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Potential Shell via Web Server

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Potential Shell via Web Server

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Identifies suspicious commands executed via a web server, which may suggest a vulnerability and remote shell access.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://pentestlab.blog/tag/web-shell/

Tags:

Elastic
Host
Linux
Threat Detection
Persistence

Version: 11

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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event.category:process and event.type:(start or process_started) and
process.name:(bash or dash or ash or zsh or "python*" or "perl*" or "php*") and
process.parent.name:("apache" or "nginx" or "www" or "apache2" or "httpd" or "www-data")

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/
Technique:
- Name: Server Software Component
- ID: T1505
- Reference URL: https://attack.mitre.org/techniques/T1505/
Sub-technique:
- Name: Web Shell
- ID: T1505.003
- Reference URL: https://attack.mitre.org/techniques/T1505/003/

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