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Anatomy of attacks

Anatomy of attacks. Buffer Overflow attacks & Rootkits. Warning. Do not use hacking tools unless you are sure you have sysadmin’s permission. Company policy  fired/suspended Illegal Go to Jail Honor Code

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Anatomy of attacks

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Presentation Transcript

  1. Anatomy of attacks Buffer Overflow attacks & Rootkits

  2. Warning • Do not use hacking tools unless you are sure you have sysadmin’s permission. • Company policy  fired/suspended • Illegal Go to Jail • Honor Code • Just because you have a set of master-keys does NOT give you permission to drive anyone’s car!

  3. Prep for class • Log into a Linux VM • Download the Embry-Riddle demos • Demos only, not real hacks • Open a tty in Linux for the rootkit demos.

  4. Gift of fire? • To get access to the world through the Internet we trade increased exposure of ourselves. • The trade is not optional • Improved user experience requires • Personal knowledge • Apple iPhone: Siri?

  5. Buffer Overflow • Work through the Embry-Riddle tutorial • “Stacks”—normal returns & data on stack • “Spock”—Buffer overflow with altered data • “Smasher”—Buffer overflow with altered return address • “Stackguard”—using a “canary” to sniff an attack • RSA notes • Questions • How do these get into the users’ system?

  6. Root Kits • Work through LinuxFocusNotes • Story of the Sony rootkit problem

  7. Rootkit details • Definition trojan and backdoor • Example: Linux Root kit trojanned commands • Promiscuous mode is dangerous • DEMO: Use ifconfig to check promiscuous (su) • Linux ttyifconfig –a; ifconfig eth1 promisc • And use ifconfig eth1 –promiscto undo • Try tcpdump –i any to view traffic (tutorial) • Can use checksum to detect altered commands • if clean backups are available

  8. Rootkit Questions • Class exercise: Search Google for current “rootkit” info • How do rootkits get installed? • How can you detect them? • How can you remove them?

  9. Root kit summary • Review main points in notes • If the system is compromised the cracker can use trojanned commands and backdoors to hide • It is nearly impossible to use a rooted system to clean itself • Boot off CD with toolkit

  10. Script Kiddies • MetasploitDemo video

  11. More? • IT466 Information Assurance and Security (IAS) • Discusses this in depth • With discussions of ethics • And “sandbox” exercises

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