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Virus là một chương trình tự sao chép sản xuất code riêng của mình bằng cách đính kèm bản sao của nó vào các code thực thi khác. Một số virus ảnh hưởng đến máy tính ngay sau khi code của nó được thực hiện ,một số virus khác nằm im cho đến khi một hoàn cảnh hợp lý rồi mới được kích hoạt. | Virus và Worm Mô-đun 7 Certified fM EH Ethical Hacker GVHD Lê Tự Thanh Nhóm 19 Đặng Ngọc Thông Võ Minh Thành ƯTv exo today.com December 20. 2010 11 56 AM This doesn t mean that there are fewer threat or that the cyber-crime market 1 shrinking. Qutethe DfXJDUto it cortnuci to expand ano by the end or 20LC we iH hive logged nor new threats in Colecttve In te I licence than in 2009. Yet it seems as though hackers are applying econcrrres or scale reusing c4c malicious code or pnorrtj ng the distribution of existing threats over the creation new ones . Corrons concluded. One third of existing computer viruses were created in Jan-Oct 2010 Panda PandaLabs Panda security s anti-mahvare laooratory stated that. 1ft the nrst ten months of the y ar he number of th-eats created and distributed occountforo-ie th-rd of all viruses that exist. Theta means that 34 p O Cort of j ma ware over crcatod has appeared in the last ton months. The company s toiler live intelligence database which automaticaly detects analyses and classifies 99.4 percent of the threat received now has 114 T il Sen separate Iles. 60 million of whch are malware viruses worms trojans ard other threats The report further added that up to October tfrrs year some 20 m Ion new strans cf maMrare haw been created including new threatsand vanants of exiUing fami. i the some amount ai in the whote of 2009. T e average number of new threats created every day has riser from 55.000 to 63.000. Despite these dramatic ftumbe-5 the speed with whKh the number of new th-eacs IS growing has dropped since 2CC9. Since 2003 new threats bcTve increased at a rate of 100 percent or more. Yet so far in 2010 the rate of growth IS around 50 percent explains Luis Corrons. technical director Panda-abs. The company further informed that athough more malicious software IS created. Its lifespan s shorter. 54 percent of malware samples are act ve for just 24 hours as opposed to the lifespan of ifiwr J monthI OTìpyữđ by the threats of previous
