54 lines
1.5 KiB
YAML
54 lines
1.5 KiB
YAML
title: Shells Spawned by Web Servers
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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_10:
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Image: '*\bash.exe'
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SELECTION_11:
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Image: '*\powershell.exe'
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SELECTION_12:
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Image: '*\bitsadmin.exe'
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SELECTION_2:
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ParentImage: '*\w3wp.exe'
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SELECTION_3:
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ParentImage: '*\httpd.exe'
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SELECTION_4:
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ParentImage: '*\nginx.exe'
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SELECTION_5:
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ParentImage: '*\php-cgi.exe'
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SELECTION_6:
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ParentImage: '*\tomcat.exe'
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SELECTION_7:
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ParentImage: '*\UMWorkerProcess.exe'
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SELECTION_8:
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Image: '*\cmd.exe'
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SELECTION_9:
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Image: '*\sh.exe'
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condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3 or SELECTION_4 or SELECTION_5
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or SELECTION_6 or SELECTION_7) and (SELECTION_8 or SELECTION_9 or SELECTION_10
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or SELECTION_11 or SELECTION_12))
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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: 2020/03/25
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status: experimental
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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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yml_filename: win_webshell_spawn.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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