Potential Secure Deletion with SDelete — Sigma Rule

Rule metadata and linked tags

Author: Thomas Patzke. Source status: test; severity: medium. Source dates: 2017-06-14 / 2024-12-13.

{
  "product": "windows",
  "service": "security"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 42c1e07fd708bd542bdc45d2a20dfc15e544ebd506c34141334cec323e5222e8

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: Potential Secure Deletion with SDelete
id: 39a80702-d7ca-4a83-b776-525b1f86a36d
status: test
description: Detects files that have extensions commonly seen while SDelete is used to wipe files.
references:
    - https://jpcertcc.github.io/ToolAnalysisResultSheet/details/sdelete.htm
    - https://www.jpcert.or.jp/english/pub/sr/ir_research.html
    - https://learn.microsoft.com/en-gb/sysinternals/downloads/sdelete
author: Thomas Patzke
date: 2017-06-14
modified: 2024-12-13
tags:
    - attack.impact
    - attack.stealth
    - attack.defense-impairment
    - attack.t1070.004
    - attack.t1027.005
    - attack.t1485
    - attack.t1553.002
    - attack.s0195
logsource:
    product: windows
    service: security
detection:
    selection:
        EventID:
            - 4656
            - 4663
            - 4658
        ObjectName|endswith:
            - '.AAA'
            - '.ZZZ'
    condition: selection
falsepositives:
    - Legitimate usage of SDelete
    - Files that are interacted with that have these extensions legitimately
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate usage of SDelete
• Files that are interacted with that have these extensions legitimately

Source references

• https://jpcertcc.github.io/ToolAnalysisResultSheet/details/sdelete.htm
• https://www.jpcert.or.jp/english/pub/sr/ir_research.html
• https://learn.microsoft.com/en-gb/sysinternals/downloads/sdelete