Block cipher challenge

Level: CTR mode

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Ciphertext (hexencoded), for easy copy-paste

2202aed1013e1074ff0e7e95b1f2b4be8f46d38b46bd700e14122267e072e973b37d26e38af7e42acb64db75fd96c53242ff3e8b76a2121d56c2418baecfbb5a

Ciphertext (hexencoded):

2202aed1013e1074ff0e7e95b1f2b4be 8f46d38b46bd700e14122267e072e973 b37d26e38af7e42acb64db75fd96c532 42ff3e8b76a2121d56c2418baecfbb5a

Plaintext (hexencoded):

2202aed1013e1074ff0e7e95b1f2b4be 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

"\x02\xae\xd1\x01>\x10t\xff\x0e~\x95\xb1\xf2\xb4\xbe {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

{"username": "guest", "is_guest": true}