Renamed Sysinternals Sdelete Execution — Sigma Rule

Rule metadata and linked tags

Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-09-06 / 2023-02-03.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 917e86b9aafd8f942e2a2f9b6a6a24939324a5b039cf64e404c73eefc312d8fc

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: Renamed Sysinternals Sdelete Execution
id: c1d867fe-8d95-4487-aab4-e53f2d339f90
status: test
description: Detects the use of a renamed SysInternals Sdelete, which is something an administrator shouldn't do (the renaming)
references:
    - https://learn.microsoft.com/en-us/sysinternals/downloads/sdelete
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1485/T1485.md
author: Florian Roth (Nextron Systems)
date: 2022-09-06
modified: 2023-02-03
tags:
    - attack.impact
    - attack.t1485
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        OriginalFileName: 'sdelete.exe'
    filter:
        Image|endswith:
            - '\sdelete.exe'
            - '\sdelete64.exe'
    condition: selection and not filter
falsepositives:
    - System administrator usage
level: high

Original YAML and metadata in JSON

False positives

• System administrator usage

Source references

• https://learn.microsoft.com/en-us/sysinternals/downloads/sdelete
• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1485/T1485.md