TryHackMe CTF Exposes Azure Cloud Privilege Escalation via Hardcoded SAS Token

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A TryHackMe capture-the-flag challenge called CryptoCabana simulates a real-world Azure cloud compromise stemming from poor security practices. Participants begin by discovering a hardcoded SAS token with read and list permissions embedded in client-side JavaScript on a static Azure website, granting unauthorized access to the storage account. Enumerating the storage containers reveals a hidden vault container holding a service principal credential file, which is then used to authenticate directly to Azure. From there, contestants explore an Azure Key Vault containing four secrets, including three key shards and a protected master key, with the flag reconstructed by retrieving older versions of a rotated shard. The challenge highlights critical cloud security risks such as long-lived tokens, publicly exposed credentials, and insufficient secret rotation practices.

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