Analysts Spot 3.3K Hotmail Combo List: 2,564 Logins Leaked on Telegram

In July 2026, HEROIC analysts spotted a file circulating on Telegram labeled a "3.3K Hotmail Combo List, Full Valid," containing 2,564 records of Hotmail account credentials. The list included email addresses, plaintext passwords, and the URLs of the login pages each credential was tested against, packaged as a set of logins the uploader claimed had already been confirmed to work.

Why This Is Dangerous

What makes this file more concerning than a standard credential dump is the "Full Valid" claim attached to it. That label means the 2,564 email and password pairs have reportedly already been tested and confirmed active, so an attacker does not have to sort through dead or outdated entries. Combined with the exact login URL for each account, the file gives anyone who obtains it a direct, ready-to-use path into each Hotmail inbox.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the associated login pages

Why This Matters

Email accounts sit at the center of most people's digital lives, often used to reset passwords and verify identity across banking, shopping, and social media platforms. A verified list like this one raises the odds that a compromised Hotmail account leads directly to account takeover, since the credentials are claimed to be current rather than years old. For anyone who reuses passwords, the risk extends further still, since attackers can attempt credential stuffing against other services using the same email and password combination.

How Combo Lists and Stealer Logs Work

Combo lists like this one usually originate from stealer log malware, which infects a device and quietly harvests saved browser passwords, autofill entries, and active login sessions. Criminals then run those raw logs through automated tools that attempt each login and mark which ones still work, turning a messy stealer log into a refined, "full valid" list like this 2,564-record file. Because only working credentials make the final cut, these curated lists tend to be more dangerous than the raw logs they came from, and they circulate readily on Telegram channels and dark web marketplaces.

Check If You Are Affected

If you use a Hotmail or Outlook account, it is worth checking whether your login appears in this list or any other leak. HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including verified combo lists like this one, so you can find out your exposure and update any at-risk passwords right away.