One Telegram Upload, 6,602 Records: The Crypto Base Combo Leak

In February 2023, HEROIC analysts tracked a single Telegram upload labeled "6.6k crypto base." The file contains 6,602 records pairing email addresses with plaintext passwords and the URLs each login was tied to, with a name suggesting the credentials are focused on cryptocurrency-related accounts.

Why This Is Dangerous

Cryptocurrency accounts are a favorite target for criminals because transactions cannot be reversed once completed. If any of these 6,602 credentials open access to an exchange account or wallet service, an attacker who logs in successfully could drain funds before the owner even notices.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs linked to each login

Why This Matters

Beyond the direct risk to crypto holdings, anyone in this file who reused their password elsewhere is exposed to credential stuffing against their email, banking, or shopping accounts. A single reused password can turn one small leak into a much larger compromise.

How a "Crypto Base" Combolist Is Built

Lists like this one are typically assembled from stealer malware infections and phishing pages that specifically target cryptocurrency users, then filtered down to a themed batch, in this case sized at 6,602 records, and shared on Telegram under a name that tells buyers exactly what kind of accounts to expect.

Check If You Are Affected

Run a free scan with HEROIC's breach checker, which searches more than 400 billion leaked records, and if your email turns up, change your password and enable two-factor authentication on any crypto accounts immediately.