Firm Sees More DDoS Attacks Aimed at Telecom Systems

Attackers are now using DDoS services that offer attacks on telecommunication systems as part of larger attack schemes. These attacks, known as TDoS attacks, can be a relatively cheap option for cybercriminals looking into diversifying their attack vectors.

Attackers are now using DDoS services that offer attacks on telecommunication systems as part of larger attack schemes. These attacks, known as TDoS attacks, can be a relatively cheap option for cybercriminals looking into diversifying their attack vectors.

Researchers have seen a series of advertisements and forum posts promoting services that can “flood” both mobile and stationary telephone lines. Often these attacks are used as a distraction while attackers launch simultaneous attacks on their victims, according to Curt Wilson of Arbor Networks’ Security Engineering and Response Team (ASERT).

The advertisements publicize services to flood telephones for $20 a day and $5 per hour, $20 for 10 hours and $40 a day. “Prices depend on the individual and ‘complexity’ of the order,” according to one advertisement, seen below:

Wilson goes on to discuss several techniques attackers employ when penetrating Session Initiation Protocol (SIP) systems including running brute-force password guessing scripts and defeating default credentials to gain control of VoIP/PBX systems.

TDoS attacks are nothing new – the Federal Bureau of Investigation looked into the flooding of phone lines in 2010 after investigating an incident where a Florida dentist lost $400,000 from his retirement account through a diversionary TDoS attack.

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