Adware
Typically, adware components install alongside a shareware or freeware application, after you have provided initial consent and bring targeted advertisements to your computer. These advertisements create revenue for the software developer. Adware displays web-based advertisements through pop-up windows or through an advertising banner that appears within a program's interface and can be very annoying.
Browser Helper Objects (BHOs)
A Browser Helper Object (BHO) often appears as a helpful browser toolbar within Microsoft Internet Explorer (IE). Malicious BHOs can change your default home page to point to some other site or send histories of your web-browsing habits to third-parties for the purposes of targeted advertising.
Browser Hijackers
Browser hijackers can take control of your web browser. They may alter your browser settings, change your default home page to point to some other site and are capable of sending personal information to third-parties. They may not be detected by firewall software as they are capable of appearing as part of IE itself. Due to the variety of functions a browser hijacker can possess, it can be categorized as a Trojan.
Dialers
Generally, this is software installed on your PC that dials a phone number. Some dialers connect to Internet Service Providers (ISPs) and are designed to provide genuine assistance. However, malicious dialers can attempt to connect you to long-distance or toll numbers without your consent, resulting in expensive phone bills.
Keyloggers
Also known as 'key loggers' or 'keystroke loggers', these are programs that run in the background on your computer and are capable of recording every keystroke you make on your keyboard. Keyloggers can store such information, which could very well include personal details and passwords that you have typed into your computer, such that it can later be retrieved by third-parties.
Layered Service Providers (LSPs)
LSPs are pieces of code that are used to monitor, intercept and control communication between WinSock and the Internet application that calls WinSock (e.g. your Internet Browser). Malicious LSPs can be used to steal information that you submit through the Internet application and direct it to a false web site posing as a genuine one. (This is known as phishing).
Malware
A generic term used to encompass malicious spyware, adware, Trojans, browser hijackers, keyloggers, dialers and tracking cookies.
Peer-to-peer computer network
Generally, any network that uses direct connections between client computers (i.e. peers) and does not rely on dedicated servers for communication. Such software is useful for sharing files between client computers.
Malware
A generic term used to encompass malicious spyware, adware, Trojans, browser hijackers, keyloggers, dialers and tracking cookies.
Spyware
A stealthy application that makes use of your Internet connection, gathering and transmitting information on various activities you conduct on your computer to third-parties. This information is often collected and sent without your knowledge or consent. Like adware, spyware often installs as a third-party component bundled with a freeware or shareware application, which can make the distinction between the two somewhat ambiguous.
Tracking cookies
Internet browsers write and read cookies, which are small text files with small amounts of data (such as web site settings) which are placed onto your computer by visiting certain web sites. In many cases, cookies provide a benefit to users as they can retain settings for when you next visit a web site. In some instances, however, cookies are used to consolidate and track your behavior across different web sites, providing marketers with information about your web browsing habits.
Like spyware, Trojans (also known as Trojan horses) can slip into your system and run without your knowledge. However, they are capable of possessing a variety functions. For example, some use your computer's modem to dial long-distance or toll numbers (like a dialer), potentially generating expensive phone bills. Unlike viruses and worms, Trojans do not replicate themselves.
WinSock
WinSock (short for Windows Sockets) provides the interface between the Windows operating system and TCP/IP.
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