Solar Virus

Virus Name: Solar Aliases: Solar.122 V Status: New Discovered: January, 1996 Symptoms: .EXE file growth; beeping Origin: Unknown Eff Length: 122 Bytes Type Code: PRaE - Parasitic Resident .EXE Infector Detection Method: IBMAV, AVTK, F-Prot, ViruScan, NAV, NAVDX, PCScan, IBMAV/N, AVTK/N, NAV/N, NShld 2.33+ Removal Instructions: Delete infected files General Comments: The Solar or Solar.122 virus was received in January, 1996. Its origin or point of isolation is unknown. Solar is a memory resident infector of .EXE files. When the first Solar infected program is executed, this virus will install itself memory resident in allocated system memory, hooking interrupt 21. Total system and available free memory, as indicated by the DOS CHKDSK program from DOS 5.0, will not be altered. When memory resident, the Solar virus will infect the target file when .EXE files are copied to a subdirectory. Infected programs will have a file length increase of 122 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. No text strings are visible within the viral code. Beeping may be emitted from the system speaker when the virus becomes memory resident.