What is hacking?

1. What is hacking? Taeho Oh http://postech.edu/~ohhara ohhara@postech.edu

2. KaaShiv InfoTech • Ethical Hacking For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com

3. Contents (1) • Who is hacker? • History of hacking • Types of hacking • Hacking accidents • Why do hackers hack? • What hackers do after hacking? • What do hackers know? For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

4. Contents (2) • How can kid hack? • Why can’t Korean kid hack? • How can be a real hacker? • Why can’t defend against hackers? • How can protect the system? • What should do after hacked? For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

5. Contents (3) • How to translate the hackers’ language For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

6. Who is hacker? (1) • Hack • Cut with repeated irregular blows • Examine something very minutely • Hacker • The person who hacks • Cracker • System intruder/destroyer For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

7. Who is hacker? (2) • Hacker means cracker nowadays • Meaning has been changed For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

8. History of hacking • Telephone hacking • Use telephone freely • It’s called phreaking • Computer virus • Destroy many computers • Network hacking • Hack the important server remotely and destroy/modify/disclose the information For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

9. Types of hacking Normal data transfer Interruption Interception For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

10. Hacking accidents (1) • Internet Worm • Robert T. Morris made an internet worm. It spread through the internet and crashed about 6000 systems. • Cuckoo’s Egg • Clifford Stoll caught the hackers who are the German hackers applied by KGB For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

11. Hacking accidents (2) • IP Spoof • Kevin Mitnick was caught by Tsutomu Shimomura who was security expert. Kevin Mitnick uses the IP Spoof attack in this accident For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

12. Why do hackers hack? • Just for fun • Show off • Hack other systems secretly • Notify many people their thought • Steal important information • Destroy enemy’s computer network during the war For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

13. What do hackers do after hacking? (1) • Patch security hole • The other hackers can’t intrude • Clear logs and hide themselves • Install rootkit ( backdoor ) • The hacker who hacked the system can use the system later • It contains trojan ls, ps, and so on For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

14. What do hackers do after hacking? (2) • Install irc related program • identd, irc, bitchx, eggdrop, bnc • Install scanner program • mscan, sscan, nmap • Install exploit program • Install denial of service program • Use all of installed programs silently For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

15. What do hackers know? • Don’t know how to use vi • Don’t know what unix is • Don’t know what they do • Know how to intrude the system • Know how to crash the system • Know where the hacking programs are For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

16. How can kid hack? • Kid has much of time • Kid can search for longer time than other people • All hacking program is easy to use • Kid doesn’t have to know how the hacking program works • These kids are called script kiddies For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

17. Why can’t Korean kid hack? • Almost all Korean kids don’t know English well • Almost all hacking program manuals are written in English • However, many hacking program manuals are being translated For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

18. How can be a real hacker? • Study C/C++/assembly language • Study computer architecture • Study operating system • Study computer network • Examine the hacking tools for a month • Think the problem of the computer For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

19. Why can’t defend against hackers? • There are many unknown security hole • Hackers need to know only one security hole to hack the system • Admin need to know all security holes to defend the system For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

20. How can protect the system? (1) • Patch security hole often • Encrypt important data • Ex) pgp, ssh • Do not run unused daemon • Remove unused setuid/setgid program • Setup loghost For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

21. How can protect the system? (2) • Use switch hub • Setup firewall • Ex) ipchains • Setup IDS • Ex) snort • Check unintentional changes • Ex) tripwire For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

22. How can protect the system? (3) • Backup the system often For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

23. What should do after hacked? • Shutdown the system • Or turn off the system • Separate the system from network • Restore the system with the backup • Or reinstall all programs • Connect the system to the network • It can be good to call the police For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

24. How to translate the hackers’ language (1) 1 -> i or l 3 -> e 4 -> a 7 -> t 9 -> g 0 -> o $ -> s | -> i or l |\| -> n |\/| -> m s -> z z -> s f -> ph ph -> f x -> ck ck -> x For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

25. How to translate the hackers’ language (2) • Ex) • 1 d1d n0t h4ck th1s p4g3, 1t w4s l1k3 th1s wh3n 1 h4ck3d 1n • I did not hack this page, it was like this when I hacked in For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com

26. Contact Number Venkat - 766 766 2428 Email – kaashiv.info@gmail.com Priyanka - 72994 88034 www.kaashivinfotech.com

27. Thank you For Inplant Training / Internship, please download the "Inplant training registration form" from our website www.kaashivinfotech.com. Fill the form and send it to kaashiv.info@gmail.com www.kaashivinfotech.com