Detection rules › Sigma
Potential BlackByte Ransomware Activity
Detects command line patterns used by BlackByte ransomware in different operations
MITRE ATT&CK coverage
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
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
Stages and Predicates
Stage 0: condition
1 of selection_*Stage 1: selection_1
selection_1:
Image|startswith: 'C:\Users\Public\'
CommandLine|contains: ' -single '
Stage 2: selection_2
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 '
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | starts_with |
| field:"Image" kind:starts_with value:"C:\Users\Public\" |