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This tool can be useful for solving some reversing challenges in CTFs events.

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Pintool

This tool can be useful for solving some reversing challenges in CTFs events. Implements the technique described here:

Configuration

You must configure your pin PATH inside of script

PIN = "./pin-2.13-62732-gcc.4.4.7-linux/pin"
INSCOUNT32 = "./pin-2.13-62732-gcc.4.4.7-linux/inscount0.so"
INSCOUNT64 = "./pin-2.13-62732-gcc.4.4.7-linux/source/tools/ManualExamples/obj-intel64/inscount0.so"

Help

$python pintool.py 
usage: pintool.py [-h] [-e] [-l LEN] [-c NUMBER] [-b CHARACTER] [-a ARCH]
                   [-i INITPASS] [-s SIMBOL] [-d EXPRESSION]
                   Filename

positional arguments:
  Filename       Program for playing with Pin Tool

optional arguments:
  -h, --help     show this help message and exit
  -e             Study the password length, for example -e -l 40, with 40
                 characters
  -l LEN         Length of password (Default: 10 )
  -c NUMBER      Charset definition for brute force (1-Lowercase, 2-Uppecase,
                 3-Numbers, 4-Hexadecimal, 5-Punctuation, 6-All)
  -b CHARACTER   Add characters for the charset, example -b _-
  -a ARCH        Program architecture 32 or 64 bits, -a 32 or -a 64
  -i INITPASS    Inicial password characters, example -i CTF{
  -s SIMBOL      Simbol for complete all password (Default: _ )
  -d EXPRESSION  Difference between instructions that are successful or not
                 (Default: != 0, example -d '== -12', -d '=> 900', -d '<= 17'
                 or -d '!= 32')

Examples

Baleful - picoCTF 2014

$python pintool.py -l 30 -c 1,2,3 -b _{} -s - baleful
p----------------------------- = 763799 difference -12 instructions
pa---------------------------- = 763787 difference -12 instructions
pac--------------------------- = 763775 difference -12 instructions
pack-------------------------- = 763763 difference -12 instructions
packe------------------------- = 763751 difference -12 instructions
packer------------------------ = 763739 difference -12 instructions
packers----------------------- = 763727 difference -12 instructions
packers_---------------------- = 763715 difference -12 instructions
packers_a--------------------- = 763703 difference -12 instructions
packers_an-------------------- = 763691 difference -12 instructions
packers_and------------------- = 763679 difference -12 instructions
packers_and_------------------ = 763667 difference -12 instructions
packers_and_v----------------- = 763655 difference -12 instructions
packers_and_vm---------------- = 763643 difference -12 instructions
packers_and_vms--------------- = 763631 difference -12 instructions
packers_and_vms_-------------- = 763619 difference -12 instructions
packers_and_vms_a------------- = 763607 difference -12 instructions
packers_and_vms_an------------ = 763595 difference -12 instructions
packers_and_vms_and----------- = 763583 difference -12 instructions
packers_and_vms_and_---------- = 763571 difference -12 instructions
packers_and_vms_and_x--------- = 763559 difference -12 instructions
packers_and_vms_and_xo-------- = 763547 difference -12 instructions
packers_and_vms_and_xor------- = 763535 difference -12 instructions
packers_and_vms_and_xors------ = 763523 difference -12 instructions
packers_and_vms_and_xors_----- = 763511 difference -12 instructions
packers_and_vms_and_xors_o---- = 763499 difference -12 instructions
packers_and_vms_and_xors_oh--- = 763487 difference -12 instructions
packers_and_vms_and_xors_oh_-- = 763475 difference -12 instructions
packers_and_vms_and_xors_oh_m- = 763463 difference -12 instructions
packers_and_vms_and_xors_oh_my = 763463 difference -12 instructions
packers_and_vms_and_xors_oh_my

