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Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an(26)from a friend w
Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an(26)from a friend w
admin
2013-05-11
44
问题
Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an(26)from a friend who asks you to open it. This is what happens with Melissa and several other similar email(27). Upon running, such worms usually proceed to send themselves out to email addresses from the victim’s address book, previous emails, web pages(28).As administrators seek to block dangerous email attachments through the recognition of well-known(29), virus writers use other extensions to circumvent such protection. Executable (.exe)files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the(30)access to your network.
选项
A、cracker
B、user
C、customer
D、client
答案
A
解析
Melissa和Love Letter病毒利用了朋友或同事之间的信任。设想一下,你从你的一个朋友处收到一个附件(attachment),而你的朋友又让你打开它。这个就是Melissa和其他几个相似的邮件蠕虫(worms)发生的原因。一旦运行,这些蠕虫就随已被感染者的邮件把它们自己发送出去,而接收者的地址是从被感染者的地址簿、以前的邮件或网页的缓存(caches)等处获得的。管理员试图通过识别已知的扩展名(extensions)来阻塞有危险的邮件附件,而病毒的创造者则使用其他的扩展名来绕过这种保护。可执行文件(. exe)的扩展名文件能被重命名以. bat和. cmd为扩展名的文件,这样就能被成功地运行并且感染所要感染的计算机。通常,黑客通过发送一个附件来渗透网络,这个附件可能看起来像一个FLASH电影,在显示有趣的动画的同时也在后台运行指令以盗取你的密码,然后黑客(cracker)就可以访问你的网络了。
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