Manta Virus

 Virus Name:  Manta 
 V Status:    Rare 
 Discovered:  July, 1991 
 Symptoms:    .COM file growth; AUTOEXEC.BAT & CONFIG.SYS replaced; 
              programs fail to execute properly 
 Origin:      Unknown 
 Eff Length:  1,077 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  ViruScan, F-Prot, Sweep, AVTK, ChAV, 
                    NAV, IBMAV, NAVDX, VAlert, PCScan, 
                    NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N, 
                    NAV/N, IBMAV/N 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Manta virus was received in July, 1991.  Its origin is unknown. 
       Manta is a non-resident direct action infector of .COM files, 
       including COMMAND.COM.  Manta is based on the VCS virus. 
       When a program infected with Manta is executed, up to four .COM 
       files in the current directory may be infected by the Manta virus. 
       Additionally, the following message may be displayed, and the 
       AUTOEXEC.BAT and CONFIG.SYS files on drive C: may be replaced: 
               "RAM Parity Error @ 0F67:1B2C 
                (C)ontinue  (S)hut off NMI  (R)eboot 
       If C is entered for "Continue", the program will then most likely 
       function properly. 
       A blank entry may also be created in the current directory for a 
       512 byte file, though this does not always occur. 
       Programs infected with the Manta virus will increase in size by 
       1,077 bytes, the virus will be located at the end of the infected 
       The 512 byte file which replaced AUTOEXEC.BAT and CONFIG.SYS on 
       drive C: willl contain the above message, and several lines of 
       text in German. 
       See:   VCS 

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