US-Linked Napoleon Corp Dump UP 403 Exposes 6,205 Login Records

On October 4, 2025, a file called "UP 403 106K Napoleon Corp" was uploaded to a Telegram channel, and despite the eye catching "106K" in its name, the verified portion of the dump contains 6,205 confirmed login records tied to US based accounts.

Why This Is Dangerous

Regional targeting matters because it often means the stolen credentials line up with services and habits common to a specific area, US banking apps, US retailers, and US based email providers. That overlap makes it easier for an attacker to guess which other accounts a victim probably holds and go straight after them.

What Was Exposed

• 6,205 confirmed records
• Email addresses
• Plaintext passwords
• Corresponding login URLs

Why This Matters

For the thousands of people whose logins landed in this file, the geography barely matters, what matters is that a real password tied to a real account is now floating around on Telegram. Still, understanding the regional pattern helps security teams predict wich other services might get targeted next using the same stolen data.

How Stealer Logs Work

Files labeled "UP" followed by a number, like this Napoleon Corp dump, usually indicate an upload from a specific malware operator's ongoing series of releases. Infostealer malware infects a device, quietly copies saved browser passwords, and ships them off to a server, where they eventually get organized, labeled, and posted in batches just like this one, occuring on a near weekly basis for some operators.

Check If You Are Affected

If you've used any US based service, banking, shopping, or email, it's worth taking two minutes to check your exposure. HEROIC's free scanner searches over 400 billion breached records and will tell you definately whether your information appears in this dump or another one.