Avast Decryption Tool for LambdaLocker is designed to unlock LambdaLocker; a ransomware strain first spotted in May 2017.LambdaLocker is written in Python programming language, and the currently common variant is decryptable.Filename changes:The ransomware adds the ?.MyChemicalRomance4EVER? extension after a file name:foobar.doc -> foobar.doc.MyChemicalRomance4EVERdocument.dat -> document.dat.MyChemicalRomance4EVERThe ransomware also creates a text file named "UNLOCK_guiDE.txt" on the user's desktop as seen in the third screenshot below.