How Byom.de’s 17,718 Emails Ended Up in a Telegram Leak
HEROIC analysts traced a combolist called "byom.de - 17.718 emails uploaded by a Telegram User" back to June 10, 2026. The file contains 17,718 records, each pairing an email address with a plaintext password and a linked URL.
How the Byom.de Email List Ended Up on Telegram
The file name itself tells part of the story: 17,718 emails, tied to the byom.de source, were compiled into a single combolist and then uploaded to Telegram, a platform criminals frequently use to distribute and trade credential lists. Once a file like this is posted in a public or semi-public Telegram channel, it can be downloaded, copied, and redistributed by anyone with access, multiplying its reach well beyond the original upload.
What Was Exposed
- Email addresses
- Plaintext passwords
- URLs linked to the accounts
Why This Matters
With 17,718 email-and-password pairs in plaintext, this list is built for credential stuffing, automated attempts to reuse the same login across banking, shopping, and social media sites. Anyone whose email appears in this file faces direct risk to that account, and if the password was reused elsewhere, the exposure can lead to account takeover, identity theft, and financial fraud.
How Combolists Work
A combolist bundles email-and-password combinations, often labeled by source or size like the "17.718 emails" tag on this one, into a single downloadable file. Because the passwords here are stored in plaintext rather than encrypted or hashed, there is no extra step required before the credentials can be tested against real accounts, which is exactly what makes lists like this valuable to attackers.
Check If You Are Affected
If your email address has ever been part of an online account, it is worth checking whether it appears in this leak. HEROIC's free breach scanner checks your address against a database of more than 400 billion leaked records, including combolists, stealer logs, and database dumps, so you can find out quickly and secure any account that is still at risk.
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