AdClicker - Repeatedly accesses websites that are funded by advertising. Adware - Installs advertising software but does not ask permission. BackDoor - Provides remote access or control through the Internet or network. Dialer - Dials a phone number without asking for permission. DDoS - Operates as a Distributed Denial of Service component. Del - Deletes files. Downloader - Downloads software from the Internet, usually to deliver backdoors, password stealers, and sometimes viruses. Exploit - Uses a vulnerability or a software defect. FDoS - Denotes a Flooding Denial of Service component. KeyLog - Logs keystrokes for immediate or future transmission to the attacker. Kit - Denotes a program designed for creating a virus or Trojan horse program. MultiDropper - Drops several Trojan horse programs or viruses (often several different ‘backdoors’). Nuke - Uses defects in software installed on a remote computer to bring it down. ProcKill - Terminates the processes of anti-virus and security products. May also delete files associated with such applications. PWS - Steals a password. Reboot - Reboots the computer. Reg - Modifies the Registry in an undesirable fashion without asking questions. For example, reduces the security settings or creates abnormal associations or sets. Spam - Acts as a spamming tool. Spyware - Monitors browsing habits or other behavior and sends the information out, often for unsolicited advertising. Uploader - Sends files or other data from the computer. Vtool - Denotes a program used by virus writers or hackers for developing software. Zap - Wipes all or part of a hard disk.