Easy Virus

Virus Name: Easy Aliases: Easy.200 V Status: New Discovered: July, 1995 Symptoms: .COM file growth; file date/time changes; decrease in available free memory Origin: Unknown Eff Length: 200 Bytes Type Code: PRhCK - Parasitic Resident .COM Infector Detection Method: AVTK, VAlert, NAV, NAVDX, ViruScan, IBMAV, F-Prot, PCScan, ChAV, AVTK/N, NAV/N, IBMAV/N, NShld, Innoc 4.0+ Removal Instructions: Delete infected files General Comments: The Easy or Easy.200 virus was received in July, 1995. Its origin or point of isolation in unknown. Easy is a memory resident infector of .COM files, including COMMAND.COM. When the first Easy 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 208 bytes. Interrupt 21 will be hooked by the virus in memory. Once the Easy virus is memory resident, it will infect .COM files when they are executed. Infected files will have a file length increase of 200 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. The following text string is visible within the viral code: "Easy!"