Unusual Process Execution - Temp

Elastic Stack Serverless Security

Identifies processes running in a temporary folder. This is sometimes done by adversaries to hide malware.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

Elastic
Host
Linux
Threat Detection
Execution

Version: 9

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

		event.category:process and event.type:(start or process_started) and process.working_directory:/tmp and
  not process.parent.name:(update-motd-updates-available or
                           apt or apt-* or
                           cnf-update-db or
                           appstreamcli or
                           unattended-upgrade or
                           packagekitd) and
  not process.args:(/usr/lib/update-notifier/update-motd-updates-available or
                    /var/lib/command-not-found/)

	

Framework: MITRE ATT&CKTM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/