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Viruses
What is a virus?
•"A parasitic program written intentionally to enter a computer without the users permission or knowledge. The word parasite is used because a virus attaches to files or boot sectors and replicates itself, thus continuing to spread. Though some virus's do little but replicate, others can cause serious damage or effect program and system performance. A virus should never be assumed harmless and left on a system."
-Symantec
-Symantec
•A computer virus must piggyback on top of some other program or document in order to launch. Once it is running, it can infect other programs or documents
•People write computer viruses. A person has to write the code, test it to make sure it spreads properly and then release it. A person also designs the virus's attack phase, whether it's a silly message or the destruction of a hard disk
▫Viruses don’t mess up people’s computers, people mess up people’s computers
•Computer viruses and worms are characterized by their ability to self replicate. The modern computer virus was conceived and formalized by Fred Cohen as a USC graduate student in 1983. Cohen wrote and demonstrated the first documented virus in November 1983
•“Computer Virus” is a term commonly used to refer to malware.
•“Computer Virus” is a term commonly used to refer to malware.
•Malware includes: computer viruses, worms, trojan horses, rootkits, spyware, crimeware, dishonest adware, and other malicious and unwanted software
•A virus is not a worm or trojan horse
▫A computer worm is a program that duplicates itself by using a network to send copies of itself to other computers. Unlike a virus, it does not need to attach itself to an existing program. Worms almost always cause at least some harm to the network, if not by using up bandwidth, whereas viruses almost always corrupt files on a targeted computer.
▫ The Trojan horse, also known as trojan, describes a class of computer threats that appear to perform a desirable function but in fact perform undisclosed malicious functions that allow unauthorized access to the host machine, giving them the ability to save their files on the user's computer or even watch the user's screen and control the computer.
Different types of viruses:
for in depth details about each virus.
Pros and Cons:
Different types of viruses:
•Resident Viruses
•Direct Action Viruses
•Overwrite Viruses
•Macro Viruses
•Directory Viruses
•Polymorphic Viruses
•Companion Viruses
•FAT Viruses
Click on http://www.buzzle.com/articles/different-types-of-computer-viruses.htmlfor in depth details about each virus.
Pros and Cons:
•Pros
"White Hat" hackers can be hired/used to reveal security flaws for major companies.
They also can be used to test out the reliability of newly created firewalls.
They can help us protect against the "bad hackers" and other malicious viruses that they know about
"White Hat" hackers can be hired/used to reveal security flaws for major companies.
They also can be used to test out the reliability of newly created firewalls.
They can help us protect against the "bad hackers" and other malicious viruses that they know about
•Cons
▫They destroy people’s data
▫Can shut down businesses or even the internet
▫Can be used to hack into personal information, violating privacy
▫Can turn computers into zombies and create botnets to target websites
Issues and Impacts:
Issues and Impacts:
•Viruses make the internet more dangerous
▫People have to get firewalls, passwords, and protection
•Hackers take away control from the computer users.
•The reliability of the computer’s firewalls and usage can be questioned
▫How do you know what your computer is doing?
AnthonyHoHoHo |
Latest page update: made by AnthonyHoHoHo
, Apr 13 2009, 11:42 AM EDT
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