Twitter is under a phishing attack.

In this period an attack is developing on Twitter. It consists into receiving direct messages containing "lol, is that you" or "lol, this is funny, followed by a link. When you enter the link, you will be asked to enter your user and password, and, after this procedure, your account will start sending the same messages. If you got the message, you shouldn't worry, but if your account starts sending these types of messages by its own, change your password immediately.

The messages will take you to a page from allinonecontracting.com, which links after to bzpharma.net. Anything you're doing, do NOT click on these links.