IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Unusual Process Execution - Tempedit
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: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Linux
- Threat Detection
Version: 8 (version history)
Added (Elastic Stack release): 7.6.0
Last modified (Elastic Stack release): 8.3.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positivesedit
Build systems, like Jenkins, may start processes in the /tmp directory. These can be exempted by name or by username.
Rule queryedit
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/)
Rule version historyedit
- Version 8 (8.3.0 release)
-
-
Updated query, changed from:
event.category:process and event.type:(start or process_started) and process.working_directory:/tmp
-
- Version 7 (7.12.0 release)
-
- Formatting only
- Version 6 (7.11.2 release)
-
- Formatting only
- Version 5 (7.10.0 release)
-
- Formatting only
- Version 4 (7.9.1 release)
-
- Formatting only
- Version 3 (7.9.0 release)
-
-
Updated query, changed from:
process.working_directory:/tmp and event.action:executed
-
- Version 2 (7.7.0 release)
-
-
Updated query, changed from:
process.working_directory: /tmp and event.action:executed
-