Block cipher challenge

Level: CTR mode

Sorry, you're not an admin (need is_admin: true)



Ciphertext (hexencoded), for easy copy-paste

350f20745a0b2ea70ffa5db3e04cba5c8dc6858e6ee29bf0578e7dc876b900f11ac52d5605aab6dea9d83f8320245f4cdcf25019a225268d081d05fd8cd2202f

Ciphertext (hexencoded):

350f20745a0b2ea70ffa5db3e04cba5c 8dc6858e6ee29bf0578e7dc876b900f1 1ac52d5605aab6dea9d83f8320245f4c dcf25019a225268d081d05fd8cd2202f

Plaintext (hexencoded):

350f20745a0b2ea70ffa5db3e04cba5c 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

5\x0f tZ\x0b.\xa7\x0f\xfa]\xb3\xe0L\xba\\ {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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