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What A Trojan Horse Virus Can Do To Your PC and By Downloading Your Free Registry Cleaners and Spyware
You Can Take The Right Precautions to prevent your Money From Being Ripped From Your Pockets....

Trojan Horse Viruses:

Perhaps the simplest kind of malicious program is a Trojan horse.  The Trojan horse will try to appeal to in
users that are interested with some useful functionality to entice a user to run the program.  In other cases, the
malicious hackers leave behind a Trojan nice to versions of a real toll or told to camouflage their activities on a
computer, so they can retrace their steps to the comprised system and perform list his activities later.  For
example, all UNIX based system, hackers often leave a modified version of ps a tool to display a process list, to
hide a particular process ID, which can relate to another backdoor Trojan process.  Later on, it might be difficult
to find such changes on the comprised system.  

These kind of Trojans are often called user mode root kits.  The attacker can easily manipulate the toll by
modifying the source code of the original toll at a certain location.  At first glance, the minor modification is
extremely difficult to locate.  Probably the most Trojans or famous Trojans horses is the AIDS Trojan disc, that
was sent to about 7000 research organizations on a diskette.  When the Trojan was introduced on the system,
it scrambled the name of all files except a few and feel good and decent areas of the disk completely.  The
program offers a recovery solution in exchange of abounding.  

Dust, malicious cryptography was born.  The author of the Trojan horses was casher shortly after the incident.  
Dr. Joseph pop, 39 at the time, a zoologist on Cleveland, Ohio, was prosecuted in the UK.  The file name
scrambling function of AIDS Trojan disc was based on two substitutions tables.  One was used to encrypt the
file names in it other was used to encrypt the file extensions.  At some point in history of cryptography, such an
algorithm was considered unbreakable.  However, it is easy to see that the substitution ciphers can be easily a
tax based on the use of statistical methods.  The distribution of common words.  In addition, if given enough
time to the offender can disable or disassemble the Trojans code and pick the tables from its code.  There are
two kinds of Trojans, 100% Trojan code, which is easy to analyze.  And a careful modification of an original
application with some extra functionality, some of which belong to the backdoor or root kit subclasses.  This
kind of Trojan is more common on open source systems because of the attacker can easily insert backdoor
functionality to existing code.
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