01
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tags:
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- attack.persistence
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- attack.discovery
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- attack.t1505.003
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- attack.t1018
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- attack.t1033
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- attack.t1087
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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_origin:
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- Image|endswith: '\w3wp.exe'
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- ParentImage|endswith: '\w3wp.exe'
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selection_cmdline:
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CommandLine|contains:
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- '&ipconfig&echo'
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- '&quser&echo'
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- '&whoami&echo'
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- '&c:&echo'
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- '&cd&echo'
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- '&dir&echo'
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- '&echo [E]'
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- '&echo [S]'
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condition: all of selection_*
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falsepositives:
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- Unknown
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level: high
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