Viruses, Worms & Trojan Horses

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Presentation transcript:

Viruses, Worms & Trojan Horses

What Are viruses? They are programs which can destroy or cause damage to data stored on a computer system and to the computer itself! Virus program must be executed in order to infect a computer system. Viruses can attach themselves to other programs in order to ensure that this happens.

Common Symptoms of Virus Infections Displaying unwanted messages Unusual visual or SFX (sound effects) Loss of Data from a storage medium Computers restarting unexpectedly Unwanted generation of emails

Viruses can ... Corrupt or delete data Disable the computer by changing the operating system Cause silly messages to be displayed or sounds to be produced Use your computer to ATTACK other computer by generating spam (junk emails) or overloading a company website with data.

WORMS Worms operate differently to viruses Worms can spread themselves to other computers without needing to be transferred as part of a host program. The first time a user may notice the presence of a worm is when the computers memory UNEXPECTEDLY fills up

Example of an email worms… Mimail.I and Mimail.F are email worms disguise themselves as an email from the PayPal on-line payment service and try to steal credit cards info. This method of fraud is known phishing

TROJAN HORSES Trojan horse, also known as Trojan, describes a list of computer threats (malware) that appear to perform good functions, but actually performs malicious functions that allow unauthorized access to the hosting machine FOR EXAMPLE – If a program is designed in such a way, it could open a gateway for hackers to control and attack the computer of the user, then that program is said to be a Trojan horse THATS WHAT A REAL TROJAN HORSE LOOKS LIKE!

Lisa Robertson THANKS FOR WATCHING By Jamil Tariq , Mariya Rasul and Jacqui Crooks  Best teacher ever!!!!!!!! (L)