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A computer virus generally contains three parts: the infection mechanism, which finds and infects new files, the payload, which is the malicious code to execute, and the trigger, which determines when to activate the payload. [ 33] Infection mechanism. Also called the infection vector, this is how the virus spreads.
The WannaCry ransomware attack was a worldwide cyberattack in May 2017 by the WannaCry ransomware cryptoworm, which targeted computers running the Microsoft Windows operating system by encrypting data and demanding ransom payments in the Bitcoin cryptocurrency. [ 4] It was propagated by using EternalBlue, an exploit developed by the United ...
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 ...
An example of this is a portable execution infection, a technique, usually used to spread malware, that inserts extra data or executable code into PE files. [34] A computer virus is software that embeds itself in some other executable software (including the operating system itself) on the target system without the user's knowledge and consent ...
Sality is a family of polymorphic file infectors, which target Windows executable files with the extensions .EXE or .SCR. [1] Sality utilizes polymorphic and entry-point obscuring (EPO) techniques to infect files using the following methods: not changing the entry point address of the host, and replacing the original host code at the entry point of the executable with a variable stub to ...
The EICAR Anti-Virus Test File[ 1] or EICAR test file is a computer file that was developed by the European Institute for Computer Antivirus Research (EICAR) and Computer Antivirus Research Organization (CARO) to test the response of computer antivirus (AV) programs. [ 2] Instead of using real malware, which could cause real damage, this test ...
A compression virus is an example of a benevolent computer virus, invented by Fred Cohen. It searches for an uninfected executable file, compresses the file and prepends itself to it. The virus can be described in pseudo code [1] {loop:file = get-random-executable-file; if first-line-of-file = 01234567 then goto loop; compress file;
Polymorphic virus which infects systems by inserting fragments of its code randomly into executable files. Brain: Pakistani flu: DOS Boot sector virus 1986-01 Lahore, Pakistan: Basit and Amjad Farooq Alvi: Considered to be the first computer virus for the PC: Byte Bandit: Amiga Boot sector virus 1988-01 Swiss Cracking Association
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