They've also singled out those who've had "signs of unauthorized access" by way of unusual IP addresses. For now auction house access is disabled via the mobile app.
Blizzard has teams ready to deal with items and gold that was stolen. It's beenthat hundreds of thousands in gold has been stolen from users.
"There’s been a recent increase in unauthorized World of Warcraft account-logins via our website and the World of Warcraft mobile armory app," posted Blizzard via .
"We’re in the process of notifying any account holders who were not using an authenticator and whose account showed signs of unauthorized access (e.g., logging in from an unusual IP address). If you are among this group, you will receive an email describing how to reset your account."
"As a result of these activities, access to the World of Warcraft auction house via the mobile app has been taken off-line temporarily. Upon request, our customer support team will restore in-game items and gold for any accounts impacted."
They advise periodically changing your account password, and taking a look at their. So concerned is Blizzard over account security that they even dangle a Corehound pet as incentive to attach an authenticator.
Blizzard issue "account security warning" over mobile armory hacks
25 June 2013 | By Simon Priest