Reported in this forum post on the official IW forums and our very own forums apparently hackers have found a way to go around the IW.net system and send a Trojan virus through the IW.net system to Modern Warfare 2 players. Reverse engeneering the source code for Modern Warfare 2, the hackers inserted their Trojan and used the IW.net system to spread it to players across the globe. This was brought to light after several players got notified of a breach in their security by their antivirus software. The Trojan TR/Crypt.XPACK.Gen had been sent to them using Modern Warfare 2's IW.net as the official transmitter (according to the antivirus). The Trojan itself apparently already surfaced in Call of Duty: World at War and is some sort of keylogging software hackers use to steal keycodes or potentially worse (stealing credit card information for instance).

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the real term for "hackers" are "Crackers"...
a hacker is just one who are good with computers...
a cracker is one who uses his skills with computers to do illegal stuff...

the real term for "hackers" are "Crackers"...
a hacker is just one who are good with computers...
a cracker is one who uses his skills with computers to do illegal stuff...

Black Hat Hackers (also called "crackers"), are hackers who specialize in unauthorized penetration. They may use computers to attack systems for profit, for fun, or for political motivations or as a part of a social cause. Such penetration often involves modification and/or erasing of data, and is done without authorization and hence they should not be confused with “ethical hackers� (see white hat hacker).

They also may distribute computer viruses, Internet worms, and deliver spam through the use of botnets. The term may also refer to hackers who crack software to remove copy restriction methods: copy prevention, trial/demo version, serial number, hardware key, date checks, CD check (NO-CD) or software annoyances like nag screens and adware.

The Black Hat Conference is a major conference dedicated both to learning (and potentially furthering) Black Hat techniques and also to understanding and preventing them.

In hacker culture, a script kiddie, or skiddie, occasionally script bunny, skid, script kitty, script-running juvenile (SRJ), or similar, is a derogatory term used to describe those who use scripts or programs developed by others to attack computer systems and networks. It is generally assumed that script kiddies are juveniles who lack the ability to write sophisticated hacking programs or exploits on their own, and that their objective is to try to impress their friends or gain credit in computer-enthusiast communities.[1]