We are given a file that looks like this:

From what we can see, it looks like it's a text encoded in Base64 for 8 times. (8 x 64)

So I copied and pasted the text on [CyberChef](https://gchq.github.io/CyberChef/#recipe=From_Base64('A-Za-z0-9%2B/%3D',true)From_Base64('A-Za-z0-9%2B/%3D',true)From_Base64('A-Za-z0-9%2B/%3D',true)From_Base64('A-Za-z0-9%2B/%3D',true)From_Base64('A-Za-z0-9%2B/%3D',true)From_Base64('A-Za-z0-9%2B/%3D',true)From_Base64('A-Za-z0-9%2B/%3D',true)From_Base64('A-Za-z0-9%2B/%3D',true)&input=CgoKCgoKCgogICAgICAgICAgICAgICBWbTB3ZUU1R2JGZFdXR2hVViAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAwZG9XRll3Wkc5V1ZsbDMgICAgICAgICAgICBXa1JTV0ZKCiAgICAgICAgICAgICAgIHNiRCAgICAgICAgICAgTlpWICAgICAgICAgICAgICAgICAgICBWWiAgICAgIFBWICAgICAgICAgICAgICAgICAgICAgICAgICAgIDJ4YSAgICAgICAgICAgICAgICAgICAgICAgYzFOICAgc1dsCiAgICAgICAgICAgICAgIGRTTSAgICAgICAgICAgMUpRICAgICAgICAgICAgICAgICAgICAgVmogICAgSjQgICAgICAgICAgICAgICAgICAgICAgICAgICAgIFlXUiAgICAgICAgICAgICAgICAgICAgICBXUm4gICAgTmhSCiAgICAgICAgICAgICAgIG1SWCAgICAgICAgICAgVFRGICAgICAgICAgICAgICAgICAgICAgIEtlICBWZCAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIFdaRCAgICAgICAgICAgICAgICAgICAgIFJaViAgICAgMUpYCiAgICAgICAgICAgICAgIFVtNUtZVkp0YUc5VVZtaENaICAgICAgICAgICAgICAgICAgICAgICBXeGsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIFYxVnJaRlJpVmxwSVYydCAgICAgICAgb1YyICAgICAgRkdTCiAgICAgICAgICAgICAgIG5OaiAgICAgICAgICAgUm1oICAgICAgICAgICAgICAgICAgICAgVlYgICBrViAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIEtURiAgICAgICAgIGxxUiAgICAgICBtRmogICAgICAgYkd0CiAgICAgICAgICAgICAgIDZZVSAgICAgICAgICAgWlNUICAgICAgICAgICAgICAgICAgICBsWiAgICAgWVEgICAgICAgICAgICAgICAgICAgICAgICAgICAgIGxwVyAgICAgICAgIFZ6RSAgICAgIHdWaiAgICAgICAgRmtTCiAgICAgICAgICAgICAgIEZOciAgICAgICAgICAgYkZKICAgICAgICAgICAgICAgICAgIGhlICAgICAgIG14ICAgICAgICAgICAgICAgICAgICAgICAgICAgIGhWbSAgICAgICAgIHBPYiAgICAgMkZHICAgICAgICAgVW5OCiAgICAgICAgICAgICAgIFhiVVpVVWpGYVNWcEZXbUZVICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIGJGcFpVV3hzVjFaNlFYaCAgICAgVmFrcEhVMFphZFZKc1NsZFNNCiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgMDAx) and decoded it for 8 times.

And we get the flag which is: **CTF{w3c-ctf-z0z2_3ry9t0}**