Adware, spyware, worms, and spam
Adware is used for marketing purposes. Adware can be downloaded to your system while browsing websites. Adware is a generic software application in which advertising banners can be displayed while running other applications.
Spyware collects information like browsing habits, and sends it to a remote site without the user’s knowledge or permission. Additionally, spyware can download malicious programs from the internet to user’s computer by itself. Spyware, works like adware but can sometimes be a separate program that is installed unknowingly. It’s usually installed when users download a freeware program or application.
Spam (electronic junk) refers to annoying messages that flood the internet with copies of itself. Spam is usually repeatedly unsolicited advertising, and mostly seen in emails. Spam emails often include phishing links in disguise of familiar weblink.
Worms are nasty programs that make copies of themselves on the local drive, network shares, etc. As a result, worms take up space in the hard drive and consume network bandwidth. Worms also, consume CPU usage, which make PC run slower. Worms do not harm data and files on computers. Unlike viruses, worms do not need to attach themselves to an existing program, exploiting vulnerabilities in operating systems.
Virus is a program that can damage and alter files or data. Virus have the capability of deleting data on computer, and replicating themselves, as a result, becoming more dangerous.
Trojans are not viruses, and they do not replicate themselves. However, trojans are dangerous as they open up backdoors to your computer, which lead attackers to your system to collect confidential and personal information.
Cookies are used by websites to track visitor information. Cookies will keep track of browsing information, and they are sometimes used by malicious people or companies to get personal information such as bank account details, credit card information, etc. Cookies are stored on computer in cookies folder as a plain text file
Misleading applications or ads produce false security status like notifying your computer is infected by some malware. The application leads users to download unreliable tools to remove the threat. But when downloading, another notification would pop up with payment information. In this way, user’s bank account and other personal information might be gathered unknowingly.