Access control threats
o Viruses spread via a host program
o Worms spread independently from other files
Other types of malware
o Trojans look like real programs but they are harmful
o Popups
o They can change the look of the desktop, and make it look bad
o They can delete files
o They can steal files
o They can spread other malware
Zombies and botnets
o Zombie
A computer is referred to as a zombie once it has been infected and taken
over by the malicious software
o Botnet
A number computers infected by malware that have been networked and
can be controlled without the owners knowing
They are extremely valuable to hackers as you can perform large scale
malicious attacks
Countermeasures
o Install and Update anti-virus and anti-spyware software
o Install patches on operating systems and browsers
o Don’t download from unknown sites
o Scan files that are downloaded
o
o Viruses spread via a host program
o Worms spread independently from other files
Other types of malware
o Trojans look like real programs but they are harmful
o Popups
o They can change the look of the desktop, and make it look bad
o They can delete files
o They can steal files
o They can spread other malware
Zombies and botnets
o Zombie
A computer is referred to as a zombie once it has been infected and taken
over by the malicious software
o Botnet
A number computers infected by malware that have been networked and
can be controlled without the owners knowing
They are extremely valuable to hackers as you can perform large scale
malicious attacks
Countermeasures
o Install and Update anti-virus and anti-spyware software
o Install patches on operating systems and browsers
o Don’t download from unknown sites
o Scan files that are downloaded
o
