Malicious Bots: An Inside Look into the Cyber-Criminal by Ken Dunham, Jim Melnick

By Ken Dunham, Jim Melnick

Initially designed to sabotage or annihilate web content, automatic "Bots" are more and more utilized in mass spamming occasions, fraud, extortion, id robbery, and software program robbery. concentrating on the malicious use of bots and bot herder potential and motivations, Malicious Bots offers a far wanted a source for figuring out the scope, sophistication, and felony makes use of of bots and the way to extra proactively safeguard opposed to them. Accessibly written, yet with enough technical element, the booklet introduces botnet threats and the way they functionality and examines the pinnacle bot assaults opposed to monetary and govt networks during the last 4 years to bare the who, how, and why at the back of them.

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Extra resources for Malicious Bots: An Inside Look into the Cyber-Criminal Underground of the Internet

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Org/ papers/bots/.  As shown in the next section, although IRC-based botnets such as Rbot still constitute a major threat, the trend is away from using IRC channels to employing Web-based controls for many botmasters. 6 Peering Inside the IRC Botnet In a recent study, German and Chinese researchers from the University of Mannheim and Peking University utilized an extensive honeynet that spanned 16 Chinese provinces to track more than 3,200 botnets in the wild.  They also assessed that the IRC-based approach to ­command and control for botnets was becoming less and less popular with botmasters, who were switching to other protocols that were beginning to replace them.

Bank that led to a staggering $21 million­ in estimated losses. 5 How Big Do Botnets Need to Be to Pose a Serious Threat? When does the size of a botnet pose a particular threat? A very large botnet, poorly managed, does not pose anywhere near the threat of a smaller but closely managed botnet operation. It all comes down to how the attacker is marshalling his or her resources. A few techniques for better managing botherds are identified below: ◾ Create multiple minor variants of a bot, each designed to be remotely controlled through a different IRC server.

At one time during the peak of the investigation, over 20,000 unique IP addresses were identified as being infected by the TK IRC bot. The list of infected computers included private organizations, telecommunication companies, financial institutions, universities, school districts, various government agencies, and military systems. 21 Network capture as of December 27, 2007, showing the TK IRC bot still infecting computers. 21). The most infected computers­ observed to be connected at any one time to a single IRC server were just over 4,000.

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