$ cat writeup.md…
$ cat writeup.md…
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.
Permission denied (requires tier.pro)
Sign in with GitHub, Discord, or Google to continue. No email required.
$sign in$ grep --similar