Potential Encrypted Registry Blob Related To SNAKE Malware

Description

Detects the creation of a registry value in the ".wav\OpenWithProgIds" key with an uncommon name. This could be related to SNAKE Malware as reported by CISA

Query · sigma

selection:
  TargetObject|contains: \SOFTWARE\Classes\.wav\OpenWithProgIds\
filter_main_wav:
- TargetObject|endswith: .AssocFile.WAV
- TargetObject|contains: .wav.
condition: selection and not 1 of filter_main_*

Known false positives

  • Some additional tuning might be required to tune out legitimate processes that write to this key by default
Raw source Potential Encrypted Registry Blob Related To SNAKE Malware · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential Encrypted Registry Blob Related To SNAKE Malware
id: 7e163e96-b9a5-45d6-b2cd-d7d87b13c60b
status: test
description: Detects the creation of a registry value in the ".wav\OpenWithProgIds" key with an uncommon name. This could be related to SNAKE Malware as reported by CISA
references:
    - https://media.defense.gov/2023/May/09/2003218554/-1/-1/0/JOINT_CSA_HUNTING_RU_INTEL_SNAKE_MALWARE_20230509.PDF
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-10
modified: 2023-08-17
tags:
    - attack.persistence
    - detection.emerging-threats
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|contains: '\SOFTWARE\Classes\.wav\OpenWithProgIds\'
    filter_main_wav:
        - TargetObject|endswith: '.AssocFile.WAV'
        - TargetObject|contains: '.wav.'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Some additional tuning might be required to tune out legitimate processes that write to this key by default
level: medium

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