Inside the Microsoft_Hits Combolist: How 827 Logins Got Stolen

In June 2025, HEROIC analysts identified a combolist titled "Microsoft_Hits" uploaded by a Telegram user, containing 827 records that pair email addresses with plaintext passwords and the URLs they were collected from.

Why This Is Dangerous

Because the passwords are unencrypted, anyone who obtains this file can immediately try logging into the associated accounts. No cracking, guessing, or technical skill is required, only a copy of the list.

What Was Exposed in the Microsoft_Hits Leak

• Email addresses
• Plaintext passwords
• Source URLs

Why This Matters

Accounts tied to Microsoft services often connect to email, cloud storage, and work logins. If any of these 827 credentials were reused elsewhere, attackers can pivot from one exposed login into email takeover, financial fraud, or corporate account compromise.

How a Combolist Attack Works

A combolist is a curated file of stolen username or email and password pairs, often gathered from a mix of older breaches and phishing campaigns and labeled by whoever assembled it, in this case as "Microsoft_Hits". Criminals distribute these files on Telegram and forums, then use automated tools to test every pair against real login pages in a process called credential stuffing.

Check If You Are Affected

Search your email in HEROIC's free breach scanner, which covers more than 400 billion exposed records including this Microsoft_Hits list. If your account is listed, change the password right away and enable multi-factor authentication wherever possible.