Milano Virus

Virus Name: Milano Aliases: V Status: Rare Discovered: August, 1993 Symptoms: .EXE file growth; file date/time changes; decrease in total system & available free memory Origin: Italy Eff Length: 2,078 Bytes Type Code: PRhE - Parasitic Resident .EXE Infector Detection Method: ViruScan, Sweep, F-Prot, AVTK, IBMAV, NAV, NAVDX, VAlert, PCScan, NShld, Sweep/N, AVTK/N, IBMAV/N, NAV/N, LProt Removal Instructions: Delete infected files General Comments: The Milano virus was received in August, 1993, and is originally from Italy. Milano is a memory resident infector of .EXE programs, though it does not infect very small .EXE files. When the first Milano 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. Total system and available free memory, as indicated by the DOS CHKDSK program, will have decreased by 4,160 bytes. Interrupts 21 and 28 will be hooked by the virus in memory. Once the Milano virus is memory resident, it will infect .EXE programs when they are executed. Infected programs will have a file length increase of 2,078 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 have been updated to the current system date and time when infection occurred. No text strings are visible within the viral code in infected programs. It is unknown what Milano does besides replicate.