V483 Virus

Virus Name: V483 Aliases: V Status: Rare Discovered: August, 1991 Symptoms: .COM & .EXE growth; system hangs; file date/time changes Origin: Unknown Eff Length: 483 Bytes Type Code: PRAK - Parasitic Resident .COM & .EXE Infector Detection Method: [Not in Certification Set] Removal Instructions: Delete infected files General Comments: The V483 virus was received in August, 1991. Its origin is unknown. V483 is a memory resident infector of .COM and .EXE programs, including COMMAND.COM. When a program infected with V483 is executed, this virus will install itself memory resident. After becoming memory resident, it will infect the next .COM or .EXE program which is executed. If COMMAND.COM is executed, it will become infected. At this time, the system will become hung once the virus has completed infecting the program the user was attempting to execute. Programs infected with V483 will have a file length increase of 483 bytes. The virus will be located at the end of the infected program. The file's date and time in the DOS disk directory will also have been updated to the system date and time when infection occurred. V483 will also overwrite the first 24 bytes of infected files with hex "FF" characters, thus permanently corrupting them. Infected programs will usually not execute properly.