Tamanna Virus

 Virus Name:  Tamanna 
 V Status:    New 
 Discovered:  February, 1994. 
 Symptoms:    .COM & .EXE growth; Read Only Attribute set on files; 
              decrease in total system & available free memory 
 Origin:      Unknown 
 Eff Length:  1,857 - 1,872 Bytes 
 Type Code:   PRhAK - Parasitic Resident .COM & .EXE Infector 
 Detection Method:  F-Prot, AVTK, ViruScan, IBMAV, Sweep, NAVDX, NAV, 
                    VAlert, PCScan, 
                    NShld, AVTK/N, NProt, Sweep/N, IBMAV/N, NAV/N, LProt 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Tamanna virus was received in February, 1994.  Its origin or point 
       of isolation is unknown.  Tamanna is a memory resident infector of 
       .COM and .EXE programs, including COMMAND.COM. 
       When the first Tamanna infected program is executed, the Tamanna 
       virus will install itself memory resident at the top of system 
       memory but below the 640K DOS boundary, hooking interrupts 1C and 21. 
       Interrupt 12's return will not be moved.  Total system and 
       available free memory, as indicated by the DOS CHKDSK program, 
       will have decreased by 1,888 bytes. 
       Once the Tamanna virus is memory resident, it will infect .COM and 
       .EXE programs when they are executed.  Infected programs will have a 
       file length increase of 1,857 to 1,872 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 be altered, but the read only 
       attribute will be set.  The following text strings are encrypted 
       within the Tamanna viral code in all infected programs: 
               "Facts need no recognition" 
               "A silent friend" 
               "Press T to reconcile with my Wish" 
               "OK carry on >>" 
               "File has been modified" 
               "Standby while rebooting" 
       It is unknown what Tamanna may do besides replicate. 

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