$ cat writeup.md…
$ cat writeup.md…
tryhackme
Task: TCP service XOR-encrypts a THM{...} flag with a random 5-char repeating key and hex-encodes it, revealing a second flag if you submit the correct key. Solution: known-plaintext attack using the THM{ prefix and trailing } to recover all 5 key bytes instantly, then replay the key to obtain flag 2.
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