Root-me / Networks / Bluetooth – Unknown file Write-up

Today we gonna solve a network challenge called Bluetooth – Unknown file let’s get into it !

Challenge description :

Your friend working at NSA recovered an unreadable file in a hacker’s computer. The only thing he knows is that it comes from a communication between a computer and a phone.

The answer is the sha-1 hash of the concatenation of the MAC address (uppercase) and the name of the phone.

Example: 
AB:CD:EF:12:34:56myPhone -> 023cc433c380c2618ed961000a681f1d4c44f8f1


check the file type

$ file ch18.bin
ch18.bin: BTSnoop version 1, HCI UART (H4)

we are working with network challenge so let’s open it with WireShark classic move ,

result :

Cool ! , We got the mac address and the remote name let’s convert the mac address and the remote name t...

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TJCTF – Blank

<<TJCTF is a Capture the Flag (CTF) competition hosted by TJHSST’s Computer Security Club. It is an online, jeopardy-style competition targeted at high schoolers interested in Computer Science and Cybersecurity. Participants may compete on a team of up to 5 people, and will solve problems in categories such as Binary Exploitation, Reverse Engineering, Web Exploitation, Forensics, and Cryptography in order to gain points. The eligible teams with the most points will win prizes at the end of the competition.

CTFs are a great way for students to get interested in and learn techniques relevant to many fields of Computer Science. Anyone that enjoys learning and solving problems is encouraged to compete. For more information, please see our About page, or contact the organizer...

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