Java Cracking...

[Mkz]

Originally Posted by deephousederek

Attempted to work on these but ran into some problems with re-compiling the offending file....

You're probably talking about the reserved-words methods and fields.
You can recreate a totally new NetUpdater class, provided you keep the same interface (implements, constructor and the 2 public methods). All else can be removed, as well as these method contents. You might need to leave some code to reenable the serial, though, be it here or in the class that calls this one.

After you have a fixed file, you can either remove the exception (not an Exception ) for this class in the classloader, to load a regular .class, or you can recreate the xclass so that everything else is untouched. If I recall correctly, the xclass is decoded with a symmetric algo (in com.aetdata.security.a), and you can easily find the algName and key by inserting some logs in the classloader. It is not in java code, it's propagated from the .exe.
After that you can recreate the .xclass from the .class.