Timestomping using Touch Command
Elastic Stack Serverless Security
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: 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: 33
References: None
Tags:
- Elastic
- Host
- Linux
- macOS
- Threat Detection
- Defense Evasion
Version: 5
Rule authors:
- Elastic
Rule license: Elastic License v2
If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define event.ingested and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate event.ingested to @timestamp for this rule to work.
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/*")
Framework: MITRE ATT&CKTM
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/
Sub-technique:
- Name: Timestomp
- ID: T1070.006
- Reference URL: https://attack.mitre.org/techniques/T1070/006/