__BreakIn 2016 :: Bots are Awesome!__==================================
_John Hammond_ | _Sunday, January 24, 2016_ 
> Aren't bots awesome!.
----------
This challenge was not very clear -- at all -- at what it was meant to be; you had to be in the [IRC] channel to even realize there was a 'bot', and it was an "[IRC] bot" that you were only able to interact with by _being on the IRC channel_.
Regardless, we spotted this and started to interact with it. Apparently, the only things we could really do to get it to say anything or even do anything in response was with the preceding input of `!teeheeBreakIn`. With `!teeheeBreakIn help`, we got a _little_ more information...
```>> !teeheeBreakIn helpTEEHEEBOT : written in Golang.Current Functions: help, aboutUSAGE: '!teehee <function> [flags]```
Although, the usage is instead with `!teeheeBreakIn` rather than simply `!teehee` to start. With that we tried to run `!teeheeBreakIn about`. That got us this response,
```>> !teeheeBreakIn aboutThis is where all the magic happens. ;)```
What the heck does that mean? 
Regardless, we kept trying to poke at thing, but to no avail. We tried different commands we just got _hoped_ would do something, but always got the response:
```I didn't get that, try '!teehee help' ?? ```
After staring at that error response for a while (for way too long), we thought... _why don't we [Google] that response?_
With any [CTF], it's worth trying _everything_, so maybe we could find some source code online for the service. Worth a shot, at least.
And bam, first [Google] result [we get some source code hosted on github](https://github.com/amoghbl1/goIrcBot/blob/master/ircbot.go)
We read through this for a long long while, but it pretty much just validated all the functionality we had already figured out. So, since it was a [github] project, we figured we'd look around at the actual repository. There were no worthwhile or helpful "issues" to read in the "Issues" section, nothing valuable in the "commits"...
__But then we looked at the [github][github] [branches][branches].__
We saw a ["breakin" branch](https://github.com/amoghbl1/goIrcBot/blob/breakin/ircbot.go) and we knew we had hit jackpot. [It looked like that would have more specific functionality for the real bot running for the competition.](ircbot.go)
After reading through some of the source code, we found that we could also enter the command `!teeheeBreakIn breakInEnter`. In the source code we discovered, that was apparently not supposed to actually do anything... _but_, we still operate under the mentality of _try everything_.
```!teeheeBreakIn breakInEntersugarHowYouGetSoFlyyy```
Ha! _That_ doesn't look like normal functionality. ;) We entered that as our flag, and it was accepted!
__The flag is `sugarHowYouGetSoFlyyy`.