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Angry Developer Leaks LockBit Ransomware Builder

The latest 3.0 version of LockBit encryptor’s builder, labelled LockBit Black is leaked online, by one of the group’s developers.

 

The recently released 3.0 version of LockBit encryptor’s builder, called LockBit Black is leaked online. According to the Ransomware operator’s public representative LockBitSupp, this leak is not executed by a hacker, rather, it is the work of some disgruntled developer. 

About LockBit Black Builder 

The latest version, LockBit Black was under the testing phase till June and comprised numerous advanced features, such as auto-analysis, a ransomware bug bounty program, and newer methods of extortion. 

The builder included a password-protected 7z archive LockBit3Builder, it comprised four files – a batch file, a builder, a modifiable configuration file, and an encryption key generator. The files allow one to build the executable code to launch their own operation, such as encryptor, decryptor, and tools to execute the decryptor in a specific way.  

LockBit Ransomware’s Builder Leaks

A recently registered Twitter account by the handle @ali_qushji is under scrutiny by the security researchers of 3xport, as the Twitter user Ali Qushji claims that his team has gotten hold of LockBit servers and found a builder for the LockBit 3.0 ransomware encryptor. 

“Unknown person @ali_qusji said his team has hacked the LockBit servers and found the possible builder of LockBit Black (3.0) ransomware” the Tweet read. 

On September 10, the researchers at VX-Underground were allegedly contacted by a user named protonleak (@protonleaks1), who shared a copy of the builder. The research agency further claimed that the ransomware group was not hacked, but the private ransomware builder code was leaked by one of the group’s developers. 

The developer was allegedly hired by the LockBit ransomware group, he was discontented with the ransomware operator’s leadership, and leaked the builder in response. 

"We reached out to LockBit ransomware group regarding this and discovered this leaker was a programmer employed by LockBit ransomware group [...] They were upset with LockBit leadership and leaked the builder." VX-Underground tweeted. 

Threat to the Ransomware Operators

According to John Hammond, a security researcher at Huntress Labs, "This leak of the builder software commoditizes the ability to configure, customize, and ultimately generate the executables to not only encrypt but decrypt files[...] Anyone with this utility can start a full-fledged ransomware operation."   

The leak consequently is a threat to ransomware operators, as the builder code is now accessible to other ransomware operators. As a result, many new versions of the builder will soon be circulated by the operators. Moreover, the leaked builder will give security researchers a chance to conduct a better analysis of the ransomware, and develop advanced software that could tackle future attacks.
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