CV4 Virus

Virus Name: CV4 Aliases: COMVirus 1.0 V Status: Rare Discovery: July, 1992 Symptoms: .COM file growth; message displayed Origin: Unknown Eff Length: 321 Bytes Type Code: PNCK - Parasitic Non-Resident .COM Infector Detection Method: ViruScan, Sweep, AVTK, F-Prot, ChAV, NAV, NAVDX, VAlert, PCScan, NShld, Sweep/N, AVTK/N, NProt, NAV/N, Innoc, LProt Removal Instructions: Delete infected files General Comments: The CV4 virus was received in July, 1992. Its origin or point of isolation is unknown. CV4 is a non-resident, direct action infector of .COM files, including COMMAND.COM. When a program infected with the CV4 virus is executed, the CV4 virus infect one previously uninfected .COM file located in the current directory. If COMMAND.COM is located in this directory, it may become infected. Programs infected with the CV4 virus will have a file length increase of 321 bytes with the virus being located at the end of the infected file. The program's date and time in the DOS disk directory listing will not be altered. The following text strings can be found in the viral code in all CV4 infected programs: "This file infected with COMVIRUS 1.0" "*.COM" The first of these text strings is displayed on the system monitor each time an infected program is executed. CV4 doesn't do anything besides display its message and replicate.