KrebsonSecurity has reported that the Russian organized cybercrime group dubbed the Carbanak Gang, which in the past has been suspected of stealing more than $1 billion from banks, retailers and hotels and restaurants worldwide, may have breached “hundreds of computer systems” at Oracle Corp’s MICROS division.

It is further reported that Oracle’s MICROS division is one of the top three point-of-sale vendors globally, and the compromise includes a customer support portal for the point-of-sale systems used by companies throughout the world, including approximately 330,000 sales registers worldwide.

Oracle has confirmed that it has detected malicious code on some of the MICROS systems and is asking customers to reset their passwords for the MICROS online support portal. This writer has received several emails already from several well-known hotel chains used for travel that my password has automatically been reset. Word to the wise: reset your passwords frequently.