How to decrypt binary string?

Question

Character encoding

There is a line:
AAAABQAAABABmA0jd7nJLaSjorhKieEaAAAAAw==
As I understand it, this is binary data in base64

After reviewing the result

00 00 00 05 00 00 00 10 01 98 0d 23 77 b9 c9 2d a4 a3 a2 b8 4a 89 e1 1a 00 00 00 03

aa 77 19 2f af cd 08 be 8a 80 dc a5 e2 a5 5d 22 6b 8f 68 9a f2 87 6d cd b3 f6 08 0e 14 c7 4a 45 f5 2e f3 62 4c 65 59 f4 ba 74 cc 25 a1 c1 54 6e 2b 2f f7 80 de 12 a1 98 39 ae b5 91

nothing is clear ...

The bottom line is that this data is sent to the site, which, in turn, if this data is not correct, does not give a positive result. Most likely in this parameter date/time is ciphered.

My task is that I need to decode the data in order to understand what is inside, and change this data on my own, but so far it is not clear what is inside base64 ... some kind of garbage.

Answer 1

00 00 00 05 00 00 00 10 01 98 0d 23 77 b9 c9 2d a4 a3 a2 b8 4a 89 e1 1a 00 00 00 03

int(4) = 5
int(4) = 16 (or 0x10)
string(1) = 2 bytes, because the first byte is the length
string(13) = 14 bytes
int(4) = 3