Is there anyway to find the UserID / info of the SERVER" (spyware) which is already complied ??????????? is there any decomplier or something, need lil help here for my own knowledge...... :P :P
This is called reverse engineering and there are varying degrees of difficulty to this depending on how it is packed or obfuscated. It is definitely possible though.
Reverse Engineering RATs & Keyloggers is great fun. I personally prefer Keyloggers as there is more chance of stealing there login creds(email or FTP).
I always thought the best way to get the cred's to their server is to run the malware in a vm with a packet sniffer that isn't wireshark. I believe windump was a good alternative. Like Xin said, sometimes the creds can be found in an ascii string if you disassemble it, but if they pack it, or crypt it that becomes largely useless.