Prefetch File Deleted — Sigma Rule

Rule metadata and linked tags

Author: Cedric MAURUGEON. Source status: test; severity: high. Source dates: 2021-09-29 / 2024-01-25.

{
  "product": "windows",
  "category": "file_delete"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 5cd9537b3b3c8cbd5c84fef26e8eb6c46bba6bea615224eb557291d8667db071

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Prefetch File Deleted
id: 0a1f9d29-6465-4776-b091-7f43b26e4c89
status: test
description: Detects the deletion of a prefetch file which may indicate an attempt to destroy forensic evidence
references:
    - Internal Research
    - https://www.group-ib.com/blog/hunting-for-ttps-with-prefetch-files/
author: Cedric MAURUGEON
date: 2021-09-29
modified: 2024-01-25
tags:
    - attack.stealth
    - attack.t1070.004
logsource:
    product: windows
    category: file_delete
detection:
    selection:
        TargetFilename|contains: ':\Windows\Prefetch\'
        TargetFilename|endswith: '.pf'
    filter_main_svchost:
        Image|endswith: ':\windows\system32\svchost.exe'
        User|contains: # covers many language settings
            - 'AUTHORI'
            - 'AUTORI'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• Internal Research (source note; no public URL supplied)
• https://www.group-ib.com/blog/hunting-for-ttps-with-prefetch-files/