Reverse 400 - Hack You 2014

$python pintool.py -l 37 -c 4 -i CTF{ -b }_ -s - -d '=> 651' reverse400
CTF{c________________________________ = 1057174 difference 1300 instructions
CTF{c9_______________________________ = 1058474 difference 1300 instructions
CTF{c9f______________________________ = 1059774 difference 1300 instructions
CTF{c9fd_____________________________ = 1061074 difference 1300 instructions
CTF{c9fd9____________________________ = 1062374 difference 1300 instructions
CTF{c9fd99___________________________ = 1063674 difference 1300 instructions
CTF{c9fd99d__________________________ = 1064974 difference 1300 instructions
CTF{c9fd99de_________________________ = 1066274 difference 1300 instructions
CTF{c9fd99de8________________________ = 1067574 difference 1300 instructions
CTF{c9fd99de8e_______________________ = 1068874 difference 1300 instructions
CTF{c9fd99de8eb______________________ = 1070174 difference 1300 instructions
CTF{c9fd99de8eb0_____________________ = 1071474 difference 1300 instructions
CTF{c9fd99de8eb08____________________ = 1072774 difference 1300 instructions
CTF{c9fd99de8eb082___________________ = 1074074 difference 1300 instructions
CTF{c9fd99de8eb082c__________________ = 1075374 difference 1300 instructions
CTF{c9fd99de8eb082c6_________________ = 1076674 difference 1300 instructions
CTF{c9fd99de8eb082c66________________ = 1077974 difference 1300 instructions
CTF{c9fd99de8eb082c66c_______________ = 1079274 difference 1300 instructions
CTF{c9fd99de8eb082c66c4______________ = 1080574 difference 1300 instructions
CTF{c9fd99de8eb082c66c4c_____________ = 1081874 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce____________ = 1083174 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce4___________ = 1084474 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce40__________ = 1085774 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce403_________ = 1087074 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce4039________ = 1088374 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce4039f19c____ = 1093574 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce4039f19c4___ = 1094874 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce4039f19c4f__ = 1096174 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce4039f19c4fc_ = 1097474 difference 1300 instructions
CTF{c9fd99de8eb082c66c4ce4039f19c4fc} = 1098391 difference 917 instructions
CTF{c9fd99de8eb082c66c4ce4039f19c4fc}

wyvern 500 - CSAW CTF 2015

$python pintool.py -c 1,2,3 -b _ -s - -a 64 -l 28 wyvern
d--------------------------- = 1505212 difference 10332 instructions
dr-------------------------- = 1515830 difference 10618 instructions
dr4------------------------- = 1521965 difference 6135 instructions
dr4g------------------------ = 1533160 difference 11195 instructions
dr4g0----------------------- = 1539867 difference 6707 instructions
dr4g0n---------------------- = 1546952 difference 7085 instructions
dr4g0n_--------------------- = 1554227 difference 7275 instructions
dr4g0n_o-------------------- = 1566566 difference 12339 instructions
dr4g0n_or------------------- = 1574413 difference 7847 instructions
dr4g0n_or_------------------ = 1582638 difference 8225 instructions
dr4g0n_or_p----------------- = 1591053 difference 8415 instructions
dr4g0n_or_p4---------------- = 1599752 difference 8699 instructions
dr4g0n_or_p4t--------------- = 1608735 difference 8983 instructions
dr4g0n_or_p4tr-------------- = 1618098 difference 9363 instructions
dr4g0n_or_p4tri------------- = 1627651 difference 9553 instructions
dr4g0n_or_p4tric------------ = 1642776 difference 15125 instructions
dr4g0n_or_p4tric1----------- = 1652899 difference 10123 instructions
dr4g0n_or_p4tric1a---------- = 1663001 difference 10102 instructions
dr4g0n_or_p4tric1an--------- = 1673709 difference 10708 instructions
dr4g0n_or_p4tric1an_-------- = 1684701 difference 10992 instructions
dr4g0n_or_p4tric1an_i------- = 1695977 difference 11276 instructions
dr4g0n_or_p4tric1an_it------ = 1707626 difference 11649 instructions
dr4g0n_or_p4tric1an_it5----- = 1719474 difference 11848 instructions
dr4g0n_or_p4tric1an_it5_---- = 1731606 difference 12132 instructions
dr4g0n_or_p4tric1an_it5_L--- = 1744022 difference 12416 instructions
dr4g0n_or_p4tric1an_it5_LL-- = 1756811 difference 12789 instructions
dr4g0n_or_p4tric1an_it5_LLV- = 1769799 difference 12988 instructions
dr4g0n_or_p4tric1an_it5_LLVM = 1785242 difference 15443 instructions
dr4g0n_or_p4tric1an_it5_LLVM

License

MIT

Contact

For bugs please email me.

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This tool can be useful for solving some reversing challenges in CTFs events.

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