The Storm worm struck up to 50 million computers. It hid as an attachement to an email titled "230 dead as storm batters Europe," although some variations on the theme existed, including one referencing an earthquake in China around the time of the Beijing Olympics. The worm was used for profit and neglected to cause abnormal behavior. Instead, it logged keystrokes and built a large data base in order to sell the information. The worm was extremely elusive, relying on a code that could morph every 30 minutes. It was considered the future of malware, and turned victims into portals for spam.