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) .
A. cracker B. user C. customer D. client
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.
参考答案: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。