Categories: Trojan,Worm,Backdoor
This loose category includes a variety of Trojans that damage victim machines or threaten data integrity, or impair the functioning of the victim machine.
Multi-purpose Trojans are also included in this group, as some virus writers create multi-functional Trojans rather than Trojan packs.
Worms can be classified according to the propagation method they use, i.e. how they deliver copies of themselves to new victim machines. Worms can also be classified by installation method, launch method and finally according to characteristics standard to all malware: polymorphism, stealth etc.
Many of the worms which managed to cause significant outbreaks use more then one propagation method as well as more than one infection technique. The methods are listed separately below.
Backdoors are the most dangerous type of Trojans and the most popular. Backdoors open infected machines to external control via Internet. They function in the same way as legal remote administration programs used by system administrators. This makes them difficult to detect.
Backdoors are installed and launched without the consent of the user of computer. Often the backdoor will not be visible in the log of active programs.
Once a backdoor has been successfully launched, the computer is wide open. Backdoor functions can include:
- Launching/ deleting files
- Sending/ receiving files
- Deleting data
- Displaying notification
- Rebooting the machine
- Executing files
Backdoors are used by virus writers to detect and download confidential information, execute malicious code, destroy data, include the machine in bot networks and so forth. Backdoors combine the functionality of most other types of in one package.
Backdoors have one especially dangerous sub-class: variants that can propagate like worms.
[Eset]Win32/Forbot.H trojan;
[Computer Associates]Win32.ForBot.J,Win32/ForBot.J.Worm
Visible Symptoms:
Files in system folders:
[%SYSTEM%]\svchosting.exe
[%SYSTEM%]\svchosting.exe
How to detect ForBot:
Files:
[%SYSTEM%]\svchosting.exe
[%SYSTEM%]\svchosting.exe
Removing ForBot:
You can download trial version of "Exterminate-It" antivirus software here, to check your computer instantly.
Or buy it to remove ALL viruses from your computer.Also Be Aware of the Following Threats:
DomainHelper Adware Symptoms
Removing IBar.cn Toolbar
Zlob.Fam.Internet Explorer Secure Plug-in Trojan Cleaner
ClickTheButton Adware Cleaner
Balloon.Pop.Word.Game Trojan Symptoms
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