cryptoPromedium

Wanna

spbctf

Task: Decrypt a ransomware-encrypted BMP file. Solution: Used known-plaintext attack to recover 16-byte XOR key from black pixels, then decrypted image data to reveal the flag.

$ ls tags/ techniques/
xorbmpecbransomwareimage_decryption
known_plaintext_attackxor_key_recoveryimage_reconstruction
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