%%File: VIRS0751.TXT
%%Name/Aliases: The Basic Virus, 5120, V Basic Virus
%%Platform: PC/MS-DOS
%%Type: Program., 
%%Disk Location: COM application., EXE application.
%%Features: Direct acting.
%%Damage: 
%%Size: 5120-5135 bytes change in length. Code added at a paragraph 
boundary.
%%See Also: 
%%Notes: The virus infects programs at run time (it is not memory 
resident) by searching through the directories recursively starting on 
paths "C:\", "F:\" as well as the current drive. All .EXE and .COM files 
it can find are infected. EXE files will be infected if the length as 
reported by DOS is less that the file length as reported by the EXE 
header plus one page. COM files will be infected if the file length is 
less than 60400 bytes.
The virus will infect any time it is executed after the 6th of July 
1989. However, an  infected file will infect before this date, if it has 
already been executed once.
On any date after the 1st of June, 1992, any infected file will 
terminate with the message "Access denied" (this comes from the  virus, 
not from DOS).  After 1/1/92, executed programs terminate with an 
"Access denied" error.   The following texts are contained in the virus: 
"BASRUN", "BRUN", "IBMBIO.COM", "IBMDOS.COM", "COMMAND.COM", "Access 
denied"