Florian Roth
43 lines
1.1 KiB
YAML
43 lines
1.1 KiB
YAML
title: Linux Webshell Indicators
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id: 818f7b24-0fba-4c49-a073-8b755573b9c7
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status: experimental
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description: Detects suspicious sub processes of web server processes
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references:
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- https://www.acunetix.com/blog/articles/web-shells-101-using-php-introduction-web-shells-part-2/
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date: 2021/10/15
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author: Florian Roth
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tags:
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- attack.persistence
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- attack.t1100 # an old one
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- attack.t1505.003
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logsource:
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product: linux
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category: process_creation
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detection:
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selection_general:
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ParentImage|endswith:
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- '/httpd'
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- '/lighttpd'
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- '/nginx'
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- '/apache2'
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- '/node'
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selection_tomcat:
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ParentCommandLine|contains|all:
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- '/bin/java'
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- 'tomcat'
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selection_websphere: # ? just guessing
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ParentCommandLine|contains|all:
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- '/bin/java'
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- 'websphere'
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selection_sub_processes:
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Image|endswith:
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- '/whoami'
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- '/ifconfig'
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- '/usr/bin/ip'
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- '/bin/uname'
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condition: selection_sub_processes and ( selection_general or selection_tomcat )
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falsepositives:
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- Web applications that invoke Linux command line tools
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level: critical
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