__
[netcat]: https://en.wikipedia.org/wiki/Netcat[Wikipedia]: https://www.wikipedia.org/[Linux]: https://www.linux.com/[man page]: https://en.wikipedia.org/wiki/Man_page[PuTTY]: http://www.putty.org/[ssh]: https://en.wikipedia.org/wiki/Secure_Shell[Windows]: http://www.microsoft.com/en-us/windows[virtual machine]: https://en.wikipedia.org/wiki/Virtual_machine[operating system]:https://en.wikipedia.org/wiki/Operating_system[OS]: https://en.wikipedia.org/wiki/Operating_system[VMWare]: http://www.vmware.com/[VirtualBox]: https://www.virtualbox.org/[hostname]: https://en.wikipedia.org/wiki/Hostname[port number]: https://en.wikipedia.org/wiki/Port_%28computer_networking%29[distribution]:https://en.wikipedia.org/wiki/Linux_distribution[Ubuntu]: http://www.ubuntu.com/[ISO]: https://en.wikipedia.org/wiki/ISO_image[standard streams]: https://en.wikipedia.org/wiki/Standard_streams[standard output]: https://en.wikipedia.org/wiki/Standard_streams[standard input]: https://en.wikipedia.org/wiki/Standard_streams[read]: http://ss64.com/bash/read.html[variable]: https://en.wikipedia.org/wiki/Variable_%28computer_science%29[command substitution]: http://www.tldp.org/LDP/abs/html/commandsub.html[permissions]: https://en.wikipedia.org/wiki/File_system_permissions[redirection]: http://www.tldp.org/LDP/abs/html/io-redirection.html[pipe]: http://www.tldp.org/LDP/abs/html/io-redirection.html[piping]: http://www.tldp.org/LDP/abs/html/io-redirection.html[tmp]: http://www.tldp.org/LDP/Linux-Filesystem-Hierarchy/html/tmp.html[curl]: http://curl.haxx.se/[cl1p.net]: https://cl1p.net/[request]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html[POST request]: https://en.wikipedia.org/wiki/POST_%28HTTP%29[Python]: http://python.org/[interpreter]: https://en.wikipedia.org/wiki/List_of_command-line_interpreters[requests]: http://docs.python-requests.org/en/latest/[urllib]: https://docs.python.org/2/library/urllib.html[file handling with Python]: https://docs.python.org/2/tutorial/inputoutput.html#reading-and-writing-files[bash]: https://www.gnu.org/software/bash/[Assembly]: https://en.wikipedia.org/wiki/Assembly_language[the stack]:  https://en.wikipedia.org/wiki/Stack_%28abstract_data_type%29[register]: http://www.tutorialspoint.com/assembly_programming/assembly_registers.htm[hex]: https://en.wikipedia.org/wiki/Hexadecimal[hexadecimal]: https://en.wikipedia.org/wiki/Hexadecimal[archive file]: https://en.wikipedia.org/wiki/Archive_file[zip file]: https://en.wikipedia.org/wiki/Zip_%28file_format%29[zip files]: https://en.wikipedia.org/wiki/Zip_%28file_format%29[.zip]: https://en.wikipedia.org/wiki/Zip_%28file_format%29[gigabytes]: https://en.wikipedia.org/wiki/Gigabyte[GB]: https://en.wikipedia.org/wiki/Gigabyte[GUI]: https://en.wikipedia.org/wiki/Graphical_user_interface[Wireshark]: https://www.wireshark.org/[FTP]: https://en.wikipedia.org/wiki/File_Transfer_Protocol[client and server]: https://simple.wikipedia.org/wiki/Client-server[RETR]: http://cr.yp.to/ftp/retr.html[FTP server]: https://help.ubuntu.com/lts/serverguide/ftp-server.html[SFTP]: https://en.wikipedia.org/wiki/SSH_File_Transfer_Protocol[SSL]: https://en.wikipedia.org/wiki/Transport_Layer_Security[encryption]: https://en.wikipedia.org/wiki/Encryption[HTML]: https://en.wikipedia.org/wiki/HTML[Flask]: http://flask.pocoo.org/[SQL]: https://en.wikipedia.org/wiki/SQL[and]: https://en.wikipedia.org/wiki/Logical_conjunction[Cyberstakes]: https://cyberstakesonline.com/[cat]: https://en.wikipedia.org/wiki/Cat_%28Unix%29[symbolic link]: https://en.wikipedia.org/wiki/Symbolic_link[ln]: https://en.wikipedia.org/wiki/Ln_%28Unix%29[absolute path]: https://en.wikipedia.org/wiki/Path_%28computing%29[CTF]: