Computer Malware Type And History

Transcript

1. The Computer Malware By Afeef Imad Khateeb Palestine Polytechnic University Date :the 22th of July 2012
2. Outline • The malware. • The effect of the malware. • Timeline of malwares . • Main characteristics of malwares. • Types of malwares. • Virus classification based on target . • Detecting the virus • The antivirus • who write the viruses • Stuxnet • Recommendation
3. Abstract • The internet has become a powerful tool for enhancing innovation and productivity .nevertheless , the increasing dependency on the internet and other communication network means that the internet has become a popular and efficient way to spread the computer viruses and other types of malicious software or Malware .
4. The Malware What is a malware ? It is a program that can spread across computers and network by making copies of itself usually without the knowledge of the user
5. The effect of the malwares 1)Slow down email 2)Steal confidential data. 3)Use your computer to attack websites 4)Let other users hijack your computer. 5)And more ………
6. Timeline of viruses • 1950-2010 The first virus- at bell lab The most powerful virus in the 20th century - Michelangelo virus The most powerful virus in the 21th century –Stuxnet
7. The Main Characteristics Of the Malware 1) self-replication 2) the population of growth. 3) Parasitic malware
8. Types of viruses • Logic –bomb • Trojan horse • Back door • Spyware • Adware • Virus
9. Logic bomb • Logic –bomb: self replicate :no . population growth : zero. parasitic : possibly.
10. Trojan horse • Trojan horse : self replicate :no population growth : zero parasitic : yes
11. Back door Back door : self replicate : no. population growth : zero. parasitic : possibly. Example “”username = read_username() password = read_password() if tisername i s "133t h4ck0r": return ALLOW^LOGIN if username and password are valid: return ALLOW_LOGIN e l s e: return DENY^LOGIN””
12. Spyware • Spyware : self replicate :No population growth : Zero parasitic : No Attacks 1)Email addresses 2)Username/password 3)Bank account 4)Software licence
13. Adware • Adware : self replicate : No population of growth: Zero parasitic : No This is similar to spyware but it is concentrated ti advertisement
14. Viruses Viruses or (Virii) : self replicate : yes population of growth : positive parasitic : yes Definitions of viruses 1)Germ 2)Intended 3)Dormant
15. Virus classification by target • Boot sector infection
16. Virus classification by target cont • File infector • Macro
17. How to detect viruses
18. Command prompt • The first way is to use the command prompt • Very easy • …/cd/windows/system32/setup
19. The antivirus • The second way we use is the antivirus What is the antivirus Definition : Antivirus is a software that can delete viruses ,prevent access to infected files and often eliminate the infection.
20. Types of antivirus of the antivirus 1)Heuristics detection. 2)virus scanners. A)On-Access. B)On-Demand.
21. Three steps the antivirus use 1)Detection: detecting whether or not some code is a virus or not which is in purest form of detection results in a Boolean value yes there is a virus- so it is infected no there is no virus. 2)Identification : once a virus is detected the identification process may be distinct from detection or identification may occur as a side effect of detection . 3)Disinfection : is the process of removing detected viruses this is something called cleaning .
22. Who write viruses • If your computer, or your network, is hit by a virus, the first thing you’re likely to say – expletives apart – is “Why do people write these viruses?”
23. Stuxnet • Now we will see the video which talks about stuxnet 1)zero days 2)Iran enrichment facility 3)”Israel” and USA 4) The purpose of Stuxnet
24. Recommendation and conclusion I have found that there is no possibility that someone could prevent himself from malware %100 because every malware has its own characteristics and works different than any other malware so the user must take care and pay attention when using the internet or using any other peripherals like USB –Flash and also the user must make sure that an Email is from a known place and also the websites are famous, chose a good antivirus and make sure of its updates .
25. Make a small virus using the notepad • Now we will make a small virus using the notepad …….
26. Questions and answers
27. References • 1) John Aycock, Springer, computer viruses and malware 2006, definition and timeline pp. 11-33 andpp.53-70. • 2) Cio website for the malware timeline • http://www.cio.com/article/116250/A_Brief_History_o f_Malware_and_Cybercrime _(accessed july15, 2012) • 3) Eric Filio, Springer, computer viruses from theory to application2005, viruses or worms life cycle, pp.87-90. • 4) Paul Oldfield, Sophos, viruses and spam what you need to know, 2004, pp.27-52.