Potential BlackByte Ransomware Activity

Detects command line patterns used by BlackByte ransomware in different operations

Detection logic

selection_1

Image|startswith: C:\Users\Public\
CommandLine|contains: " -single "

selection_2

CommandLine|contains:
  - del C:\Windows\System32\Taskmgr.exe
  - ;Set-Service -StartupType Disabled $
  - powershell -command "$x =[System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String(
  - " do start wordpad.exe /p "

Condition

1 of selection_*

Raw YAML

title: Potential BlackByte Ransomware Activity
id: 999e8307-a775-4d5f-addc-4855632335be
status: test
description: Detects command line patterns used by BlackByte ransomware in different operations
references:
    - https://redcanary.com/blog/blackbyte-ransomware/
author: Florian Roth (Nextron Systems)
date: 2022-02-25
modified: 2023-02-08
tags:
    - attack.execution
    - attack.impact
    - attack.stealth
    - attack.t1485
    - attack.t1498
    - attack.t1059.001
    - attack.t1140
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection_1:
        Image|startswith: 'C:\Users\Public\'
        CommandLine|contains: ' -single '
    selection_2:
        CommandLine|contains:
            - 'del C:\Windows\System32\Taskmgr.exe'
            - ';Set-Service -StartupType Disabled $'
            - 'powershell -command "$x =[System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String('
            - ' do start wordpad.exe /p '
    condition: 1 of selection_*
falsepositives:
    - Unknown
level: high