HamJam (Sythe Mod) hijacked my account to steal 22M

I was stunned yesterday to find out my account was hijacked. My 22M went down the drain. I had a hard time finding out how all this could have happened, because

1) I never entered my password anywhere other than Runescape
2) I never downloaded any program of any site + I scanned my computer for keyloggers, etc.

Then it hit me. I gave my username and password to Hamjam on October 20, 2010 to buy 20M through the Grand exchange. I am 100% confident he is the person who hijacked my account as the IP address (Beijing, China) last logged in matches the one he logged in on that date.

I never actually bothered changing my password as Hamjam was a trusted seller here and I didn't think he would hijack my account. But I was wrong. Never trust anyone. Always take precautions. I should have changed my password, but that's a lesson learned. I also added a bank pin after this incident.

PROOF:
117.93.20.167

This is the IP address I got when I first logged into the account after recovering it. Here are some details I got after tracing the IP:

Code:

IP address [?]: 	117.93.20.167 
IP country code: 	CN
IP address country: 	China
IP address state: 	Beijing
IP address city: 	Beijing
IP address latitude: 	39.9289
IP address longitude: 	116.3883
ISP of this IP [?]: 	CHINANET jiangsu province network
Organization: 	CHINANET jiangsu province network
Host of this IP: [?]: 	167.20.93.117.broad.yc.js.dynamic.163data.com.cn

I know this is not "sufficient" proof, but if an Admin would help me trace the IP in the forum, it would be helpful. The hijacker could have also used a Proxy/VPN.

 

No matches found. If any other mod wants to add in feel free.