Micropox Virus

 Virus Name:  Micropox 
 Aliases:     K 
 V Status:    Rare 
 Discovered:  February, 1992 
 Symptoms:    .COM & .EXE growth; decrease in total system & available free 
              memory; corrupts system hard disk 
 Origin:      United States 
 Eff Length:  4,928 Bytes 
 Type Code:   PRhA - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, Sweep, F-Prot, AVTK, PCScan, ChAV, 
                    NAV, IBMAV, NAVDX, VAlert, 
                    NShld, LProt, Sweep/N, Innoc, NProt, AVTK/N, 
                    NAV/N, IBMAV/N 
 Removal Instructions:  Delete infected programs 
 General Comments: 
       The Micropox virus was submitted in February, 1992.  It was 
       isolated in the United States.  Micropox is a memory resident 
       infector of .COM and .EXE programs, it does not infect COMMAND.COM. 
       It is destructive when it activates. 
       The first time a program infected with the Micropox virus is 
       executed, the Micropox 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 system and available free 
       memory, as indicated by the DOS CHKDSK program, will have decreased 
       by 4,944 bytes.  Interrupts 1C and 21 will be hooked by the virus. 
       One .COM and one .EXE program located in the current directory may 
       be infected by the virus at this time. 
       Once the Micropox virus is memory resident, it will infect .COM and 
       .EXE programs when they are executed.  Infected programs will have 
       a file length increase of 4,928 bytes.  The virus will be located 
       at the end of the program.  The file's date and time in the DOS 
       disk directory listing will not be altered.  No text strings are 
       visible in the viral code in infected programs. 
       The Micropox virus activates when it becomes memory resident in the 
       month of March.  During the month of March, execution of the first 
       infected program when the virus is not already memory resident will 
       result in the virus overwriting the system hard disk.     

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