Missing Raindeer
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HTB{w34k_3xp0n3n7_ffc896}
How to solve
# Extract pubkey.der and secret.enc from mail.eml (secret.enc is b64 so, decode it first!)
# Then run rsactftool against it
python3 RsaCtfTool.py --publickey tmp/pub.key --uncipherfile dat/secret.enc