Maverick Virus

 Virus Name:  Maverick 
 Aliases:     Maverick.1536.A 
 V Status:    New 
 Discovered:  July, 1995 
 Symptoms:    .COM & .EXE growth; file date/time seconds = "30"; 
              decrease in available free memory; 
 Origin:      Unknown, but possibly USSR/Russia 
 Eff Length:  1,536 Bytes 
 Type Code:   PRhAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  F-Prot, AVTK, Sweep, IBMAV, ViruScan, ChAV, 
                    NAV 3.10 9612+, NAVBoot 2.0 9612+, 
                    Sweep/N, IBMAV/N, AVTK/N, NShld, Innoc, NAV/N 2.0 9612+ 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Maverick or Maverick.1536.A virus was received in July, 1995. 
       Its origin or point of isolation is unknown, though it appears it 
       may be from Russia or the USSR.  Maverick is a memory resident 
       stealth infector of .COM and .EXE files, including COMMAND.COM. 
       When the first Maverick 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. 
       Total available free memory, as indicated by the DOS CHKDSK program 
       from DOS 5.0, will have decreased by approximately 1,264 bytes. 
       Interrupt 21 will be hooked by the virus in memory. 
       Once the Maverick virus is memory resident, it will infect .COM and 
       .EXE files when they are executed or opened, but not on copy. 
       Infected programs will have a file length increase of 1,536 bytes, 
       though this file length increase will be hidden when the virus is 
       memory resident.  The virus will be 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 "30".  The following text string is encrypted within the 
       viral code: 
           "(c) ETERNAL MAVERICK. Kiev Computer Virus Club 1994." 
       It is unknown what the Maverick virus may do besides replicate. 
       Known variant(s) of Maverick are: 
       Maverick.1536.B: Also received in July, 1995, this is a minor 
           variant of the Maverick virus described above.  It is 
           functionally similar. 
           Origin:  Unknown  July, 1995. 

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