Definition of Virus
 

DEFINITION OF VIRUS FROM WIKIPEDIA, THE FREE ENCYCLOPEDIA

WEB: http://en.wikipedia.org/wiki/Computer_virus

A computer virus is a computer program that can replicate itself and spread from one computer to another. The term "virus" is also commonly, but erroneously, used to refer to other types of malware, including but not limited to adware and spyware programs that do not have a reproductive ability.
Malware includes computer viruses, computer worms, ransomware, trojan horses, keyloggers, most rootkits, spyware, dishonest adware, malicious BHOs and other malicious software. The majority of active malware threats are usually trojans or worms rather than viruses. Malware such as trojan horses and worms is sometimes confused with viruses, which are technically different: a worm can exploit security vulnerabilities to spread itself automatically to other computers through networks, while a trojan horse is a program that appears harmless but hides malicious functions. Worms and trojan horses, like viruses, may harm a computer system's data or performance. Some viruses and other malware have symptoms noticeable to the computer user, but many are surreptitious or simply do nothing to call attention to themselves. Some viruses do nothing beyond reproducing themselves.

FIRST
I believe that we are in a forum where are the best in the technique of reverse engineering, so how can anyone open an executable that has any doubt be suspect or not without checking your code in a debugger, this to me makes no sense ������.If you have any doubt about debug or not some suspected file, simple DELETE it��....

SECOND
I use only in the net a NOT FREE anti-virus, and a NOT FREE Firewall. There are 15 years I use this same practice, and in this time period no virus,malware,adware,trojan,worm,etc..... infected my PC����.

THIRD
As a reverser, I am a collector of viruses decoded, currently I have 3600 viruses decoded in my personal library.

FOURTH
Hacker and Seller Softs are a shame on the planet, but we help in a way some people by providing them with free softwares, so it is our DUTY to be always one step ahead of any hacker������

Congratulations to all REVERSERS

fourth point is not in totally true.

100% it's correct. Example Dampodecoder

that is keyloger man!

Hi,
simplifying and theoretically speaking, a virus is an assembly-made QUINE -http://en.wikipedia.org/wiki/Quine_%28computing%29- where the output is another media (the infected media, the disk or another file or so on). In its polymorphic version it becomes a multi-quine.