Skip to content

8bitdev0x8/CYBERGITZ-CTF-SEASON-1

Repository files navigation

CTF-Challenge–1

Table of Contents
  1. THE HEDGEHOG
  2. STEGANOSAURUS
  3. TOMATO SAUCE
  4. GOLLUM THE EXPLORER
  5. THE FRENCH CONNECTION
  6. DROP THE BASS!
  7. ITS SUB TIME!
  8. MEIN KAMPF
  9. SMS OF THE INTERNET
  10. THIS PANDEMIC
  11. DATA OF DATA
  12. MORROCO
  13. CARDIOGRAM
  14. STEGNUM OPUS
  15. Contributing

01.THE_HEDGEHOG–10_POINTS

Sonic_visualizer

Sonic visualizer is a tool for viewing and analyzing the contents of audio files, however it can be helpful when dealing with audio steganography. You can reveal hidden shapes in audio files. Website

sudo apt-get install sonic-visualiser
flag{iwillbreakyourheart}

02.STEGANOSAURUS–30_POINTS

Steghide

Steghide is a steganography program that hides data in various kinds of image and audio files , only supports these file formats : JPEG, BMP, WAV and AU. but it’s also useful for extracting embedded and encrypted data from other files.

It can be installed with apt however the source can be found on github.

steghide extract -sf <filename>
Base64 - ZmxhZ3t3b3d5MHVmMHVuZDF0fQ== 

Base64 Decoded - flag{wowy0uf0und1t}

03.TOMATO_SAUCE–30_POINTS

View Source using Web Inspector, Flag is hidden in CSS file.

flag{turnitleaveitstopformatit}

alt text

04.GOLLUM_THE_EXPLORER–20_POINTS

This flag doesn’t have a format and is one word.

Exiftool

Sometimes important stuff is hidden in the metadata of the image or the file , exiftool can be very helpful to view the metadata of the files. You can get it from here

Ubuntu, Debian, Mint, Kali

sudo apt install libimage-exiftool-perl
exiftool <filename>

GPS Cordinate data can be found in meta.

Enter coordinates to find a place

On your computer, open Google Maps In the search box at the top, type your coordinates. Here are examples of formats that work: Degrees, minutes, and seconds (DMS): 41°24'12.2"N 2°10'26.5"E Degrees and decimal minutes (DMM): 41 24.2028, 2 10.4418 Decimal degrees (DD): 41.40338, 2.17403 You'll see a pin show up at your coordinates.

flag{naalumanikkkattu}

05.THE_FRENCH_CONNECTION–10_POINTS

Vigenère KEY : MOVIE

Cipher : rzvo{xts_dvxaixpenzza}

Resource : cyberchef

flag{the_intouchables}

06.DROP_THE BASS!–10_POINTS

Base64

Base64 is a group of binary-to-text encoding schemes that represent binary data (more specifically, a sequence of 8-bit bytes) in an ASCII string format by translating the data into a radix-64 representation. The term Base64 originates from a specific MIME content transfer encoding. Each non-final Base64 digit represents exactly 6 bits of data. Three 8-bit bytes (i.e., a total of 24 bits) can therefore be represented by four 6-bit Base64 digits.

Base64 Cipher : ZmxhZ3tXM19sMHYzX2hhY2tpbmd9

flag{W3_l0v3_hacking}

07.ITS_SUB_TIME!–10_POINTS

Substitution Cipher

substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing the inverse substitution process to extract the original message.

Alphabetical Substitution-

Cipher : ysau{ekbhm0_ol_sgxt!}

KEY : AZERTYUIOPQSDFGHJKLMWXCVBN

flag{crypt0_is_love!}

08.MEIN_KAMPF–10_POINTS

Cipher : qbhbh zrmua irddh ljhmw uvh

The settings for the machine are:

Model: G-312

Reflector: UKW 11/26

Rotor 1: 2/12/6

Rotor 2: 1/17/16

Rotor 3: 3/12/1

flag{derflagistpeakyblinders}

09.SMS_OF_THE_INTERNET–10_POINTS

Cipher

Capture the flag cοntest ⅰs a сybersecurⅰty competition 

Twitter Secret Messages

Hide secret messages in your tweets (or any text) with steg-of-the-dump.js. Site

flag{steganoispower}

10.THIS_PANDEMIC–10_POINTS

Strings

Strings is a linux tool that displays printable strings in a file. That simple tool can be very helpful when solving stego challenges. Usually the embedded data is password protected or encrypted and sometimes the password is actaully in the file itself and can be easily viewed by using strings It’s a default linux tool so you don’t need to install anything.

strings <filename>
flag{stay_h0m3_stay_saf3}

11.DATA_OF_DATA–20_POINTS

strings <filename>
flag{da_vinci_cod3}

12.MORROCO–10_POINTS

Morse code

Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. DataBorder

flag{YOUR FLAG IS OPENSESAME}

13.CARDIOGRAM–20_POINTS

PNG embedded in PDF

alt text

flag{4023124842131283}

14.STEGNUM_OPUS–20_POINTS

Zsteg

zsteg is a tool that can detect hidden data in png and bmp files.

install

zsteg <filename>

The source can be found on github

zsteg <filename>
flag{3v3rything_aint_cut3}

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update as appropriate.

8bitdev0x8

About

flag{Decoded}

Resources

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published