IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
System Log File Deletion
editSystem Log File Deletion
editIdentifies the deletion of sensitive Linux system logs. This may indicate an attempt to evade detection or destroy forensic evidence on a system.
Rule type: eql
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Linux
- Threat Detection
- Defense Evasion
Version: 101
Rule authors:
- Elastic
Rule license: Elastic License v2
Investigation guide
editRule query
editfile where event.type == "deletion" and file.path : ( "/var/run/utmp", "/var/log/wtmp", "/var/log/btmp", "/var/log/lastlog", "/var/log/faillog", "/var/log/syslog", "/var/log/messages", "/var/log/secure", "/var/log/auth.log", "/var/log/boot.log", "/var/log/kern.log" ) and not process.name : ("gzip")
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: Clear Linux or Mac System Logs
- ID: T1070.002
- Reference URL: https://attack.mitre.org/techniques/T1070/002/