https://en.wikipedia.org/wiki/Capture_the_flag#Computer_security[Cyberstakes]: https://cyberstakesonline.com/[OverTheWire]: http://overthewire.org/[Leviathan]: http://overthewire.org/wargames/leviathan/[ls]: https://en.wikipedia.org/wiki/Ls[grep]: https://en.wikipedia.org/wiki/Grep[strings]: http://linux.die.net/man/1/strings[ltrace]: http://linux.die.net/man/1/ltrace[C]: https://en.wikipedia.org/wiki/C_%28programming_language%29[strcmp]: http://linux.die.net/man/3/strcmp[access]: http://pubs.opengroup.org/onlinepubs/009695399/functions/access.html[system]: http://linux.die.net/man/3/system[real user ID]: https://en.wikipedia.org/wiki/User_identifier[effective user ID]: https://en.wikipedia.org/wiki/User_identifier[brute force]: https://en.wikipedia.org/wiki/Brute-force_attack[for loop]: https://en.wikipedia.org/wiki/For_loop[bash programming]: http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html[Behemoth]: http://overthewire.org/wargames/behemoth/[command line]: https://en.wikipedia.org/wiki/Command-line_interface[command-line]: https://en.wikipedia.org/wiki/Command-line_interface[cli]: https://en.wikipedia.org/wiki/Command-line_interface[PHP]: https://php.net/[URL]: https://en.wikipedia.org/wiki/Uniform_Resource_Locator[TamperData]: https://addons.mozilla.org/en-US/firefox/addon/tamper-data/[Firefox]: https://www.mozilla.org/en-US/firefox/new/?product=firefox-3.6.8&os=osx%E2%8C%A9=en-US[Caesar Cipher]: https://en.wikipedia.org/wiki/Caesar_cipher[Google Reverse Image Search]: https://www.google.com/imghp[PicoCTF]: https://picoctf.com/[PicoCTF 2014]: https://picoctf.com/[JavaScript]: https://www.javascript.com/[base64]: https://en.wikipedia.org/wiki/Base64[client-side]: https://en.wikipedia.org/wiki/Client-side_scripting[client side]: https://en.wikipedia.org/wiki/Client-side_scripting[javascript:alert]: http://www.w3schools.com/js/js_popup.asp[Java]: https://www.java.com/en/[2147483647]: https://en.wikipedia.org/wiki/2147483647_%28number%29[XOR]: https://en.wikipedia.org/wiki/Exclusive_or[XOR cipher]: https://en.wikipedia.org/wiki/XOR_cipher[quipqiup.com]: http://www.quipqiup.com/[PDF]: https://en.wikipedia.org/wiki/Portable_Document_Format[pdfimages]: http://linux.die.net/man/1/pdfimages[ampersand]: https://en.wikipedia.org/wiki/Ampersand[URL encoding]: https://en.wikipedia.org/wiki/Percent-encoding[Percent encoding]: https://en.wikipedia.org/wiki/Percent-encoding[URL-encoding]: https://en.wikipedia.org/wiki/Percent-encoding[Percent-encoding]: https://en.wikipedia.org/wiki/Percent-encoding[endianness]: https://en.wikipedia.org/wiki/Endianness[ASCII]: https://en.wikipedia.org/wiki/ASCII[struct]: https://docs.python.org/2/library/struct.html[pcap]: https://en.wikipedia.org/wiki/Pcap[packet capture]: https://en.wikipedia.org/wiki/Packet_analyzer[HTTP]: https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol[Wireshark filters]: https://wiki.wireshark.org/DisplayFilters[SSL]: https://en.wikipedia.org/wiki/Transport_Layer_Security[Assembly]: https://en.wikipedia.org/wiki/Assembly_language[Assembly Syntax]: https://en.wikipedia.org/wiki/X86_assembly_language#Syntax[Intel Syntax]: https://en.wikipedia.org/wiki/X86_assembly_language[Intel or AT&T]: http://www.imada.sdu.dk/Courses/DM18/Litteratur/IntelnATT.htm[AT&T syntax]: