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2. Computer virus - Wikipedia

   en.wikipedia.org/wiki/Computer_virus

   A computer virus [1] is a type of malware that, when executed, replicates itself by modifying other computer programs and inserting its own code into those programs. [2] [3] If this replication succeeds, the affected areas are then said to be "infected" with a computer virus, a metaphor derived from biological viruses.

3. Fileless malware - Wikipedia

   en.wikipedia.org/wiki/Fileless_malware

   Fileless malware is a variant of computer related malicious software that exists exclusively as a computer memory-based artifact i.e. in RAM.It does not write any part of its activity to the computer's hard drive, thus increasing its ability to evade antivirus software that incorporate file-based whitelisting, signature detection, hardware verification, pattern-analysis, time-stamping, etc ...

4. CIH (computer virus) - Wikipedia

   en.wikipedia.org/wiki/CIH_(computer_virus)

   CIH (computer virus) CIH, also known as Chernobyl or Spacefiller, is a Microsoft Windows 9x computer virus that first emerged in 1998. Its payload is highly destructive to vulnerable systems, overwriting critical information on infected system drives and, in some cases, destroying the system BIOS. The virus was created by Chen Ing-hau ...

5. Ransomware - Wikipedia

   en.wikipedia.org/wiki/Ransomware

   Ransomware is a type of cryptovirological malware that permanently blocks access to the victim's personal data unless a ransom is paid. While some simple ransomware may lock the system without damaging any files, more advanced malware uses a technique called cryptoviral extortion. It encrypts the victim's files, making them inaccessible, and ...

6. USB flash drive security - Wikipedia

   en.wikipedia.org/wiki/USB_flash_drive_security

   Secure USB flash drives protect the data stored on them from access by unauthorized users. USB flash drive products have been on the market since 2000, and their use is increasing exponentially. [1] [2] As both consumers and businesses have increased demand for these drives, manufacturers are producing faster devices with greater data storage ...

7. Brain (computer virus) - Wikipedia

   en.wikipedia.org/wiki/Brain_(computer_virus)

   Description. Brain affects the PC by replacing the boot sector of a floppy disk with a copy of the virus. The real boot sector is moved to another sector and marked as bad. Infected disks usually have five kilobytes of bad sectors. The disk label is usually changed to ©Brain, and the following text can be seen in infected boot sectors: