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By | Dan Goodin 10th April 2007 22:55

WoW players learn value of Windows updates

'Vuln left me naked and penniless'

Subscribers playing World of Warcraft on Windows machines continue to find their accounts stolen more than eleven months after hackers first began targeting them using a Trojan attack, according to posts on the game's official website.

The perpetrators are employing sophisticated techniques that involve hundreds of booby-trapped sites that in some cases use the ANI cursor vulnerability that Microsoft patched last week.

According to an advisory by McAfee, some ANI exploits are being carried out by the same malicious hackers who commandeered the Miami Dolphins football stadium just in time for the Superbowl. The Trojan unleashed in that attack sat dormant on compromised machines until users opened the WoW client, at which point a keylogger captured login credentials, according to the BBC.

The booty can bring in good money on the black market. According to Symantec, WoW account logins are worth about $10, more than the going rate of $6 for verification details on credit cards.

WoW attacks work when users visit hacked websites that exploit Windows machines that have not been updated to fix the ANI flaw or other vulnerabilities. The sites, many of which are related to the popular online game, silently install keyloggers. Once an account is hijacked, the attackers collect the user's points and assets and then sell them. Reports of such attacks date back to at least May of 2006.

The account hijackings are causing considerable consternation among WoW users. "I logged in to my account last Wednesday morning to a naked and penniless Grajtik and associated bank alts," a player who goes by that moniker wrote in an online forum. Many victims have learned of the hijackings only after finding that Blizzard, which publishes WoW, had canceled their accounts, presumably because the hackers have violated WoW rules.

While some of the hijackings were carried by exploiting flaws ahead of an official patch, plenty of exploits have been carried out well after Microsoft issued updates, suggesting some players of WoW still haven't learned the most important and basic security measures.

An official Blizzard posting is urging players to promptly apply security updates and to take other measures to ward off attacks. The company also provides a console called Blizzard Launcher, which scans players' computers for malware. ®

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