Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Im
Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an(71)from a friend who asks you to open it. This is what happens with Melissa and several other similar email(72). Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages(73)As administrators seek to block dangerous email attachments through the recognition of well-known(74), 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 nm 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(75)access to your network.
A.attachment
B.packet
C.datagram
D.message
解析:Melissa和LoveLetter利用了朋友和同事之间的信任。设想你收到了一个附件,朋友要求你打开它。这就是Melissa和其他类似的电子邮件蠕虫危害的方式。一旦被运行,这种蠕虫常常就从受害人的地址簿、以前的电子邮件、Web页面缓存区等地方发现邮件地址,并且把它们发送出去。在管理人员通过识别众所周知的扩展名企图阻挡危险的email附件时,病毒的作者们则使用了其他的扩展名来破坏这种保护。可执行文件(.exe)被重新命名为.bat和.cmd,再加上其他的扩展名,而且仍然可以运行,成功地危害目标用户。黑客们经常试图穿透网络发送一种像是flash影像的附件,当这种flash演示引人入胜的动画时,同时就在后台运行命令来偷窃你的口令,给了那些解密高手访问你的网络的机会。
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