Любимый мультсериал (Favorite Cartoon)

Platform: hackerlab | Category: Misc | Type: Challenge | Difficulty: Easy | OS: Linux | Author: XESXOR | Date: 2025-12-24 | Status: Solved Techniques: Bill Cipher symbol substitution decoding, Pop culture reference identification, Visual symbol recognition

Summary

Task: Decode symbols from an image using a cartoon cipher. Solution: Identified Bill Cipher from Gravity Falls and decoded the symbols to get BILLPOWER.

Любимый мультсериал — HackerLab

Description

Используй шифр главного антагониста этого мультсериала

Files: task.zip → task.png

Analysis

Step 1: Extracting the archive

 bash read-only • copy allowed Copy
unzip task.zip
# Get task.png

Step 2: Image analysis

The image contains 9 symbols that look like cryptographic signs or runes.

Step 3: Cipher identification

The task description points to the "main antagonist of the cartoon series". The symbols in the image are characteristic of the Bill Cipher from the animated series "Gravity Falls". ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍

Bill Cipher is the main antagonist of the series, a triangular dream demon. The series uses a special cipher alphabet named after him.

Step 4: Bill Cipher alphabet

Bill Cipher uses symbol substitution, where each symbol corresponds to a letter of the Latin alphabet:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
[corresponding Bill Cipher symbols]

Solution

Decoding the symbols

Using the Bill Cipher correspondence table, we decode the 9 symbols from the image: ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍

Symbol 1 → B
Symbol 2 → I
Symbol 3 → L
Symbol 4 → L
Symbol 5 → P
Symbol 6 → O
Symbol 7 → W
Symbol 8 → E
Symbol 9 → R

Result: BILLPOWER

Online decoders

Online tools can be used for decoding:

• https://www.dcode.fr/gravity-falls-bill-cipher
• Search "Bill Cipher decoder" on Google

Reference: Bill Cipher

Bill Cipher is a dream demon from the animated series "Gravity Falls" (2012-2016). He appears as a yellow triangle with one eye, a top hat, and a bow tie. He is the main antagonist of the series. ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍

The series frequently uses cryptographic elements:

• Caesar Cipher (shift by 3) — in the first season
• Atbash Cipher — in the second season
• Bill Cipher — symbol substitution, named after the character

The series creators (Alex Hirsch) deliberately added hidden messages in the credits of each episode, which made Gravity Falls ciphers popular in the CTF community. ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