44 lines
978 B
YAML
44 lines
978 B
YAML
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title: Shells Spawned by Web Servers
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ruletype: Sigma
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author: Thomas Patzke
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date: 2019/01/16
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description: Web servers that spawn shell processes could be the result of a successfully
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placed web shell or an other attack
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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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ParentImage:
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- '*\w3wp.exe'
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- '*\httpd.exe'
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- '*\nginx.exe'
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- '*\php-cgi.exe'
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- '*\tomcat.exe'
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- '*\UMWorkerProcess.exe'
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SELECTION_3:
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Image:
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- '*\cmd.exe'
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- '*\sh.exe'
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- '*\bash.exe'
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- '*\powershell.exe'
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- '*\bitsadmin.exe'
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condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
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falsepositives:
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- Particular web applications may spawn a shell process legitimately
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fields:
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- CommandLine
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- ParentCommandLine
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id: 8202070f-edeb-4d31-a010-a26c72ac5600
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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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modified: 2021/11/27
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status: test
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tags:
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- attack.persistence
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- attack.t1505.003
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- attack.privilege_escalation
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- attack.t1190
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