Potential BlackByte Ransomware Activity

 1title: Potential BlackByte Ransomware Activity
 2id: 999e8307-a775-4d5f-addc-4855632335be
 3status: test
 4description: Detects command line patterns used by BlackByte ransomware in different operations
 5references:
 6    - https://redcanary.com/blog/blackbyte-ransomware/
 7author: Florian Roth (Nextron Systems)
 8date: 2022-02-25
 9modified: 2023-02-08
10tags:
11    - detection.emerging-threats
12    - attack.execution
13    - attack.defense-evasion
14    - attack.impact
15    - attack.t1485
16    - attack.t1498
17    - attack.t1059.001
18    - attack.t1140
19logsource:
20    category: process_creation
21    product: windows
22detection:
23    selection_1:
24        Image|startswith: 'C:\Users\Public\'
25        CommandLine|contains: ' -single '
26    selection_2:
27        CommandLine|contains:
28            - 'del C:\Windows\System32\Taskmgr.exe'
29            - ';Set-Service -StartupType Disabled $'
30            - 'powershell -command "$x =[System.Text.Encoding]::Unicode.GetString([System.Convert]::FromBase64String('
31            - ' do start wordpad.exe /p '
32    condition: 1 of selection_*
33falsepositives:
34    - Unknown
35level: high