The 4075 Lines Hotmail Leak Puts 4,032 Accounts at Real Risk

HEROIC analysts identified a combolist titled 4075 LINES HOTMAIL uploaded to Telegram on 13-Jul-2025. The filename references 4,075 lines, though our verified count shows 4,032 usable records, each pairing a Hotmail email address with a plaintext password and a linked URL. Why This Is Dangerous: Because these passwords sit in plaintext, an attacker can copy each pair directly out of the file and attempt to log in immediately, with no cracking or guessing required. What Was Exposed: - Hotmail email addresses - Plaintext passwords - URLs tied to each account Why This Matters: A leaked Hotmail login is rarely the end of the story. Once inside an email account, an attacker can search for financial statements, reset passwords on connected accounts, and impersonate the account holder to contacts, turning a single leaked credential into identity theft, financial fraud, or both. How a Combolist Like This Works: Lists like this are typically compiled by targeting one email provider, in this case Hotmail, gathering credentials through phishing, malware, or prior breaches, then bundling them into a plain text file for distribution on Telegram. Focusing on a single provider makes the resulting combolist easier for buyers to use in targeted account takeover attempts. Check If You Are Affected: If you use a Hotmail address, check it against HEROIC's free breach scanner, which searches more than 400 billion leaked records, to see whether your credentials were part of this leak or any other exposure.