Distributed denial of service

Security in Computing (3rd Edition)

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Large Botnets and Distributed Denial of Service Attacks CS 161/194-1 Anthony D. Joseph October 28, 2005 October 26, 2005 CS161 Fal 2005 Joseph/Tygar/Vazirani/Wagner 2 Outline • What is a botnet? • How to create and use a botnet • The money trail… • Distributed Denial of Service Attacks • Examples October 26, 2005 CS161 Fal 2005 Joseph/Tygar/Vazirani/Wagner 3 What is a Botnet? • A network of compromised machines – See last lecture for compromise techniques • Zombies connect to server(s) – Typically one or more IRC servers running on zombies – Some botnets use custom encrypted protocols • Zombies await commands or perform pre- determined actions (e.g., send spam) – Some botnets require authenticated commands – Commands can be scripts or executables October 26, 2005 CS161 Fal 2005 Joseph/Tygar/Vazirani/Wagner 4 Creating and Using a Botnet IRC server Attack! Attack! Attack! Attack! You have 500 new msgs October 26, 2005 CS161 Fal 2005 Joseph/Tygar/Vazirani/Wagner 5 Botnets • Typically rented to “users” – Cost depends on metrics of botnet • Important metrics (“bragging rights”) – Number of machines (1,000’s – 100,000’s) – Aggregate bandwidth (gigabits – terabits)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/29/2008 for the course CS 194 taught by Professor Joseph during the Fall '05 term at University of California, Berkeley.

Page1 / 3

Distributed denial - Outline Large Botnets and Distributed Denial of Service Attacks CS 161/194-1 Anthony D Joseph What is a botnet How to create

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online