https://en.wikibooks.org/wiki/X86_Assembly/GAS_Syntax[GET request]: https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods[GET requests]: https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods[IP Address]: https://en.wikipedia.org/wiki/IP_address[IP Addresses]: https://en.wikipedia.org/wiki/IP_address[MAC Address]: https://en.wikipedia.org/wiki/MAC_address[session]: https://en.wikipedia.org/wiki/Session_%28computer_science%29[Cookie Manager+]: https://addons.mozilla.org/en-US/firefox/addon/cookies-manager-plus/[hexedit]: http://linux.die.net/man/1/hexedit[Google]: http://google.com/[Scapy]: http://www.secdev.org/projects/scapy/[ARP]: https://en.wikipedia.org/wiki/Address_Resolution_Protocol[UDP]: https://en.wikipedia.org/wiki/User_Datagram_Protocol[SQL injection]: https://en.wikipedia.org/wiki/SQL_injection[sqlmap]: http://sqlmap.org/[sqlite]: https://www.sqlite.org/[MD5]: https://en.wikipedia.org/wiki/MD5[OpenSSL]: https://www.openssl.org/[Burpsuite]:https://portswigger.net/burp/[Burpsuite.jar]:https://portswigger.net/burp/[Burp]:https://portswigger.net/burp/[NULL character]: https://en.wikipedia.org/wiki/Null_character[Format String Vulnerability]: http://www.cis.syr.edu/~wedu/Teaching/cis643/LectureNotes_New/Format_String.pdf[printf]: http://pubs.opengroup.org/onlinepubs/009695399/functions/fprintf.html[argument]: https://en.wikipedia.org/wiki/Parameter_%28computer_programming%29[arguments]: https://en.wikipedia.org/wiki/Parameter_%28computer_programming%29[parameter]: https://en.wikipedia.org/wiki/Parameter_%28computer_programming%29[parameters]: https://en.wikipedia.org/wiki/Parameter_%28computer_programming%29[Vortex]: http://overthewire.org/wargames/vortex/[socket]: https://docs.python.org/2/library/socket.html[file descriptor]: https://en.wikipedia.org/wiki/File_descriptor[file descriptors]: https://en.wikipedia.org/wiki/File_descriptor[Forth]: https://en.wikipedia.org/wiki/Forth_%28programming_language%29[github]: https://github.com/[buffer overflow]: https://en.wikipedia.org/wiki/Buffer_overflow[try harder]: https://www.offensive-security.com/when-things-get-tough/[segmentation fault]: https://en.wikipedia.org/wiki/Segmentation_fault[seg fault]: https://en.wikipedia.org/wiki/Segmentation_fault[segfault]: https://en.wikipedia.org/wiki/Segmentation_fault[shellcode]: https://en.wikipedia.org/wiki/Shellcode[sploit-tools]: https://github.com/SaltwaterC/sploit-tools[Kali]: https://www.kali.org/[Kali Linux]: https://www.kali.org/[gdb]: https://www.gnu.org/software/gdb/[gdb tutorial]: http://www.unknownroad.com/rtfm/gdbtut/gdbtoc.html[payload]: https://en.wikipedia.org/wiki/Payload_%28computing%29[peda]: https://github.com/longld/peda[git]: https://git-scm.com/[home directory]: https://en.wikipedia.org/wiki/Home_directory[NOP slide]:https://en.wikipedia.org/wiki/NOP_slide[NOP]: https://en.wikipedia.org/wiki/NOP[examine]: https://sourceware.org/gdb/onlinedocs/gdb/Memory.html[stack pointer]: http://stackoverflow.com/questions/1395591/what-is-exactly-the-base-pointer-and-stack-pointer-to-what-do-they-point[little endian]: https://en.wikipedia.org/wiki/Endianness[big endian]: https://en.wikipedia.org/wiki/Endianness[endianness]: https://en.wikipedia.org/wiki/Endianness[pack]: