![all virus in windows 93 simulator all virus in windows 93 simulator](https://cdn.windowsreport.com/wp-content/uploads/2018/11/WIndows-XP.jpg)
The resulting malware is generally meant to work against known security weaknesses in widely-used programs or operating systems, on the basis that someone, somewhere will not yet have his system patched, and the larger the installed base, the higher the number of unpatched systems and the higher the chance of getting a sufficiently large number of them infected (a measurement of the success of a virus). Having said this, there are virus building kits, built by (groups of) black hat hackers as per the above description, allowing essentially anyone with nefarious purposes, capable of wielding a mouse, and only little if any knowledge of the target system (usually called "script kiddies") to whip up a virus, worm or Trojan horse in a relatively limited time. Profound knowledge in computer science (being a programmer for a living).Most users are lazy with updates (or company policies might get in the way), allowing the virus to spread to versions of the program missing the security update. If you are fast, you can act then and write a virus.
#All virus in windows 93 simulator update
More commonly, a virus author waits until a security update by the software developer uncovers a security hole in the program. In order to discover and exploit such holes, you need to study the software in question - a pretty difficult thing to do if you don't have the source code, access to a copy of the target system allowing you to run a selection of penetration testing tools against it (doing so on the real target may well alert its owners that some dirty work is afoot), or at the very least access to the executable file. Just to clear things up: Computer viruses exploit security holes/vulnerabilities specific to certain programs - preferably server programs, so you can do a remote attack. There's no need to find a vulnerability in the system to exploit, no need for a development environment, heck you don't even need to know if the alien computers use ones and zeros (maybe they use threes, tens and tomatoes). While physicists might be more skilled to do so, even journalists demonstrate the skills to write computer viruses that can wipe out a complete technologically advanced alien fleet within minutes. In fiction, anyone can write a computer virus overnight.