Checking the file headers for corruption. If the RAR file won't open, attackers often use hex editors to fix the magic bytes (Rar! for version 4.x or newer).
Bolding the name of the competition or providing the file hash would help narrow this down. TolstГіi.rar
Unlike ZIP files, RAR archives require third-party software like WinRAR, WinZip , or open-source tools like unrar to be opened. Checking the file headers for corruption
RAR (Roshal Archive) is a proprietary archive format used for data compression and error correction, developed by Russian engineer Eugene Roshal. TolstГіi.rar
RAR files often utilize strong encryption (AES-256 in newer versions), making them common targets for password-recovery exercises in cybersecurity training. Forensic/CTF Context