Gynx Virus

 Virus Name:  Gynx 
 Aliases:     Gynx.1000 
 V Status:    New 
 Discovered:  January, 1996 
 Symptoms:    .COM file growth; file date/time seconds = "08"; 
              decrease in available free memory 
 Origin:      Unknown 
 Eff Length:  1,000 Bytes 
 Type Code:   PRhCK - Parasitic Resident .COM Infector 
 Detection Method:  F-Prot, IBMAV, ViruScan, AVTK, NAV, NAVDX, ChAV, 
                    IBMAV/N, NShld, NAV/N, AVTK/N, Innoc 4.0+ 
 Removal Instructions:  F-Prot, or Delete infected files 
 General Comments: 
       The Gynx or Gynx.1000 virus was received in January, 1996.  Its 
       origin or point of isolation is unknown.  Gynx is a memory resident 
       infector of .COM files, including COMMAND.COM. 
       When the first Gynx infected program is executed, this virus will 
       install itself memory resident at the top of system memory but 
       below the 640K DOS boundary, not moving interrupt 12's return. 
       Available free memory, as indicated by the DOS CHKDSK program from 
       DOS 5.0, will have decreased by 1,264 bytes.  Interrupt 21 will be 
       hooked by the virus in memory.  Also at this time, the virus will 
       infect the copies of MODE.COM and KEYB.COM located in the C:\DOS 
       directory if they were not previously infected by the virus. 
       Once the Gynx virus is memory resident, it will infect .COM files, 
       including COMMAND.COM, when they are executed or opened.  Infected 
       .COM files will have a file length increase of 1,000 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 appear to be 
       altered, though the seconds field will have been set to "08".  The 
       following text strings are encrypted within the viral code: 
           "I walked in the jungle with my M-60,and what did I see.A big 
            fat nigger sitting in a tree.I was going to shoot him when he 
            started to pee!" 
       It is unknown what the Gynx virus may do besides replicate. 

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