Valid Hotmail 1k Good Leak: 1,009 Logins Risk Account Takeover

Valid Hotmail 1k Good Leak Puts 1,009 Accounts at Risk of Takeover

On April 17, 2024, HEROIC analysts identified a stealer log labeled "Valid hotmail 1k good," uploaded by a user on a Telegram channel. As the name suggests, the file was marketed as a pre-checked list of working credentials, containing 1,009 records that pair an email address with a plaintext password and the URL the login was used on.

Why This Is Dangerous

The word "valid" in this file's name is a warning sign in itself, it means the credentials were likely tested before being shared, so whoever obtains this log knows the logins actually work. Combined with plaintext passwords that require no cracking, this turns the 1,009 records into an immediately usable list for account takeover attempts against Hotmail and Outlook accounts.

What Was Exposed

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

Why This Matters

A verified working email login opens the door to more than just the inbox. Attackers can use access to a Hotmail account to intercept password reset emails for banking apps, shopping accounts, and social media, chaining one compromised login into several more. Because these credentials were pre-validated as working, the risk of rapid account takeover here is higher than with an unverified dump of the same size.

How Stealer Logs Work

Stealer logs like this one begin with infostealer malware infecting a victim's device and silently harvesting saved browser logins. What makes a "valid" list different is an extra step: criminals run automated checks against each stolen credential to confirm it still logs in successfully, then repackage only the working entries, in this case 1,009 of them, into a smaller, more valuable file for sale or distribution on Telegram.

Check If You Are Affected

Because this list was specifically curated to contain working logins, checking your exposure is especially worthwhile if you use a Hotmail or Outlook account. HEROIC's free breach scanner searches more than 400 billion leaked records, including verified stealer logs like this one, to show you if your email has been compromised. Run a free scan now and change your password immediately if you find a match.