Timestomping using Touch Command

Timestomping is an anti-forensics technique which is used to modify the timestamps of a file, often to mimic files that are in the same folder.

Rule type: eql

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: 33

Tags:

Elastic
Host
Linux
macOS
Threat Detection
Defense Evasion

Version: 4 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 7.13.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

edit

process where event.type == "start" and process.name : "touch" and
user.id != "0" and process.args : ("-r", "-t", "-a*","-m*") and not
process.args : ("/usr/lib/go-*/bin/go", "/usr/lib/dracut/dracut-
functions.sh", "/tmp/KSInstallAction.*/m/.patch/*")

Threat mapping

edit

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Indicator Removal on Host
- ID: T1070
- Reference URL: https://attack.mitre.org/techniques/T1070/

Rule version history

edit

Version 4 (7.13.0 release)

Updated query, changed from:

process where event.type in ("start", "process_started") and
process.name : "touch" and process.args : ("-r", "-t", "-a*","-m*")

Version 3 (7.12.0 release)

Updated query, changed from:

process where event.type in ("start", "process_started") and
process.name == "touch" and wildcard(process.args, "-r", "-t",
"-a*","-m*")

Version 2 (7.11.2 release)

Formatting only

« Threat Intel Filebeat Module Indicator Match UAC Bypass Attempt via Elevated COM Internet Explorer Add-On Installer »