Sigma rule: Potential BlackByte Ransomware Activity

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-1015e7fa6892, updated 2023-02-08T00:00:00.000Z.

Rule

Title
Potential BlackByte Ransomware Activity
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2022-02-25
Modified
2023-02-08
File
rules-emerging-threats/2021/Malware/BlackByte/proc_creation_win_malware_blackbyte_ransomware.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects command line patterns used by BlackByte ransomware in different operations

Log source

product
windows
category
process_creation

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_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.impact
  • attack.stealth
  • attack.t1485
  • attack.t1498
  • attack.t1059.001
  • attack.t1140
  • detection.emerging-threats

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Malware/BlackByte/proc_creation_win_malware_blackbyte_ransomware.yml

Sources and licences

  • SigmaHQ

    "Potential BlackByte Ransomware Activity" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Malware/BlackByte/proc_creation_win_malware_blackbyte_ransomware.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Potential BlackByte Ransomware Activity",
entity page, dataset version ref-1015e7fa6892, updated 2023-02-08T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/999e8307-a775-4d5f-addc-4855632335be (accessed 2026-11-03).
Underlying source: SigmaHQ rule 999e8307-a775-4d5f-addc-4855632335be, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.