Backdoor trojans
| Backdoor trojans |
Destructivity:  Spreading:  Overall risk:
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| • Detected by virus detection files published: 11/6/2001 | • Type: Backdoor |
| • Virus characteristics first published: 11/6/2001 | • Spreading mechanism: Other |
| • Virus characteristics latest update: 12/17/2003 | • Overall risk: Medium |
| Virus type |
Spreading mechanism |
Destructivity and payload |
Additional descriptions |
Detection and removal |
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Most backdoor trojans come in several parts. The victim usually run the server part in good faith, usually believing that it is a cool screensaver, a funny animation, or, not uncommon, something pornographic. The user will normally not see anything unusual to begin with. However, the server sets the users machine open for remote control. Machines that have been affected this way will often "advertise" their presence to malicious persons. When such a machine is being remote controlled by a hacker, it may exhibit very strange symptoms: CD-ROM door opening and closing of itself, strange messages popping up, files appearing and disappearing etc. The hacker may listen in on whatever is typed on the keyboard and shown on the screen, and also obtain sensitive documents, passwords and other data. Backdoor trojans are very common, and another good reason why you should not run any programs that come from untrusted sources. |
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