AVV-2300 Virus

 Virus Name:  AVV-2300 
 Aliases:     AVV 1.12 
 V Status:    Rare 
 Discovery:   November, 1993 
 Symptoms:    .COM file growth; messages 
 Origin:      Unknown 
 Eff Length:  2,300 Bytes 
 Type Code:   PNCK - Parasitic Non-Resident .COM Infector 
 Detection Method:  F-Prot, ViruScan, IBMAV, AVTK, Sweep, ChAV, 
                    NAV, NAVDX, VAlert, PCScan, 
                    NShld, Sweep/N, AVTK/N, NProt, IBMAV/N, Innoc, NAV/N, 
 Removal Instructions: Delete infected files 
 General Comments: 
       The AVV-2300 or AVV 1.12 virus was received in November, 1993.  Its 
       origin or point of isolation is unknown.  AVV-2300 is a non-resident 
       infector of .COM programs, including COMMAND.COM.  It does not 
       infect very small .COM programs. 
       When a program infected with the AVV-2300 virus is executed, this 
       virus will infect one .COM program located in the current directory. 
       Infected programs will have a file length increase of 2,300 bytes with 
       the virus being located at the beginning of the file.  The file's date 
       and time in the DOS disk directory listing will not be altered.  The 
       following text strings are visible within the viral code in all 
       AVV-2300 infected programs: 
               "The AVV version 1.12, Copyright (C) 1992" 
               "*.com AVV Warning!" 
               "In file filename.ext may be virus." 
               "AVV Warning!" 
               "In system area may be virus." 
               "AVV Warning!" 
               "In system may be virus." 
               "The AntiVirus Virus version 1.12: 
                I am checking 200++ viruses" 
               "Thank's Yankee Doodle for original vectors" 
       As implied by the above messages, this virus is capable of detecting 
       the presence of many older viruses in system memory, as well as 
       system and program files.  It also contains code to remove itself 
       from infected programs if the AVV environmental variable is set to 

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