https://docs.python.org/2/library/struct.html#struct.pack[ash]:https://en.wikipedia.org/wiki/Almquist_shell[dash]: https://en.wikipedia.org/wiki/Almquist_shell[shell]: https://en.wikipedia.org/wiki/Shell_%28computing%29[pwntools]: https://github.com/Gallopsled/pwntools[colorama]: https://pypi.python.org/pypi/colorama[objdump]: https://en.wikipedia.org/wiki/Objdump[UPX]: http://upx.sourceforge.net/[64-bit]: https://en.wikipedia.org/wiki/64-bit_computing[breakpoint]: https://en.wikipedia.org/wiki/Breakpoint[stack frame]: http://www.cs.umd.edu/class/sum2003/cmsc311/Notes/Mips/stack.html[format string]: http://codearcana.com/posts/2013/05/02/introduction-to-format-string-exploits.html[format specifiers]: http://web.eecs.umich.edu/~bartlett/printf.html[format specifier]: http://web.eecs.umich.edu/~bartlett/printf.html[variable expansion]: https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html[base pointer]: http://stackoverflow.com/questions/1395591/what-is-exactly-the-base-pointer-and-stack-pointer-to-what-do-they-point[dmesg]: https://en.wikipedia.org/wiki/Dmesg[Android]: https://www.android.com/[.apk]:https://en.wikipedia.org/wiki/Android_application_package[apk]:https://en.wikipedia.org/wiki/Android_application_package[decompiler]: https://en.wikipedia.org/wiki/Decompiler[decompile Java code]: http://www.javadecompilers.com/[jadx]: https://github.com/skylot/jadx[.img]: https://en.wikipedia.org/wiki/IMG_%28file_format%29[binwalk]: http://binwalk.org/[JPEG]: https://en.wikipedia.org/wiki/JPEG[JPG]: https://en.wikipedia.org/wiki/JPEG[disk image]: https://en.wikipedia.org/wiki/Disk_image[foremost]: http://foremost.sourceforge.net/[eog]: https://wiki.gnome.org/Apps/EyeOfGnome[function pointer]: https://en.wikipedia.org/wiki/Function_pointer[machine code]: https://en.wikipedia.org/wiki/Machine_code[compiled language]: https://en.wikipedia.org/wiki/Compiled_language[compiler]: https://en.wikipedia.org/wiki/Compiler[compile]: https://en.wikipedia.org/wiki/Compiler[scripting language]: https://en.wikipedia.org/wiki/Scripting_language[shell-storm.org]: http://shell-storm.org/[shell-storm]:http://shell-storm.org/[shellcode database]: http://shell-storm.org/shellcode/[gdb-peda]: https://github.com/longld/peda[x86]: https://en.wikipedia.org/wiki/X86[Intel x86]: https://en.wikipedia.org/wiki/X86[sh]: https://en.wikipedia.org/wiki/Bourne_shell[/bin/sh]: https://en.wikipedia.org/wiki/Bourne_shell[SANS]: https://www.sans.org/[Holiday Hack Challenge]: https://holidayhackchallenge.com/[USCGA]: http://uscga.edu/[United States Coast Guard Academy]: http://uscga.edu/[US Coast Guard Academy]: http://uscga.edu/[Academy]: http://uscga.edu/[Coast Guard Academy]: http://uscga.edu/[Hackfest]: https://www.sans.org/event/pen-test-hackfest-2015[SSID]: https://en.wikipedia.org/wiki/Service_set_%28802.11_network%29[DNS]: https://en.wikipedia.org/wiki/Domain_Name_System[Python:base64]: https://docs.python.org/2/library/base64.html[OpenWRT]: https://openwrt.org/[node.js]: https://nodejs.org/en/[MongoDB]: https://www.mongodb.org/[Mongo]: https://www.mongodb.org/[SuperGnome 01]: http://52.2.229.189/[Shodan]: https://www.shodan.io/[SuperGnome 02]: http://52.34.3.80/[SuperGnome 03]: http://52.64.191.71/[SuperGnome 04]: http://52.192.152.132/[SuperGnome 05]: