Mknod Process Activityedit
The Linux mknod
program is sometimes used in the command payload of a remote
command injection (RCI) and other exploits. It is used to export a command shell
when the traditional version of netcat
is not available to the payload.
Rule type: query
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Linux
Version: 4 (version history)
Added (Elastic Stack release): 7.6.0
Last modified (Elastic Stack release): 7.9.1
Rule authors: Elastic
Rule license: Elastic License
Potential false positivesedit
Mknod is a Linux system program. Some normal use of this program, at varying levels of frequency, may originate from scripts, automation tools, and frameworks. Usage by web servers is more likely to be suspicious.
Rule queryedit
event.category:process and event.type:(start or process_started) and process.name:mknod
Rule version historyedit
- Version 4 (7.9.1 release)
-
- Formatting only
- Version 3 (7.9.0 release)
-
-
Updated query, changed from:
process.name:mknod and event.action:executed
-
- Version 2 (7.7.0 release)
-
-
Updated query, changed from:
process.name: mknod and event.action:executed
-