Lamego Virus

Virus Name: Lamego Aliases: Lamego.722 V Status: New Discovered: December, 1996 Symptoms: .COM file growth; decrease in available free memory Origin: Unknown Eff Length: 722 Bytes Type Code: PRhCK - Parasitic Resident .COM Infector Detection Method: NAV, NAVDX, PCScan, AVTK, ViruScan, NAV/N, AVTK/N, NShld Removal Instructions: Delete infected files General Comments: The Lamego virus was received in December, 1996. Its origin or point of isolation is unknown. Lamego is a memory resident infector of .COM files, including COMMAND.COM. When the first Lamego infected program is executed, this virus will install itself memory resident at the top of system memory but below the 640K DOS boundary, not moving interrupt 12's return. Available free memory, as indicated by the DOS CHKDSK program from DOS 5.0, will have decreased by 1,600 bytes. Interrupt 21 will be hooked by the virus in memory. Once the Lamego virus is memory resident, it will infect .COM files, including COMMAND.COM, when they are executed. Infected programs will have a file length increase of 722 bytes with the virus being located at the end of the file. The program's date and time in the DOS disk directory listing will not be altered. The following text strings are visible within the viral code: "C:\COMMAND.COM .E" "*LAMEGO*PJ" It is unknown what this virus may do besides replicate.