Star Virus

 Virus Name:  Star 
 Aliases:     Star.486 
 V Status:    New 
 Discovered:  July, 1995 
 Symptoms:    .COM file growth; file date/time changes 
 Origin:      Unknown 
 Eff Length:  486 Bytes 
 Type Code:   PRaC - Parasitic Resident .COM Infector 
 Detection Method: F-Prot, AVTK, VAlert, Sweep, IBMAV, ViruScan, 
                   NAV, NAVDX, PCScan, ChAV, 
                   Sweep/N, IBMAV/N, NShld, AVTK/N, NAV/N, Innoc 4.0+ 
 Removal Instructions:  Delete infected files 
 General Comments: 
       The Star or Star.486 virus was received in July, 1995.  Its origin 
       or point of isolation is unknown.  Star is a memory resident 
       infector of .COM files, but not COMMAND.COM.  It is unknown what 
       it may do besides replicate. 
       When the first Star infected program is executed, this virus will 
       install itself memory resident in allocated system memory.  The 
       amount of memory indicated for total system memory and available 
       free memory by the DOS CHKDSK program will not be altered. 
       Interrupt 21 will be hooked by the virus in memory. 
       Once the Star virus is memory resident, it will infect .COM 
       programs, but not COMMAND.COM, when they are executed.  Infected 
       .COM files will have a file length increase of 486 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 have been updated to the 
       current system date and time when infection occurred.  The following 
       text string can be found at the end of all infected files: 

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