During the chat, Diabl0 revealed that the Mytob worm had a very sneaky purpose. One of its intentions was to lower security settings on Microsoft's Internet Explorer browser so certain pop-up adverts would not be blocked. Diabl0 said he would be paid by the pop-up ad makers for every user hit. Even if the compromised users managed to remove the virus, bragged Diabl0, the settings would likely go unchanged and the stream of unwanted adverts would continue.