The history of viruses
There are lots of opinions on date of first virus birth. I know for 100% that Babbage computer never had them but Univac1108 and IBM-360/370 already had ‘Christmas tree’ and ‘Pervading Animal’. So, the first virus was born somewhere in early 70s or even late 60s though it was not called “the virus” yet and let’s finish the conversation about the “dinosaurs”.
I would like to tell about the modern history of viruses such as “Brain”, “Vienna”, “Cascade” and so on. Those who started using IBM-PC in 80s might still remember those viruses pandemic in 1987-89 when letters were mixed on displays and poor users rushed to technicians to repair their monitors. It’s vice versa now when hard drive just dies because of wearing out and we think of some new virus. Then our PCs started playing “Yankee Doodle” but we didn’t rush to fix our speakers for it was obvious it was the virus (in fact about 10 of them).
Then viruses started infecting files. “Ping-Pong”and “The Brain” detected the viruses’ victory over Boot-sectors. So, the antiviruses were developed. The first Russian antivirus was ANTI-KOT named after its developer Oleg Kot and it was able to detect 4 viruses (American SCAN appeared in Russia later). I would recommend here to erase your copies of ANTI-KOT as this program drives you nuts but doesn’t do any good as this one detects “The Time” virus by MS DOS combination in the end of file and some other antiviruses link this combination to all com. and exe. files.
Pay attention that in Russia and western countries the viruses progressed differently. First western virus was the boot-virus “Brain” and then the file viruses “Vienna” and “Cascade” appeared. Russian users in contrast first had the file ones and then the boot ones.
As time passed the viruses had increased in number. They reminded each other as they were getting into a memory, sticking to files and sectors and periodically killing files, diskettes and hard drives. “Frodo.4096” as the first stealth virus was a complete disaster. When DOS addressed the infected files the virus changed information the way those files appeared uninfected. But it was just an add-on to MS-DOS virus. Shortly viruses got into DOS core (stealth “Beast.512”). Invisibility allowed those viruses to progress as in summer of 1991 “Dir_II” infected lots of computers as a plague. “Oh, Gosh!” said everybody who tried to break the virus code.
Though it appeared to be easy to beat the stealth-viruses as you just had to clear your RAM and the virus became detectable than. The self-coding viruses brought more problems for to detect and remove them the special subprograms had to be developed and tested. But no one paid attention to that until the birth of new generation viruses that are called “polymorphs”. Those viruses use the other invisibility approach as they code themselves and in decoding use commands that never repeat with other files infection.
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