Today’s we want to knowledge gather different types’ of malicious software………….
Malicious Software Type:
There are several major types of malicious software.
A virus is a piece of code that spreads from one computer to another by attaching itself to other ﬁles. The code in a virus corrupts and erases ﬁles on a user’s computer, or performs other destructive or annoying tasks, when the ﬁle to which it was attached is opened or executed. Viruses and other types of malicious code are frequently introduced via email attachments. The term virus is often used as an umbrella term to refer to many types of malicious software.
A worm is a piece of code that spreads from one computer to another on its own, not by attaching itself to another ﬁle. Like a virus, a worm can corrupt or erase ﬁles on your hard drive or perform other destructive or annoying operations.
A Trojan, or Trojan horse, is malicious code that masquerades as a harmless ﬁle. When a user executes the Trojan, thinking it is a legitimate application, it can perform damaging or annoying operations. Or, it can continue to masquerade as a legitimate program, while in the background it captures input from the user and transmits the data to an attacker.
A logic bomb is a piece of code that sits dormant on a user’s computer until it is triggered by a speciﬁc event, such as a speciﬁc date. Once the code is triggered, the logic bomb “detonates,” erasing and corrupting data on the user’s computer or performing other destructive or annoying operations.
Spyware is unwanted software that runs in the background to monitor system activities and send collected personal user data to a third party.
Adware is unwanted software loaded onto a system for the purposes of presenting commercial advertisements to the user. The adware can run in the background and collect data about the user in order to present customized advertisements. The adware can also function as spyware. The user is often unaware that the adware has penetrated the system. The adware itself can create annoyances or adverse system conditions, or the adware can be a vector for introducing other types of malicious software.
Grayware is a general classiﬁcation for any unwanted software that produces harmful or annoying effects. A joke program that makes the computer screen image vibrate or a drive door open or shut would be a form of grayware.
In the electronic world, spam is generally taken to mean unsolicited commercial email. Spam creates nuisance conditions by ﬁlling user mailboxes with unwanted messages, and impedes email system performance by ﬁlling up email servers’ stor- age areas and generating excessive network traffic. Although not technically software, spam travels via email software, which is why it is often considered to be a type of malicious software.
A hoax is any message containing incorrect or misleading information that is disseminated to multiple users through unofficial channels. Hoaxes do not have to be electronic, although electronic distribution systems facilitate their propagation. Although not technically software, some hoaxes travel via email software, which is why they are often considered to be a type of malicious software. Hoaxes can be relatively benign, such as an email letter soliciting “get well” cards for a ﬁctitious ill child. In this case, the main threat is from users who widely disseminate the hoax email, clogging communications systems and annoying other recipients.
However, hoaxes often improperly alert users to the existence of unsubstantiated virus threats. Rather than validating the information, users often react by following instructions in the hoax that might cause system damage or introduce further malicious software.