Suspicious File Characteristics Due to Missing Fields — Sigma Rule

Rule metadata and linked tags

Author: Markus Neis, Sander Wiebing. Source status: test; severity: medium. Source dates: 2018-11-22 / 2022-10-09.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 863049160157abb480cdef90db92c82a283de12b001a7aebdf10184ecc29dc60

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 File Characteristics Due to Missing Fields
id: 9637e8a5-7131-4f7f-bdc7-2b05d8670c43
status: test
description: Detects Executables in the Downloads folder without FileVersion,Description,Product,Company likely created with py2exe
references:
    - https://securelist.com/muddywater/88059/
    - https://www.virustotal.com/#/file/276a765a10f98cda1a38d3a31e7483585ca3722ecad19d784441293acf1b7beb/detection
author: Markus Neis, Sander Wiebing
date: 2018-11-22
modified: 2022-10-09
tags:
    - attack.execution
    - attack.t1059.006
logsource:
    product: windows
    category: process_creation
detection:
    selection1:
        Description: '\?'
        FileVersion: '\?'
    selection2:
        Description: '\?'
        Product: '\?'
    selection3:
        Description: '\?'
        Company: '\?'
    folder:
        Image|contains: '\Downloads\'
    condition: (selection1 or selection2 or selection3) and folder
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://securelist.com/muddywater/88059/
• https://www.virustotal.com/#/file/276a765a10f98cda1a38d3a31e7483585ca3722ecad19d784441293acf1b7beb/detection