Antigus Virus

Virus Name: Antigus Aliases: Antigus.1570 V Status: New Discovery: January, 1996 Symptoms: .EXE file growth; file date/time changes; decrease in available free memory Origin: Malaysia Eff Length: 1,570 - 1,584 Bytes Type Code: PRhE - Parasitic Resident .EXE Infector Detection Method: ViruScan, IBMAV, AVTK, NAV, NAVDX, F-Prot, ChAV, IBMAV/N, NShld, NAV/N, AVTK/N, Innoc Removal Instructions: Delete infected files General Comments: The Antigus virus was received in January, 1996. It appears to be from Malaysia. Antigus is a memory resident infector of .EXE files. When the first Antigus 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 3,184 bytes. Interrupts 08 and 21 will be hooked by the virus in memory. Once the Antigus virus is memory resident, it will infect .EXE files when they are executed. Infected files will have a file length increase of 1,570 to 1,584 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 strings are encrypted within the viral code: "Happy birthday to me!" "E-VIRUS II aka Anti-GUS.12th December 1994.KL,Malaysia" "TM was here!" It is unknown what the Antigus virus does besides replicate.