File or Directory Deletion Command

This rule identifies the execution of commands that can be used to delete files and directories. Adversaries may delete files and directories on a host system, such as logs, browser history, or malware.

Rule type: eql
Rule indices:

• logs-endpoint.events.process-*

Rule Severity: low
Risk Score: 21
Runs every: 60m
Searches indices from: now-119m
Maximum alerts per execution: ?
References:

Tags:

• Domain: Endpoint
• OS: Windows
• Use Case: Threat Detection
• Tactic: Defense Evasion
• Rule Type: BBR
• Data Source: Elastic Defend

Version: ?
Rule authors:

• Elastic

Rule license: Elastic License v2

process where host.os.type == "windows" and event.type == "start" and
(
  (process.name: "rundll32.exe" and process.args: "*InetCpl.cpl,Clear*") or
  (process.name: "reg.exe" and process.args:"delete") or
  (
    process.name: "cmd.exe" and process.args: ("*rmdir*", "*rm *", "rm") and
    not process.args : (
          "*\\AppData\\Local\\Microsoft\\OneDrive\\*",
          "*\\AppData\\Local\\Temp\\DockerDesktop\\*",
          "*\\AppData\\Local\\Temp\\Report.*",
          "*\\AppData\\Local\\Temp\\*.PackageExtraction"
    )
  ) or
  (process.name: "powershell.exe" and process.args: ("*rmdir", "rm", "rd", "*Remove-Item*", "del", "*]::Delete(*"))
) and not user.id : "S-1-5-18"

Framework: MITRE ATT&CK

• Tactic:

  • Name: Defense Evasion
  • Id: TA0005
  • Reference URL: https://attack.mitre.org/tactics/TA0005/

• Technique:

  • Name: Indicator Removal
  • Id: T1070
  • Reference URL: https://attack.mitre.org/techniques/T1070/

• Sub Technique:

  • Name: File Deletion
  • Id: T1070.004
  • Reference URL: https://attack.mitre.org/techniques/T1070/004/