http://54.233.105.81/[Local file inclusion]: http://hakipedia.com/index.php/Local_File_Inclusion[LFI]: http://hakipedia.com/index.php/Local_File_Inclusion[PNG]: http://www.libpng.org/pub/png/[.png]: http://www.libpng.org/pub/png/[Remote Code Execution]: https://en.wikipedia.org/wiki/Arbitrary_code_execution[RCE]: https://en.wikipedia.org/wiki/Arbitrary_code_execution[GNU]: https://www.gnu.org/[regular expression]: https://en.wikipedia.org/wiki/Regular_expression[regular expressions]: https://en.wikipedia.org/wiki/Regular_expression[uniq]: https://en.wikipedia.org/wiki/Uniq[sort]: https://en.wikipedia.org/wiki/Sort_%28Unix%29[binary data]: https://en.wikipedia.org/wiki/Binary_data[binary]: https://en.wikipedia.org/wiki/Binary[Firebug]: http://getfirebug.com/[SHA1]: https://en.wikipedia.org/wiki/SHA-1[SHA-1]: https://en.wikipedia.org/wiki/SHA-1[Linux]: https://www.linux.com/[Ubuntu]: http://www.ubuntu.com/[Kali Linux]: https://www.kali.org/[Over The Wire]: http://overthewire.org/wargames/[OverTheWire]: http://overthewire.org/wargames/[Micro Corruption]: https://microcorruption.com/[Smash The Stack]: http://smashthestack.org/[CTFTime]: https://ctftime.org/[Writeups]: https://ctftime.org/writeups[Competitions]: https://ctftime.org/event/list/upcoming[Skull Security]: https://wiki.skullsecurity.org/index.php?title=Main_Page[MITRE]: http://mitrecyberacademy.org/[Trail of Bits]: https://trailofbits.github.io/ctf/[Stegsolve]: http://www.caesum.com/handbook/Stegsolve.jar[stegsolve.jar]: http://www.caesum.com/handbook/Stegsolve.jar[Steghide]: http://steghide.sourceforge.net/[IDA Pro]: https://www.hex-rays.com/products/ida/[Wireshark]: https://www.wireshark.org/[Bro]: https://www.bro.org/[Meterpreter]: https://www.offensive-security.com/metasploit-unleashed/about-meterpreter/[Metasploit]: http://www.metasploit.com/[Burpsuite]: https://portswigger.net/burp/[xortool]: https://github.com/hellman/xortool[sqlmap]: http://sqlmap.org/[VMWare]: http://www.vmware.com/[VirtualBox]: https://www.virtualbox.org/wiki/Downloads[VBScript Decoder]: https://gist.github.com/bcse/1834878[quipqiup.com]: http://quipqiup.com/[EXIFTool]: http://www.sno.phy.queensu.ca/~phil/exiftool/[Scalpel]: https://github.com/sleuthkit/scalpel[Ryan's Tutorials]: http://ryanstutorials.net[Linux Fundamentals]: http://linux-training.be/linuxfun.pdf[USCGA]: http://uscga.edu[Cyberstakes]: https://cyberstakesonline.com/[Crackmes.de]: http://crackmes.de/[Nuit Du Hack]: http://wargame.nuitduhack.com/[Hacking-Lab]: https://www.hacking-lab.com/index.html[FlareOn]: http://www.flare-on.com/[The Second Extended Filesystem]: http://www.nongnu.org/ext2-doc/ext2.html[GIF]: https://en.wikipedia.org/wiki/GIF[PDFCrack]: http://pdfcrack.sourceforge.net/index.html[Hexcellents CTF Knowledge Base]: http://security.cs.pub.ro/hexcellents/wiki/home[GDB]: https://www.gnu.org/software/gdb/[The Linux System Administrator's Guide]: http://www.tldp.org/LDP/sag/html/index.html[aeskeyfind]: https://citp.princeton.edu/research/memory/code/[rsakeyfind]: https://citp.princeton.edu/research/memory/code/[Easy Python Decompiler]: http://sourceforge.net/projects/easypythondecompiler/[factordb.com]: http://factordb.com/[Volatility]: https://github.com/volatilityfoundation/volatility[Autopsy]: