Synergy Virus


 Virus Name:  Synergy 
 Aliases:    
 V Status:    New 
 Discovered:  October, 1994 
 Symptoms:    .COM file growth; file date/time changes 
 Origin:      Unknown 
 Eff Length:  288 Bytes 
 Type Code:   PRbCK - Parasitic Resident .COM Infector 
 Detection Method:  AVTK, Sweep, ViruScan, F-Prot, NAV, IBMAV, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    Sweep/N, NShld, AVTK/N, NAV/N, IBMAV/N, LProt, Innoc 4.0+ 
 Removal Instructions:  Delete infected files 
 
 General Comments: 
       The Synergy virus was received in October, 1994.  Its origin or point 
       of isolation is unknown.  Synergy is a memory resident infector of 
       .COM files, including COMMAND.COM. 
 
       When the first Synergy infected program is executed, this virus will 
       become memory resident in video card memory located at B000.  Total 
       system and available free memory, as indicated by the DOS CHKDSK 
       program, will not be changed.  Interrupts 10 and 21 will be hooked by 
       the virus in memory. 
 
       Once Synergy is memory resident, it will infect .COM programs when 
       they are executed.  Infected programs will have a file length increase 
       of 288 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 can be found within the viral 
       code in all infected files: 
 
               "SynergY"

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