Piecehk Hotmail UHQ Combolist Leaks 1,000 Webmail Logins

Piecehk Hotmail UHQ Combolist: 1,000 Webmail Logins Exposed

In June 2025, HEROIC analysts identified a combolist called "Hotmail UHQ by Piecehk," uploaded to a Telegram channel. "UHQ" is shorthand criminals use for "ultra high quality," meaning the uploader claims these credentials were verified as working logins rather than pulled from a random, unchecked source. The file contained 1,000 records pairing Hotmail email addresses with plaintext passwords, along with the URLs tied to each account.

Why the Webmail Industry Angle Matters

Webmail providers like Hotmail sit at the center of a person's online identity. Password reset links, two-factor codes, and account recovery messages for banking, shopping, and social media accounts typically flow through email. A combolist that specifically targets webmail logins, and is marketed as "ultra high quality," is more dangerous than a random mixed list because attackers trust it enough to prioritize it, meaning these particular accounts may be targeted faster and more aggressively.

What Was Exposed

• Email addresses (Hotmail)
• Plaintext passwords
• URLs of the associated accounts

Why This Matters

Because these passwords were never hashed or encrypted, they can be used the moment the file changes hands. If any of these 1,000 people reused their Hotmail password on another site, banking, shopping, or social platforms are all exposed to the same credential stuffing risk. Losing control of a webmail account can also let an attacker reset passwords on other services tied to that inbox, turning one leaked login into access across many accounts.

How a Combolist Attack Works

A combolist is a compiled file of email or username and password pairs, often labeled by quality or source so buyers and other criminals know what they are getting. "UHQ" listings like this one are marketed as pre-checked and working, which means attackers can skip the step of verifying which logins are still active and go straight to using them. Once shared on Telegram, others download the file and run it through automated login tools targeting Hotmail and any other service where the password might have been reused.

Check If You Are Affected

If you have a Hotmail account, it is worth checking whether it appears in this leak. HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records and will tell you right away if you were exposed. If you find a match, change your password immediately and turn on two-factor authentication for extra protection.