Type of "Ghostware"
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Spyware
Spyware is a general designation of malicious programs, which makes use of the plug-in to attack the computer without the permission of users. And then the computers will be abnormal. Spyware includes Adware, Pornoware and so on.

Hacktools
Many hacktools do not destroy host computer advisedly. However they may attack other computer with host computer as hop.

DoS:
Denial of Service, a method of attack that uses remote Trojans to flood a target's internet connection.

Flooder:
Also known as DDOS Program. The Program installs itself and waits for commands to send data to a target's Internet address.

DDoS:
Distributed Denial of Service A method of attack that uses multiple remote Program to flood a target's Internet connection.


Trojan
Trojan has many types and complex actions.

Trojan.Bomb:
This means the Trojan deletes important files or tries to make the target's system unbootable.

Trojan.psw:
This type of Trojan is called Password Stealer, it makes copies of passwords stored in the system, like email, ICQ, etc. and saves them to a file.

Trojan.irc:
The Trojan installs a backdoor script in the IRC client.

Trojan.mIRC:
The Trojan installs a backdoor script in the IRC client called "mIRC".

TrojanDropper:
This is the most basic Trojan. It simply unloads another Trojan or sets up Trojans to an target computer. Often the TrojanDropper packs the second Trojan with another file.


Backdoor
Also known as RAT (Remote Access Trojan). This is the most common type of ghostware. It includes a server part and a client part. The server part opens one or more ports on the target computer and waits for a controlling client to connect.

These ghostware typically share the same basic commands set and operation mode. They often attempt to contact the controller with an email or ICQ message when ready.

Some backdoor programs have no special client. They make the target computer ftp, web, or telnet server without notice.

Worm
Worm copies itself over network by email, IRC, mIRC, etc.

I-worm: Internet worm, it gets around with email, ftp and web service.

IRC-worm: Gets around with IRC channel.

mIRC-worm: Gets around with mIRC channel.

Webdialer
This type of program can change ISP dialer number into a long distance telphone with very expensive price.

Keylogger
All keystrokes are intercepted and logged to a file in order to collect passwords or other sensitive information. A second Trojan may be needed to collect the data file.

Joke
Joke Program is a harmless program. It only displays something like virus or system error does. It often makes user very tense.