Download Botnets : The Killer Web Applications by Craig A Schiller; David Harley; Gadi Evron; Carsten Willems; PDF

By Craig A Schiller; David Harley; Gadi Evron; Carsten Willems; Tony Bradley; All authors

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Extra info for Botnets : The Killer Web Applications

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Waiting for Orders and Retrieving the Payload Once secured, the botnet client will listen to the C&C communications channel. In this overview, we are describing botnets that are controlled using IRC channels. In the following chapter we will describe alternative C&C technologies. Each botnet family has a set of commands that it supports. 1, among others (adapted from the Know Your Enemy series, “Tracking Botnets—Botnet Commands” by the Honeynet Project). 1 Botnet Command Examples Function Command Code Recruiting (scanall|sa) (scanstats|stats) scandel [port|method] —[method] can be one of a list of exploits including lsass, mydoom, DameWare, etc.

What makes a botnet a botnet? In particular, how do you distinguish a botnet client from just another hacker break-in? First, the clients in a botnet must be able to take actions on the client without the hacker having to log into the client’s operating system (Windows, UNIX, or Mac OS). Second, many clients must be able to act in a coordinated fashion to accomplish a common goal with little or no intervention from the hacker. If a collection of computers meet this criteria it is a botnet. 2). Botnets with hundreds or a few thousands of botclients (called zombies or drones) are considered small botnets.

Htm), “Parson admitted that he created his worm by modifying the original MS Blaster worm and adding a mechanism that allowed him to have complete access to certain infected computers. Parson then infected approximately fifty computers that he had previously hijacked with his worm. qxd 22 1/8/07 11:53 AM Page 22 Chapter 1 • Botnets: A Call to Action computers, Parson’s worm spread to other individual computers. Parson’s worm then directed those infected computers to launch an attack against a Microsoft Web site.

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