phantinuss
55 lines
1.6 KiB
YAML
55 lines
1.6 KiB
YAML
title: Shells Spawned by Web Servers
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id: 8202070f-edeb-4d31-a010-a26c72ac5600
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status: test
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description: Web servers that spawn shell processes could be the result of a successfully placed web shell or an other attack
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author: Thomas Patzke, Florian Roth
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date: 2019/01/16
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modified: 2022/03/17
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tags:
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- attack.persistence
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- attack.t1505.003
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- attack.t1190
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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_webserver_image:
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ParentImage|endswith:
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- '\w3wp.exe'
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- '\php-cgi.exe'
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- '\nginx.exe'
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- '\httpd.exe'
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- '\caddy.exe'
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- '\ws_TomcatService.exe'
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- '\tomcat.exe'
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- '\UMWorkerProcess.exe' # https://www.fireeye.com/blog/threat-research/2021/03/detection-response-to-exploitation-of-microsoft-exchange-zero-day-vulnerabilities.html
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selection_webserver_characteristics_tomcat1:
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ParentImage|endswith:
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- '\java.exe'
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- '\javaw.exe'
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ParentImage|contains:
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- '-tomcat-'
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- '\tomcat'
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selection_webserver_characteristics_tomcat2:
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ParentImage|endswith:
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- '\java.exe'
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- '\javaw.exe'
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CommandLine|contains:
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- 'catalina.jar'
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- 'CATALINA_HOME'
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anomaly_children:
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Image|endswith:
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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: 1 of selection* and anomaly_children
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fields:
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- CommandLine
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- ParentCommandLine
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falsepositives:
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- Particular web applications may spawn a shell process legitimately
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level: high
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