DTMF

Botnets and their masters can communicate with each other by calling into the same VoIP conference call and swapping data using touch tones, researchers demonstrated at Defcon. This gives the botmasters, whose top goals include remaining anonymous, the ability to issue orders from random payphones and disposable wireless handsets, said researchers Itzik Kotler and Iftach Ian Amit of security and risk assessment firm Security Art. Using phones and the public phone networks eliminates one of […]