V-160 Virus

 Virus Name:  V-160 
 V Status:    New 
 Discovered:  February, 1995 
 Symptoms:    .COM file growth; file date/time changes 
 Origin:      Unknown 
 Eff Length:  160 Bytes 
 Type Code:   PRaCK - Overwriting Resident .COM Infector 
 Detection Method:  F-Prot, ViruScan, AVTK, IBMAV, Sweep, NAV, 
                    NAVDX, VAlert, PCScan, ChAV, 
                    NShld, Innoc, NProt, IBMAV/N, AVTK/N, Sweep/N, NAV/N 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The V-160 virus was received in February, 1995.  Its origin or point 
       of isolation is unknown.  V-160 is a memory resident infector of 
       .COM files, including COMMAND.COM. 
       When the first V-160 infected file is executed, this virus will 
       install itself in allocated system memory, directly hooking 
       interrupts.  As a result, no interrupts will be mapped to the virus 
       in memory. 
       Once the V-160 virus is memory resident, it will infect .COM files 
       when they are executed.  Infected .COM files will have a file length 
       increase of 160 bytes with the virus being located at the beginning 
       of the file.  The file's date and time in the DOS disk directory 
       listing will not be altered.  No text strings are visible within 
       the viral code. 
       V-160 doesn't appear to do anything besides replicate. 

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