The following are some well-known viruses.
CodeRed
It is a worm that infects a computer running Microsoft IIS server. This virus launched DOS attack on White House’s website. It allows the hacker to access the infected computer remotely.
Nimba
It is a worm that spreads itself using different methods. IT damages computer in different ways. It modified files, alters security settings and degrades performance.
SirCam
It is distributed as an email attachment. It may delete files, degrade performance and send the files to anyone.
Melisa
It is a virus that is distributed as an email attachment. IT disables different safeguards in MS Word. It sends itself to 50 people if Microsoft Outlook is installed..
Ripper
It corrupts data from the hard disk.
MDMA
It is transferred from one MS Word file to other if both files are in memory.
Concept
It is also transferred as an email attachment. It saves the file in template directory instead of its original location.
One_Half
It encrypts hard disk so only the virus may read the data. It displays One_Half on the screen when the encryption is half completed.
