Computer Science, asked by Anonymous, 9 months ago

write few lines about these viruses -:
1. Saturday the 14th
2. Happy Birthday 30
3. Friday 13
4 Jerusalem B

Answers

Answered by deepak20rana20
4

Answer:

4)Jerusalem is a logic bomb DOS virus first detected at Hebrew University of Jerusalem, in October 1987.[1] On infection, the Jerusalem virus becomes memory resident (using 2kb of memory), and then infects every executable file run, except for COMMAND.COM.[2] COM files grow by 1,813 bytes when infected by Jerusalem and are not re-infected. Executable files grow by 1,808 to 1,823 bytes each time they are infected, and are then re-infected each time the files are loaded until they are too large to load into memory. Some .EXE files are infected but do not grow because several overlays follow the genuine .EXE file in the same file. Sometimes .EXE files are incorrectly infected, causing the program to fail to run as soon as it is executed.

3)There wasn’t a specific method to spread the virus, but that it was done through normal systems like floppies, CD-ROM or attachments in emails.

How It Works?

– Infects files with extensions of COM, EXE or SYS and increases in size whenever the file is executed

– It reduces the memory available on the computer

– Causes your computer system to slow down

– Every the Friday the 13th the virus is activated, and eliminates computer files that are used that day

2)Today is a special date in IT history. Thirty three years ago an American called Fred Cohen created a program that could infect the computer and gain control of the system. It wasn’t, however, until later that the term "computer virus" was coined by Leonard Adleman who was Cohen’s academic adviser and the co-inventor of the RSA cryptosystem. For the last few decades, viruses have amused and frightened humanity, and have also become a source of great problems for large companies and deprived millions of users, access to their computers. Our "celebratory" article today will, with the help of ITMO experts, explore how this time of malware has evolved and dispel myths associated with it.

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Answered by SugaryHeart
3

Answer:

Jerusalem is a logic bomb DOS virus first detected at Hebrew University of Jerusalem, in October 1987.[1] On infection, the Jerusalem virus becomes memory resident (using 2 kb of memory), and then infects every executable file run, except for COMMAND.COM. COM files grow by 1,813 bytes when infected by Jerusalem and are not re-infected. Executable files grow by 1,808 to 1,823 bytes each time they are infected, and are then re-infected each time the files are loaded until they are too large to load into memory. Some .EXE files are infected but do not grow because several overlays follow the genuine .EXE file in the same file. Sometimes .EXE files are incorrectly infected, causing the program to fail to run as soon as it is executed.

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Hope it helps!!

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