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  2. 2. HACKER
  3. 3. CONTENT♦ Overview of Hacking♦ Types of hacking♦ Hacker♦ Types of Hacker♦ Why do hackers hack?♦ How can kid hack?♦ What does a script kid know?♦ Hackers language♦ How to translate the hackers’ language
  4. 4. ♦ Ethical Hacking♦ Ethical Hacking – Process♦ What hackers do after hacking?♦ Why can’t defend against hackers?♦ How can protect the system?♦ What should do after hacked?♦ Final words
  5. 5. overview of hacking♦ Hack – Examine something very minutely – the rapid crafting of a new program or the making of changes to existing, usually complicated software♦ Hacker – The person who hacks♦ Cracker – System intruder/destroyer
  6. 6. HACKER♦ Someone who bypasses the system’s access controls by taking advantage of security weaknesses left in the system by developers♦ Person who is totally immersed in computer technology and programming, and who likes to examine the code of programs to see how they work … then uses his or her computer expertise for illicit purposes such as gaining access to computer systems without permission and tampering with programs and data. At that point, this individual would steal information and install backdoors, virus and Trojans♦ Hacker means cracker nowadays.
  7. 7. Types of hacker♦ White Hat Hackers: – who specializes in penetration testing and in other testing methodologies to ensure the security of an organizations information systems.♦ Black Hat Hackers: – A black hat is the villain or bad guy, especially in a western movie in which such a character would stereotypically wear a black hat in contrast to the heros white hat.♦ Gray Hat Hackers: – A grey hat, in the hacking community, refers to a skilled hacker whose activities fall somewhere between white and black hat hackers on a variety of spectra
  8. 8. Types of hacker♦ Script Kiddies: – who use scripts or programs developed by others to attack computer systems and networks and deface websites. [♦ Phreak – Person who breaks into telecommunications systems to [commit] theft♦ Cyber Punk – Recent mutation of … the hacker, cracker, and phreak
  9. 9. Why do people hack??♦ To make security stronger ( Ethical Hacking )♦ 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
  10. 10. 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
  11. 11. Hackers language :1 -> i or l || -> n3 -> e |/| -> m4 -> a s -> z7 -> t z -> s9 -> g f -> ph0 -> o ph -> f$ -> s x -> ck| -> i or ck -> x
  12. 12. What is Ethical Hacking♦ It is Legal♦ Permission is obtained from the target♦ Part of an overall security program♦ Identify vulnerabilities visible from Internet at particular point of time♦ Ethical hackers possesses same skills, mindset and tools of a hacker but the attacks are done in a non-destructive manner♦ Also Called – Attack & Penetration Testing,
  13. 13. Hackers language translationEXAMPLE:- Hacking is good H4ck|||g 1$ 900d
  14. 14. Hacking - Process1. Preparation2. Foot printing3. Enumeration & Fingerprinting4. Identification of Vulnerabilities5. Attack – Exploit the Vulnerabilities6. Gaining Access7. Escalating privilege8. Covering tracks9. Creating back doors
  15. 15. Preparation♦ Identification of Targets – company websites, mail servers, extranets, etc.♦ Signing of Contract – Agreement on protection against any legal issues – Contracts to clearly specifies the limits and dangers of the test – Specifics on Denial of Service Tests, Social Engineering, etc. – Time window for Attacks – Total time for the testing – Prior Knowledge of the systems – Key people who are made aware of the testing
  16. 16. Foot printingCollecting as much information about the target DNS Servers IP Ranges Administrative Contacts Problems revealed by administrators
  17. 17. Information Sources♦ Search engines♦ Forums♦ Databases – whois,♦ Tools – PING, whois, Traceroute, nslookup
  18. 18. Enumeration & Fingerprinting♦ Specific targets determined♦ Identification of Services / open ports♦ Operating System EnumerationMethods Banner grabbing Responses to various protocol (ICMP &TCP) commands Port / Service Scans – TCP Connect, TCP SYN, TCP FIN, etc.
  19. 19. Identification of VulnerabilitiesVulnerabilities: It is a weakness which allows an attacker to reduce a systems information assurance.♦ Insecure Configuration♦ Weak passwords♦ Unpatched vulnerabilities in services, Operating systems, applications♦ Possible Vulnerabilities in Services, Operating Systems♦ Insecure programming,Weak Access
  20. 20. ToolsVulnerability Scanners - Nessus, ISS, SARA, SAINTListening to Traffic – Ethercap, tcpdumpPassword Crackers – John the ripper, LC4, PwdumpIntercepting Web Traffic – Achilles, Whisker, Legion
  21. 21. Gaining access:♦ Enough data has been gathered at this point to make an informed attempt to access the target♦ Techniques – Password eavesdropping – File share brute forcing – Password file grab – Buffer overflows
  22. 22. Escalating Privileges♦ If only user-level access was obtained in the last step, the attacker will now seek to gain complete control of the system♦ Techniques – Password cracking – Known exploits
  23. 23. Covering Tracks♦ Once total ownership of the target is secured, hiding this fact from system administrators becomes paramount, lest they quickly end the romp.♦ Techniques – Clear logs – Hide tools
  24. 24. Creating Back Doors♦ Trap doors will be laid in various parts of the system to ensure that privileged access is easily regained at the whim of the intruder♦ Techniques – Create rogue user accounts – Schedule batch jobs – Infect startup files – Plant remote control services – Install monitoring mechanisms – Replace apps with trojans
  25. 25. Denial of Service♦ If an attacker is unsuccessful in gaining access, they may use readily available exploit code to disable a target as a last resort♦ Techniques – SYN flood – ICMP techniques – Identical SYN requests – Overlapping fragment/offset bugs – Out of bounds TCP options (OOB) – DDoS
  26. 26. What do hackers do after hacking?♦ 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 virus, and so on♦ Install irc related program – identd, irc, bitchx, eggdrop, bnc
  27. 27. ♦ Install scanner program – mscan, sscan, nmap♦ Install exploit program♦ Install denial of service program♦ Use all of installed programs silently
  28. 28. How can protect the system? Patch security hole often Encrypt important data  Ex) pgp, ssh Do not run unused daemon Remove unused setuid/setgid program Setup loghost • Backup the system often Setup firewall Setup IDS  Ex) snort
  29. 29. 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
  30. 30. H4CKING VS CR4CKING♦ HACKING WITH MALICIOUS INTENTION IS CRACKINGThe basic difference is hackers do not do anything disastrous.Cracking yield more devastating results.Cracking is crime.Cyber crime are the results of cracking ,not hacking
  31. 31. H4cking prone areas
  32. 32. Please send suggestions and feedbacksI am waiting for your replay. THANK YOU