expl0itr on 6:26 AM 07/26/2022: Error: An unexpected error occurred while trying to open file crackme.jar
It seems the MANIFEST.MF file is broken.
mara on 7:33 AM 08/08/2022: the jar is corrupted ?
AslordX on 7:13 AM 01/29/2024: so before solving this shit, you have to deobfuscate it... I tried "Recaf" and almost succeeded, there are 51 .java files with a few lines of understandable code, but they were still coded and I don't have time to study. In addition, I gave up continuing because another program called "deobfuscator-gui" was able to identify that in this .jar file the Java code was obfuscated with Zelix Klassmaster. It also indicates that it has found a class () that may contain suspicious code or decryption embedded in this static initialization block since it is special and is called automatically when the class is loaded.
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