Prefetch File Deleted

testhigh

log source: windows · file_deleteauthor Cedric MAURUGEONdate 2021-09-29

description

What this is, in brief.

Detects the deletion of a prefetch file which may indicate an attempt to destroy forensic evidence

rule source (YAML)

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

detects techniques (1)

ATT&CK techniques this enables or maps to.

T1070.004File Deletion

references

External citations — patches, advisories, analysis.

Internal Research
https://www.group-ib.com/blog/hunting-for-ttps-with-prefetch-files/