Email Hunt

Flag name: Email Hunt

Anticipated level: Medium

Description:

I want to find the PGP Public Key of someone’s ProtonMail account, but all I got is a useless document he shared with me (https://docs.google.com/spreadsheets/d/1iBRs347v5xXICdgHm4-

sQBEFozbqhTABPIespxSBI20). Can you help me find it?

 

Note: Please submit the flag like this example:

—–BEGIN PGP PUBLIC KEY BLOCK—–

Version: ProtonMail

aBBBBBBBBBBBBBBBB

BBBBBBBBBBBBBBBBB

BBBBYz

—–END PGP PUBLIC KEY BLOCK—–

Flag: SBCTF{aBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBYz}

 

How to solve it?
Use api, xeuledoc, ProtOSINT and other tools to find the flag.

The final flag:

SBCTF{xjMEYZcIIhYJKwYBBAHaRw8BAQdAgXzkYJTBPtkxMSemLogafK1ryTzAsP

oUbjT8hQ6Wc4XNRXByaXY0dGUzbWFpbDBmbXIuOEBwcm90b25tYWlsLmNvbSA

8cHJpdjR0ZTNtYWlsMGZtci44QHByb3Rvbm1haWwuY29tPsKPBBAWCgAgBQJhlwg

iBgsJBwgDAgQVCAoCBBYCAQACGQECGwMCHgEAIQkQBcfjCjlf+3IWIQRSLQS+

kFOUoS EmSs4Fx+MKOV/7cgCtAP0dhlLk+UMY9FBnN/SiR+nIObn0q4f/AS2k8kRvu

A9cQgEA13kb1fTDmIGXp/rkTh9MSUt22m6rF5khiOr9yCYoTQrOOARhlwgiEgorBgE

EAZdVAQUBAQdARRDPDTZcD3gJkaXMzYOSGcLSY0M8PEMs8w0eI9ydnxcDAQg

HwngEGBYIAAkFAmGXCCICGwwAIQkQBcfjCjlf+3IWIQRSLQS+kFOUoSEmSs4Fx

+MKOV/7ck oLAQCjmVOWyFLflAz5dCinOZI0G8yOsduV8PSw2hvTeyiZMwEAkl9U2t

mg2i/XW5PckxqvNgxAZZkkEoQPWa6UpKICIw8==E+gi}