​Deep Dive into Builder of Notorious Babuk Ransomware

This Cyble report presents a detailed technical analysis of the Babuk ransomware and a leaked Babuk builder binary, documenting builder and post-build artifacts, execution flows for builder/encryptor/decryptor, encryption/decryption logic (files renamed with .babyk, appended signature), destructive behaviors (stopping VSS, deleting shadow copies, emptying recycle bin), mutex and ransom note behavior, YARA detection rules, and SHA-256 IoCs; the availability of the builder increases risk of broader or automated ransomware campaigns.