Packet Encryption Algorithm

[Trinixxx]

Hello to everyone, i want know if someone have the algorithm which pw uses for his packet encryption, if no, where i can find a tutorial of how to find that on the assembly code in ollydbg, i've been trying for weeks but i've not found nothing

Thanks, sorry for the english =X

[Sᴡoosh]

It's RC4 with HMAC MD5 hash used as IV. Hashes are derived from random data, with HMAC component calculated from username + password hash.

Compression is in Server -> Client direction. They use modified MPPC with 8kb sliding history buffer.

[Trinixxx]

if possible, you can give me a example of code how to unpack/decrypt the packets? or some source code of anykind of bot/hack etc.. who use that type of function, i have visited some russian forums and i saw some mentions to a source of Vorts in C++ which decrypt the packets, do you have that source?

[Sᴡoosh]

Vort's POC bot doesn't work anymore on anything newer than 1.3.6. Why are you interested in it? Are you planning to release something?

[Trinixxx]

the versions 1.2.6~1.3.6 are enough to me, its just for study/knowledge on mmo hacking, to write some simple programs nothing big, did you can help me with some piece of code, of the decrypt(RC4) & decompression(MPPC) ?

[Stark77]

maybe this helps u abit: