Suspicious Registry Modification From ADS Via Regini.EXE — Sigma Rule

Rule metadata and linked tags

Author: Eli Salem, Sander Wiebing, oscd.community. Source status: test; severity: high. Source dates: 2020-10-12 / 2023-02-08.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 31fdeef0628c5b22f67ca011c5fca8f262eeb593ea1e0a51b5bbbb4451305873

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 Registry Modification From ADS Via Regini.EXE
id: 77946e79-97f1-45a2-84b4-f37b5c0d8682
related:
    - id: 5f60740a-f57b-4e76-82a1-15b6ff2cb134
      type: derived
status: test
description: Detects the import of an alternate data stream with regini.exe, regini.exe can be used to modify registry keys.
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Regini/
    - https://gist.github.com/api0cradle/cdd2d0d0ec9abb686f0e89306e277b8f
    - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/regini
author: Eli Salem, Sander Wiebing, oscd.community
date: 2020-10-12
modified: 2023-02-08
tags:
    - attack.persistence
    - attack.defense-impairment
    - attack.t1112
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\regini.exe'
        - OriginalFileName: 'REGINI.EXE'
    selection_re:
        CommandLine|re: ':[^ \\]'
    condition: all of selection_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://lolbas-project.github.io/lolbas/Binaries/Regini/
• https://gist.github.com/api0cradle/cdd2d0d0ec9abb686f0e89306e277b8f
• https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/regini