Suspicious Executable File Creation — Sigma Rule

Rule metadata and linked tags

Author: frack113. Source status: test; severity: high. Source dates: 2022-09-05 / 2023-12-11.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: e89919d07261efad01ca6c59ae52e6af19a5326d1ada3fdbd2e6503467400ee6

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: Suspicious Executable File Creation
id: 74babdd6-a758-4549-9632-26535279e654
status: test
description: |
    Detect creation of suspicious executable file names.
    Some strings look for suspicious file extensions, others look for filenames that exploit unquoted service paths.
references:
    - https://medium.com/@SumitVerma101/windows-privilege-escalation-part-1-unquoted-service-path-c7a011a8d8ae
    - https://app.any.run/tasks/76c69e2d-01e8-49d9-9aea-fb7cc0c4d3ad/
author: frack113
date: 2022-09-05
modified: 2023-12-11
tags:
    - attack.stealth
    - attack.t1564
logsource:
    product: windows
    category: file_event
detection:
    selection:
        TargetFilename|endswith:
            - ':\$Recycle.Bin.exe'
            - ':\Documents and Settings.exe'
            - ':\MSOCache.exe'
            - ':\PerfLogs.exe'
            - ':\Recovery.exe'
            - '.bat.exe'
            - '.sys.exe'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://medium.com/@SumitVerma101/windows-privilege-escalation-part-1-unquoted-service-path-c7a011a8d8ae
• https://app.any.run/tasks/76c69e2d-01e8-49d9-9aea-fb7cc0c4d3ad/