Ransomware Research

BlackSheep Ransomware

BlackSheep is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
BlackSheep
First Seen
May 1, 2017

How BlackSheep ransomware works

File modification behavior

BlackSheep updates file modification timestamps after encryption.

File encryption patterns

BlackSheep modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
  • .666

Ransom note and payment demands

After encrypting files, BlackSheep displays ransom notes demanding payment for file recovery:

message
notes/note.txt

Location: OnceOnCompletion

Technical indicators

Associated executable files

The following executable files are associated with BlackSheep ransomware:

  • BLACKSHEEP.exe

About this analysis

This BlackSheep ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like BlackSheep.

Last updated: February 28, 2023

Detection coverage

Elastio detects BlackSheep inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify BlackSheep across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.