Hiperion Virus

Virus Name: Hiperion Aliases: V Status: Rare Discovered: May, 1993 Symptoms: .COM file growth; file date/time changes Origin: Unknown Eff Length: 254 Bytes Type Code: PRaCK - Parasitic Resident .COM Infector Detection Method: ViruScan, F-Prot, Sweep, IBMAV, PCScan, NAV, AVTK, NAVDX, VAlert, ChAV, NShld, Sweep/N, NAV/N, NProt, AVTK/N, IBMAV/N, Innoc, LProt Removal Instructions: Delete infected files General Comments: The Hiperion virus was submitted in May, 1993. Its origin or point of isolation is unknown. Hiperion is a memory resident infector of .COM programs, including COMMAND.COM. When the first Hiperion infected program is executed, the Hiperion virus will become memory resident in a "hole" in allocated system memory, hooking interrupt 21. Total system and available free memory, as indicated by the DOS CHKDSK program, will not be altered. Once the Hiperion virus is memory resident, it will infect .COM programs, including COMMAND.COM, when they are executed. Infected programs will have a file length increase of 254 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 Hiperion infected programs. It is unknown what Hiperion may do besides replicate. Known variant(s) of Hiperion are: Hiperion.249: Received in July, 1994, Hiperion.249 is a 249 byte variant of the Hiperion virus described above. Infected programs will have a file length increase of 249 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: "C:\COMMAND.COM" Origin: Unknown July, 1994.