Lockbit-black-builder-main.zip Apr 2026

The file is a malicious archive containing the leaked source code and builder for LockBit 3.0 (also known as LockBit Black) ransomware.

This specific package surfaced after a disgruntled developer leaked the builder on Twitter (now X) and GitHub in September 2022. It allows threat actors to customize and generate their own functional ransomware executables, which has led to a surge in "LockBit-style" attacks by various independent cybercriminal groups. Key Details LockBit-Black-Builder-main.zip

Possession or use of this file is illegal in many jurisdictions and poses a severe security risk to your own system, as builders themselves often contain backdoors or "stealers" targeting the person using them. The file is a malicious archive containing the

It enables users to select specific encryption modes, target local or network drives, and set up decryption IDs for victims. Key Details Possession or use of this file

Typically includes a keygen.exe , builder.exe , and various configuration files used to encrypt files and generate ransom notes.

Highly Malicious. Security platforms like ANY.RUN and App Any Run identify it as active ransomware.