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Adware is a type of advertising display software that delivers advertising content potentially in a manner or context that may be unexpected and unwanted by users. Many adware applications also perform tracking functions, and therefore may also be categorized as tracking technologies. Some consumers may want to remove adware if they object to such tracking, do not wish to see the advertising caused by the program, or are frustrated by its effects on system performance
Backdoors may open up ports on the compromised computer, allowing remote access and control of the victim's machine.
Downloaders are programs designed to retrieve and install additional files. Downloaders can be useful tools for consumers to automate upgrades of essential software such as operating system upgrades, browsers, anti-virus applications, anti-spyware tools, games and other useful applications. Unauthorized downloaders are used by third parties to download potentially unwanted software without user notification or consent.
Flooders may provide functionality that makes it possible for an attacker to send massive amount of data to a specific target. The flooding of a target may for an example disturb communication services or make various systems unresponsive. This is similar to a DDoS attack where a massive amounts of calls are launched against a system. A DDos attack may even make large systems unresponsive if the attack is launched from several computer systems that are infected by a DDoS capable Trojan Horse.
Password stealers can steal user passwords on an infected system, compromising system security and user privacy.
ROGUE ANTI-SPYWARE APPLICATIONS
Rogue anti-spyware applications may give exaggerated threat reports on the compromised computer, and then ask the user to purchase a registered version to remove those reported threats.
Trojans (also known as Trojan Horses) are programs that appear to do one thing but actually do another. Trojans may also download additional files to the infected system.
Trojan.Droppers will drop additional files on the infected system. These files are often other trojans or downloaders.
TrojanProxies may open up the infected machine to be used as a proxy server.
Trojan.Spy is a type of malicious program that can steal information such as passwords, surfing habits, credit card details and email addresses.
Worms are network malware, primarily replicating on networks. Usually, a worm will execute itself automatically on a remote machine without any extra help from a user. However, there are worms, such as mass-mailer worms, that will not always automatically execute themselves without the help of a user.
This grouping contains other programs with malicious intentions.