HEROIC Researchers Link PIECE PRIVATE 47 to 1,505 Stolen Logins

What HEROIC Analysts Found

HEROIC researchers tracked a combolist file dated July 8, 2025, uploaded to a private Telegram channel under the name "PIECE PRIVATE 47." The file contained 1,505 records pairing email addresses with plaintext passwords and the website URLs tied to each account. Analysts linked the file to the same pattern of small, frequently rotated combolists that circulate through Telegram groups dedicated to trading stolen login data.

Why This Is Dangerous

Every password in PIECE PRIVATE 47 is stored in plain text and matched to a specific site URL, meaning no cracking or guessing is required to use it. Researchers note that this ready-to-use format is exactly what makes even mid-sized combolists appealing to attackers looking for a quick way to test stolen logins against real accounts.

What Was Exposed

• Email addresses
• Plaintext passwords
• Associated website URLs

Why This Matters

Analysts link files like PIECE PRIVATE 47 directly to credential stuffing, the automated process where stolen email and password pairs are tried across many unrelated websites at once. If any of the 1,505 people in this leak reused a password on a bank, email provider, or online store, that account is now vulnerable to takeover. From there, attackers can drain funds, hijack the email account to reset other passwords, or commit identity theft using the stolen personal details.

How Combolist Leaks Work

A combolist pairs stolen usernames or emails with passwords, usually written as "email:password" on each line, and researchers frequently trace these files back to a mix of older breaches, malware infections, and previously leaked data rather than a single new hack. Files like PIECE PRIVATE 47 are typically compiled by an individual trader, given a private label, and circulated in small batches through Telegram, which makes them harder to track than a single large breach but no less risky to the people whose data they contain.

Check If You Are Affected

If you want to know whether your email is part of the PIECE PRIVATE 47 leak or any other exposure researchers have identified, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records. Run a free scan now to see if your credentials turned up in this leak.