M32yoshka

Platform: spbctf | Category: Crypto | Type: Challenge | Difficulty: Easy | OS: NA | Author: XESXOR | Date: 2026-03-08 | Status: Solved Techniques: Base32 decoding, Nested encoding detection, Repeated unicode_escape decoding

Summary

Task: Decode nested encoding (matryoshka-style). Solution: Base32 decode followed by 3 layers of unicode_escape decoding to reveal the flag.

M32yoshka — cryptokids20

Description

Nested encoding: Base32 → 3 layers of \xNN hex escapes.

Solution

base32decode → unicode_escape × 3 → 'Yep! The flag is REDACTED' ‍​‌‌​​‌​​​‌‌​​‌​​​​‌‌​‌​​​​‌‌‌​​‌​​‌‌​​​‌​​‌‌‌​​​​​‌‌​‌‌​​​‌‌​​​​‍