636 Hotmail Access Leak: Search Your Email Free at HEROIC

In March 2025, HEROIC analysts identified a stealer log file titled "636 FULL VALID HOTMAIL MAIL ACCESS," uploaded to a Telegram channel by an unidentified user. The file contained 502 records, each made up of an email address, a plaintext password, and the URL of the login page the credentials were used on, with the file's name indicating the accounts involved were Hotmail addresses confirmed to be working at the time.

Why This Hotmail Access Leak Is Dangerous

An email account is often the key to everything else a person uses online, since it is typically where password reset links get sent. Because these 502 passwords were stored in plaintext and labeled "valid" by whoever uploaded them, an attacker can log directly into the affected inboxes without any extra work.

What Was Exposed in This Hotmail Access Log

• Email addresses
• Plaintext passwords for each account
• URLs identifying the login pages the credentials were used on

Why This Matters

Access to an email inbox lets an attacker request password resets for banking, shopping, and social media accounts linked to that address, turning one compromised login into many. It also opens the door to further phishing, since criminals can send messages from a real, trusted email account to the victim's contacts.

How Stealer Logs Work

Stealer logs are produced by malware that infects a victim's device and copies saved credentials directly out of the browser, rather than through a breach of an email provider's servers. Victims are often infected through cracked software or malicious attachments. Criminals frequently verify which stolen logins still work before packaging them, labeling files like this one "valid" to signal the credentials were tested and confirmed active, before selling or sharing them on Telegram.

Check If You Are Affected

If you use Hotmail, Outlook, or any email service, it is worth checking your exposure. HEROIC's free breach scanner searches more than 400 billion leaked records to tell you quickly if your email address has shown up in a leak like this one.