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. 

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