It is a type of software that secretly forwards information about a user to third parties without user’s consent. This information includes user’s online activities, files accessed on the computer etc.
It is a type of software that displays advertising banners parallel to the running program. They first spy on and gather information from a user’s computer, and then popup an advertising banner related to the searched information.
A system with spyware / adware installed may shows the following symptoms:-
Tips to prevent these attacks :-
It is a non-replicating programthat appears authorized, but actually performs malicious activities when executed. Attackers use these types of malicious program to steal a user's credentials, or they may simply destroy programs.
It is hard to detect because it is designed to conceal its presence by performing its functions properly.
Tips for Prevention:-
Worms:-Worms are self-replicating program that does not need to attach to a host file. Unlike viruses, worms are self-executive. They have the ability to spread over a network and can initiate destructive attacks in a short period of time.
Some typical examples of a massive attack causes network outages are: