Corporate Credential Leak: Napoleon Corp UP 406 Exposes 11,531 Logins

Just one file number later, "UP 406 11K Napoleon Corp" hit the same Telegram channel on October 4, 2025, this time carrying 11,531 verified login records, nearly double the count of its companion release.

Why This Is Dangerous

The "Napoleon Corp" naming across multiple uploads suggests these dumps are tied to business or workplace related credentials rather than purely personal accounts. When corporate logins leak, the risk extends past the individual employee, attackers can use a single stolen password to try to work their way into internal systems, email servers, or shared business tools.

What Was Exposed

• 11,531 confirmed records
• Email addresses
• Plaintext passwords
• Login URLs tied to each account

Why This Matters

Businesses of every size run on logins, and a leak like this one threatens more than personal inboxes, it can expose vendor portals, internal tools, and shared accounts that employees don't even realize are tied to their personal email. One weak link is usually all it takes for a bigger intrusion to begin, wich is why credential leaks tied to workplace accounts deserve extra attention.

How Stealer Logs Work

This dump follows the exact same pattern as its predecessor, malware infects a device, silently harvests saved passwords and cookies, and ships them to an operator who packages and uploads the results under the same "UP" naming scheme. The fact that two related files appeared on the same day suggests the operator is releasing data in a steady, ongoing seires rather than a single dump.

Check If You Are Affected

Whether your login is personal or tied to work, it's worth checking against known breach data before a small leak turns into a bigger problem. HEROIC's free scanner searches more than 400 billion breached records and can imediately tell you if your email shows up in this leak or any other on file.