Potential KamiKakaBot Activity - Winlogon Shell Persistence

Detects changes to the "Winlogon" registry key where a process will set the value of the "Shell" to a value that was observed being used by KamiKakaBot samples in order to achieve persistence.

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Detection logic

selection

TargetObject|endswith: \Microsoft\Windows NT\CurrentVersion\Winlogon\Shell
Details|contains|all:
  - -nop -w h
  - $env
  - explorer.exe
  - Start-Process

Condition

selection

Raw YAML

title: Potential KamiKakaBot Activity - Winlogon Shell Persistence
id: c9b86500-1ec2-4de6-9120-d744c8fb5caf
status: test
description: |
    Detects changes to the "Winlogon" registry key where a process will set the value of the "Shell" to a value that was observed being used by KamiKakaBot samples in order to achieve persistence.
references:
    - https://www.nextron-systems.com/2024/03/22/unveiling-kamikakabot-malware-analysis/
author: Nasreddine Bencherchali (Nextron Systems), X__Junior
date: 2024-03-22
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547.001
    - detection.emerging-threats
logsource:
    category: registry_set
    product: windows
detection:
    selection:
        TargetObject|endswith: '\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell'
        Details|contains|all:
            - '-nop -w h'
            - '$env'
            - 'explorer.exe'
            - 'Start-Process'
    condition: selection
falsepositives:
    - Unlikely
level: high