بررسي و شبيه سازي انتشار كدهاي مخرب در شبكه هاي اجتماعي

چكيده انگليسي :

Malware Propagation in online social network Analytical and Simulation approach Mohammad Reza Faghani faghani@ec iut ac ir Date of Submission 2009 05 24 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor H Saidi hsaidi@cc iut ac irAbstract In recent years there has been a significant growth in Information Technology usage in human lives Nowadays you may find only a few persons who do not need different aspects of new technologiesincluding IT For example much of affairs like controlling industrial product lines and financialtransaction are done via computers Thus any threat to computers or IT systems is a threat to society From the security professionals viewpoints threats are categorized in the following topics SoftwareBugs Spams Denial of Service Attacks and Malwares Malwares are the most important computerthreats Because Malware could propagate using spams and may also be used to send spams Malwaremay take advantage of bugs and malware may be used to mount DoS attacks Internet users haveexperienced different type of malwares such as Random Scanning active worms email worms and peerto peer worms Due to increasing usage of web services among internet users in recent years malwarewriters focused their attacks on web services thus this could affect lots of users One of the web 2 0services is online social networks In which people all around the world get linked with each other dueto their acquaintance For example Facebook and MySpace are two online social networks Theimportance of these types of networks is that they gather geographically distributed people in one place Thus this feature makes social networks a good target for malware attacks Hackers exploit thetrustiness among users in the social networks for their malicious purposes For example various activeworms are spread among online social networks that had much more infected users than other internetworms Samy the worm that propagated in MySpace Social Network infected 1 million users within20 hours which noticeably had higher infection rate than other infectious worms such as Code Red or Blaster which were spread earlier Since Web is the most popular service of the Internet many usethis service frequently Thus the potential firepower of the infected web users is higher than other typeof services For example if the infected users of Samy worm send a request to download a picturefrom a web host that web host can easily get down because of the large amount of requests that itcannot handle Due to this reason in this dissertation malware propagation in online social networkshas been studied simulated and analyzed Simulation and analyzing of malware propagation in onlinesocial networks helps us to have a better understanding of the propagation dynamics This eventuallyallows us to better understand and estimate the destructive potential of the malware from the givenresults and more effectively design and evaluate the malware propagation countermeasures Key Words Active Worms Online Social Networks XSS

فغاني، محمدرضا

بررسي و شبيه سازي انتشار كدهاي مخرب در شبكه هاي اجتماعي

كرم هاي فعال , شبكه هاي اجتماعي بر خط , xss