Most likely a virus.

[FlickNoJutsu]

There's a logger in it.

What the "hack" gets:
Your java runtime name & version
Your java vm version
Your country
dir of your java
Your os (windows 10 or sum)
Your computer's language
A keylogger
^^ https://github.com/radioegor146/ehacks-pro/blob/b1cbdea3df863cb09c04c1d7ea9c534c464b3b84/src/main/java/ehacks/mod/util/ultimatelogger/LoginInfo.java (all I said above)
Your Minecraft account > username, playerId, token & session
^^

ehacks-pro/src/main/java/ehacks/mod/util/ultimatelogger/SessionInfo.java

Line 14 in b1cbdea

public class SessionInfo {

(what I said above)

How to disable the logger?
Set

ehacks-pro/src/main/java/ehacks/mod/util/UltimateLogger.java

Line 26 in b1cbdea

private static final boolean doIt = true;

to false and build the solution. (And change your MC Password)

[Darkar25]

There is no keylogger tho
But otherwise pretty much yeah,you get a bit of malware with heck a cool cheat))