IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Third-party Backup Files Deleted via Unexpected Process
editThird-party Backup Files Deleted via Unexpected Process
editIdentifies the deletion of backup files, saved using third-party software, by a process outside of the backup suite. Adversaries may delete Backup files to ensure that recovery from a Ransomware attack is less likely.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
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
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Impact
Version: 1
Added (Elastic Stack release): 7.16.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positives
editCertain utilities that delete files for disk cleanup or Administrators manually removing backup files.
Rule query
editfile where event.type == "deletion" and ( /* Veeam Related Backup Files */ (file.extension : ("VBK", "VIB", "VBM") and not process.executable : ("?:\\Windows\\Veeam\\Backup\\*", "?:\\Program Files\\Veeam\\Backup and Replication\\*", "?:\\Program Files (x86)\\Veeam\\Backup and Replication\\*")) or /* Veritas Backup Exec Related Backup File */ (file.extension : "BKF" and not process.executable : ("?:\\Program Files\\Veritas\\Backup Exec\\*", "?:\\Program Files (x86)\\Veritas\\Backup Exec\\*")) )
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Impact
- ID: TA0040
- Reference URL: https://attack.mitre.org/tactics/TA0040/
-
Technique:
- Name: Inhibit System Recovery
- ID: T1490
- Reference URL: https://attack.mitre.org/techniques/T1490/