Another day, another challenge…
In this post, we’re starting a new series, the Advent of Cyber, hosted by TryHackMe. This is the fourth year of the Advent of Cyber, where a challenge is released every day leading to Christmas. There will be 25 challenges; we’re McSkidy, an elf trying to save Christmas.
In our eighth challenge, The Best Festival Company (TBFC) was using blockchain and attempting to mint cryptocurrency. It was determined TBFC was compromised, and all the currency was lost during the attack.
The topics explored in this challenge are smart contracts – the functionality, and a common security vulnerability called the re-entrancy attack.
Can we determine how to find and replay the attack? Find out below!
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