Some Computer Viruses In History
Below is a MRR and PLR article in category Computers Technology -> subcategory Other.
Notorious Computer Viruses in History
Summary
Computer viruses deceive systems into replicating their malicious code, spreading via networks, electronic bulletin boards, and shared devices. Created by programmers for various reasons, they lead to widespread disruption and concern.
How Viruses Operate
Once detected, an infected computer must be isolated, and the virus removed before resuming use. Viruses are essentially programs attached to other software, activated by the host program. They replicate and spread through various means, including data transfer.
Types of Viruses
Parasitic Viruses:
These attach to programs and activate when the host is executed. They spread when infected programs are copied. Examples include "Jerusalem" and "Datacrime."
Boot Viruses:
These target the boot sector of disks, replacing the first sector with their code. They're loaded when the computer starts, installing themselves and subsequently loading the original program. They can occupy the DOS or master boot sector on a hard disk.
Notable Computer Viruses
C-Brain (1986):
Created by Pakistani brothers Amjad and Basit to combat software piracy, this virus affected millions of PCs by residing in the boot sector.
Macmag:
Targeting only Apple Macintosh computers, this virus caused minimal damage, displaying a peace message before self-destructing.
Cascade:
Infected IBM-compatible PCs, causing screen letters to fall as though cascading. A parasitic virus, it spreads through copied programs.
Jerusalem (1987):
Found in Hebrew University, this virus activated on specific dates (e.g., Friday the 13th), deleting files. It's similar to Cascade, targeting COM and EXE files.
Datacrime/Columbus (October 13th, 1989):
Similar to Jerusalem, this virus destroyed track zero on hard disks, rendering data unreadable. Fortunately, it was identified early, limiting damage.
Logic/Time Bombs:
These are triggered by specific events, causing software crashes. Often inserted by insiders within a company, they trigger at a predefined time or condition.
These historical viruses showcase the significant impact of malicious code, emphasizing the importance of computer security and vigilant antivirus measures.
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