2153 Virus

 Virus Name:  2153 
 V Status:    Rare 
 Discovery:   July, 1992 
 Symptoms:    .COM & .EXE file growth; TSR 
 Origin:      Unknown 
 Eff Length:  2,153 - 2,217 Bytes 
 Type Code:   PRsA - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  ViruScan, Sweep, AVTK, F-Prot, IBMAV, NAV, 
                    NAVDX, VAlert, ChAV, 
                    NShld, Sweep/N, AVTK/N, IBMAV/N, Innoc, NAV/N 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The 2153 virus was submitted in July, 1992.  Its origin or point of 
       isolation is unknown.  This virus is a memory resident infector of 
       .COM and .EXE programs.  It does not infect COMMAND.COM. 
       The first time a program infected with the 2153 virus is executed, 
       the 2153 virus will install itself memory resident as a low system 
       memory TSR of 2,672 bytes.  Interrupt 22 will be hooked by the 
       virus in memory. 
       Once the 2153 virus is memory resident, it will infect .COM and 
       .EXE programs when they are executed.  Infected .COM programs will 
       have a file length increase of 2,153 to 2,168 bytes.  Infected 
       .EXE programs will have a file length increase of 2,203 to 2,217 
       bytes.  In both cases the virus will be located at the end of the 
       file.  The infected program's date and time in the DOS disk 
       directory listing will not be altered. 
       It is unknown what 2153 does besides replicate. 

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