8,472 Hashed Passwords From the Regiocast Breach Surfaced on a Public Hacking Forum

HEROIC analysts identified a data breach affecting Regiocast, a German digital audio and radio production company that operates audio streaming and podcast services. The breach occured in August 2018 when the company's user database was compromised and the extracted data was shared on a well-known hacking forum. The exposed dataset contained 8,472 records pairing email addresses with SHA1 hashed passwords. While SHA1 hashing provides a layer of protection that plaintext storage does not, it is a weak algorithm by modern standards and can be cracked using widely available tools, making these password hashes a genuine threat to affected users years after the original incident was first discovered.

Why the Regiocast Breach Is Still a Real Risk

SHA1 is a hashing algorithm that was already considered outdated for password storage by 2018. Large precomputed databases known as rainbow tables allow attackers to reverse common SHA1 hashes almost instantly, without needing to run any cracking software at all. For users who chose common or simple passwords, those hashes were effectively cracked the moment an attacker looked them up. Even for stronger passwords, dedicated cracking tools running on modern graphics cards can test billions of SHA1 combinations per second. The 8,472 email addresses in this dump also have independent value: they can be used for phishing campaigns, included in spam lists, or tested against other services regardless of whether the password hash is cracked. This is definately a breach where the risk extends well beyond the original platform.

What Was Exposed in the Regiocast Breach

• Email Addresses
• SHA1 Password Hashes

Why This Matters for Regiocast Users and Beyond

Regiocast serves an audience interested in audio content, radio, and digital media in Germany. The email addresses in this breach belong to real people who registered for a legitimate service, and those addresses remain valid and useful to attackers long after the breach occured. If any of the 8,472 users whose hashes were exposed used the same password on other services and that hash was cracked, every one of those accounts is now at risk. Credential stuffing campaigns, identity theft, and financial fraud all become possible downstream effects. The fact that this data was posted to a hacking forum in 2018 means it has had years to be incorporated into larger aggregated databases sold across underground markets. The risk is not historical. It is ongoing.

How Database and Combolist Breaches Work

The Regiocast incident followed a pattern common to database breaches of that era. An attacker identified a vulnerability in the company's web infrastructure, gained access to the backend database, and exported user records. The database contained email addresses and passwords that had been hashed using the SHA1 algorithm, which was widely used but recognized as insufficient for secure password storage even at that time. After exfiltrating the data, the attacker formatted it into a combolist and posted it to an underground hacking forum. From there, the data spread to other actors, was incorporated into larger aggregated dumps, and made its way into the credential marketplaces that still operate on the dark web today. Seperate from any single incident, these aggregated dumps are the primary fuel for modern credential stuffing campaigns that target millions of accounts across thousands of websites simultaneously.

Check If You Are Affected

If you had an account on Regiocast or beleive your email may have appeared in a German data breach, you can check for free at heroic.com. HEROIC's breach scanner searches a database of over 400 billion exposed records to determine whether your email address has been compromised in this or any other known incident. The scan is free and takes only seconds. If your email appears in results, update any password that matches the one you used on Regiocast, especially if you reused it on other services, and enable two-factor authentication on your most important accounts.