Exports Registry Key To a File — Sigma Rule

Rule metadata and linked tags

Author: Oddvar Moe, Sander Wiebing, oscd.community. Source status: test; severity: low. Source dates: 2020-10-07 / 2024-03-13.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: d7f88555bfbff4bbc7433fcaaacb00bc55c60920e9a9da4c5f6f1ffa61d79a92

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: Exports Registry Key To a File
id: f0e53e89-8d22-46ea-9db5-9d4796ee2f8a
related:
    - id: 82880171-b475-4201-b811-e9c826cd5eaa
      type: similar
status: test
description: Detects the export of the target Registry key to a file.
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Regedit/
    - https://gist.github.com/api0cradle/cdd2d0d0ec9abb686f0e89306e277b8f
author: Oddvar Moe, Sander Wiebing, oscd.community
date: 2020-10-07
modified: 2024-03-13
tags:
    - attack.exfiltration
    - attack.discovery
    - attack.t1012
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\regedit.exe'
        - OriginalFileName: 'REGEDIT.EXE'
    selection_cli:
        CommandLine|contains|windash: ' -E '
    filter_1:   # filters to avoid intersection with critical keys rule
        CommandLine|contains:
            - 'hklm'
            - 'hkey_local_machine'
    filter_2:
        CommandLine|endswith:
            - '\system'
            - '\sam'
            - '\security'
    condition: all of selection_* and not all of filter_*
falsepositives:
    - Legitimate export of keys
level: low

Original YAML and metadata in JSON

False positives

• Legitimate export of keys

Source references

• https://lolbas-project.github.io/lolbas/Binaries/Regedit/
• https://gist.github.com/api0cradle/cdd2d0d0ec9abb686f0e89306e277b8f