Block cipher challenge

Level: CBC mode

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Ciphertext (hexencoded), for easy copy-paste

0b2fa60a372f72319b76b190cd7ff69df77e22ac2a4ce8c1df1fd2af6692d475f170dacb55bf07a56edd98e9f49ff99ad5b86667b9ca8a2881748452b4bf7a6c

Ciphertext (hexencoded):

0b2fa60a372f72319b76b190cd7ff69d f77e22ac2a4ce8c1df1fd2af6692d475 f170dacb55bf07a56edd98e9f49ff99a d5b86667b9ca8a2881748452b4bf7a6c

Plaintext (hexencoded):

0b2fa60a372f72319b76b190cd7ff69d 7b22757365726e616d65223a20226775 657374222c202269735f677565737422 3a20747275657d090909090909090909

Plaintext:

\x0b/\xa6\n7/r1\x9bv\xb1\x90\xcd\x7f\xf6\x9d {"username": "gu est", "is_guest" : true}\t\t\t\t\t\t\t\t\t

Final plaintext

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