The SIEM app is now a part of the Elastic Security solution.
Click
here to view the current documentation.
IMPORTANT: No additional bug fixes or documentation updates will be released for this version.
IMPORTANT: No additional bug fixes or documentation updates will be released for this version.
Potential Shell via Web Server
editPotential Shell via Web Server
editIdentifies suspicious commands executed via a web server, which may suggest a vulnerability and remote shell access.
Rule type: query
Rule indices:
- auditbeat-*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time)
Maximum signals per execution: 100
References:
Tags:
- Elastic
- Linux
Version: 3 (version history)
Added (Elastic Stack release): 7.6.0
Last modified (Elastic Stack release): 7.8.0
Potential false positives
editNetwork monitoring or management products may have a web server component that runs shell commands as part of normal behavior.
Rule query
editprocess.name:(bash or dash) and user.name:(apache or nginx or www or "www-data") and event.action:executed
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/techniques/TA0003/
-
Technique:
- Name: Web Shell
- ID: T1100
- Reference URL: https://attack.mitre.org/techniques/T1100/
Rule version history
edit- Version 3 (7.8.0 release)
-
Updated query, changed from:
process.name:bash and user.name:(apache or www or www-data) and event.action:executed
- Version 2 (7.6.1 release)
-
Updated query, changed from:
process.name: bash and user.name: (apache or www or "wwww-data") and event.action:executed