http://www.sleuthkit.org/autopsy/[ShowMyCode]: http://www.showmycode.com/[HTTrack]: https://www.httrack.com/[theHarvester]: https://github.com/laramies/theHarvester[Netcraft]: http://toolbar.netcraft.com/site_report/[Nikto]: https://cirt.net/Nikto2[PIVOT Project]: http://pivotproject.org/[InsomniHack PDF]: http://insomnihack.ch/wp-content/uploads/2016/01/Hacking_like_in_the_movies.pdf[radare]: http://www.radare.org/r/[radare2]: http://www.radare.org/r/[foremost]: https://en.wikipedia.org/wiki/Foremost_%28software%29[ZAP]: https://github.com/zaproxy/zaproxy[Computer Security Student]: https://www.computersecuritystudent.com/HOME/index.html[Vulnerable Web Page]: http://testphp.vulnweb.com/[Hipshot]: https://bitbucket.org/eliteraspberries/hipshot[John the Ripper]: https://en.wikipedia.org/wiki/John_the_Ripper[hashcat]: http://hashcat.net/oclhashcat/[fcrackzip]: http://manpages.ubuntu.com/manpages/hardy/man1/fcrackzip.1.html[Whitehatters Academy]: https://www.whitehatters.academy/[gn00bz]: http://gnoobz.com/[Command Line Kung Fu]:http://blog.commandlinekungfu.com/[Cybrary]: https://www.cybrary.it/[Obum Chidi]: https://obumchidi.wordpress.com/[ksnctf]: http://ksnctf.sweetduet.info/[ToolsWatch]: http://www.toolswatch.org/category/tools/[Net Force]:https://net-force.nl/[Nandy Narwhals]: http://nandynarwhals.org/[CTFHacker]: http://ctfhacker.com/[Tasteless]: http://tasteless.eu/[Dragon Sector]: http://blog.dragonsector.pl/[pwnable.kr]: http://pwnable.kr/[reversing.kr]: http://reversing.kr/[DVWA]: http://www.dvwa.co.uk/[Damn Vulnerable Web App]: http://www.dvwa.co.uk/[b01lers]: https://b01lers.net/[Capture the Swag]: https://ctf.rip/[pointer]: https://en.wikipedia.org/wiki/Pointer_%28computer_programming%29[call stack]: https://en.wikipedia.org/wiki/Call_stack[return statement]: https://en.wikipedia.org/wiki/Return_statement[return address]: https://en.wikipedia.org/wiki/Return_statement[disassemble]: https://en.wikipedia.org/wiki/Disassembler[less]: https://en.wikipedia.org/wiki/Less_%28Unix%29[puts]: http://pubs.opengroup.org/onlinepubs/009695399/functions/puts.html[disassembly]: https://en.wikibooks.org/wiki/X86_Disassembly[PLT]: https://www.technovelty.org/linux/plt-and-got-the-key-to-code-sharing-and-dynamic-libraries.html[Procedure Lookup Table]: http://reverseengineering.stackexchange.com/questions/1992/what-is-plt-got[environment variable]: https://en.wikipedia.org/wiki/Environment_variable[getenvaddr]: https://code.google.com/p/protostar-solutions/source/browse/Stack+6/getenvaddr.c?r=3d0a6873d44901d63caf9ad3764cfb9ab47f3332[getenvaddr.c]: https://code.google.com/p/protostar-solutions/source/browse/Stack+6/getenvaddr.c?r=3d0a6873d44901d63caf9ad3764cfb9ab47f3332[file]: https://en.wikipedia.org/wiki/File_%28command%29[mplayer]: http://www.mplayerhq.hu/design7/news.html[Audacity]: http://audacityteam.org/[john]: http://www.openwall.com/john/[unshadow]: http://www.cyberciti.biz/faq/unix-linux-password-cracking-john-the-ripper/[IRC]: https://en.wikipedia.org/wiki/Internet_Relay_Chat[IRC channel]: https://en.wikipedia.org/wiki/Internet_Relay_Chat[git branches]: https://git-scm.com/book/en/v2/Git-Branching-Branches-in-a-Nutshell[branches]: https://git-scm.com/book/en/v2/Git-Branching-Branches-in-a-Nutshell