Milad Cheraghi
0f4572c9ac
update: Webshell Remote Command Execution - add execveat and match on euid instead of key --------- Co-authored-by: nasbench <nasbench@users.noreply.github.com> Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
36 lines
1.2 KiB
YAML
36 lines
1.2 KiB
YAML
title: Webshell Remote Command Execution
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id: c0d3734d-330f-4a03-aae2-65dacc6a8222
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status: test
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description: Detects possible command execution by web application/web shell
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references:
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- Personal Experience of the Author
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- https://www.vaadata.com/blog/what-is-command-injection-exploitations-and-security-best-practices/
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author: Ilyas Ochkov, Beyu Denis, oscd.community
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date: 2019-10-12
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modified: 2025-06-03
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tags:
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- attack.persistence
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- attack.t1505.003
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logsource:
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product: linux
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service: auditd
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definition: |
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Required auditd configuration:
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-a always,exit -F arch=b32 -S execve -F euid=33 -k detect_execve_www
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-a always,exit -F arch=b64 -S execve -F euid=33 -k detect_execve_www
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-a always,exit -F arch=b32 -S execveat -F euid=33 -k detect_execve_www
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-a always,exit -F arch=b64 -S execveat -F euid=33 -k detect_execve_www
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Change the number "33" to the ID of your WebServer user. Default: www-data:x:33:33
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detection:
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selection:
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type: 'SYSCALL'
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syscall:
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- 'execve'
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- 'execveat'
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euid: 33
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condition: selection
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falsepositives:
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- Admin activity
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- Crazy web applications
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level: critical
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