what is a trojan

Famous trojans

• Netbus
• SubSeven

The Netbus Trojan has two parts to it as almost all Trojans do.
There is a Client and a Server. The server is the file that
would have to get installed on your system in order to have
your system compromised. Here’s how the hack would go.

The Hack
Objective: Getting the potential victim to install the server
onto his/her system.

Method 1
Send the server file (for explanation purposes we’ll call the file
netbusserver.exe) to you via E-Mail. This was how it was
originally done.
The hacker would claim the file to be a game of some sort.
When you then double click on the file, the result is nothing.
You don’t see anything. (Very Suspicious)


Note: (How many times have you double clicked on a
file someone has sent you and it apparently did
nothing)
At this point what has happened is the server has now been
installed on your system. All the “hacker” has to do is use the
Netbus Client to connect to your system and everything you
have on your system is now accessible to this “hacker.”



With increasing awareness of the use of Trojans, “hackers”
became smarter, hence method 2.
Method 2
Objective: Getting you to install the server on your system.
Let’s see, how many of you receive games from friends?
Games like hit gates in the face with a pie. Perhaps the game
shoot Saddam? There are lots of funny little files like that.
Now I’ll show you how someone intent on getting access to
your computer can use that against you.
There are utility programs available that can combine the
(“server” (a.k.a. Trojan)) file with a legitimate “executable
file.” (An executable file is any file ending in .exe). It will
then output another (.exe) file of some kind. Think of this
process as mixing poison in a drink.

• common features of Trojans
• TROJAN “HORSE”
• Internet Heartbeat
• Elements, Tags, and Attributes
• Use head and body Appropriately
• HTML is Root
• HTML user friendlyness