HackPack CTF 2021 Write-Ups

Euler’s Identity

MD5 = d8d540ae49aadd151b96feb4e0ff124f ::: e^
SHA1 = abb07ca45c9e7719e66e766b958d943f561b8de6::: ipi=

SHA-256 = c037c03ee627047a85df540c42d59c6b6028841704a7c706feff584a997fd2a3

**SHA1 =**5d3c4e0314c88f970ab3877e983527cf64d86a53

**MD5 =**6bb61e3b7bce0931da574d19d1d82c88

Each hash can be found by googling known hash websites.

flag{e^ipi=-1}

BF means best friend, right?

Reading the file reveals text encoded in brainfuck. Decode it for the flag.

“N"ot “G"am"I"ng a"N"ymore in “X"mas

Open the site while running burp, change the debug option from zero to one, go the the file location listed in your browser.

Aurora

Run exiftool on the downloaded file.