Block cipher challenge

Level: CBC mode

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Ciphertext (hexencoded), for easy copy-paste

0011362e0b54deffc3feb078db2be2855a1deb3f4d2867ec209bfb80c915dc778e62ac92463ab491da10d208f34aaa9d674f90ba724beffa1774e2c177f9e28d

Ciphertext (hexencoded):

0011362e0b54deffc3feb078db2be285 5a1deb3f4d2867ec209bfb80c915dc77 8e62ac92463ab491da10d208f34aaa9d 674f90ba724beffa1774e2c177f9e28d

Plaintext (hexencoded):

0011362e0b54deffc3feb078db2be285 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\x00\x116.\x0bT\xde\xff\xc3\xfe\xb0x\xdb+\xe2\x85 {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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