HQ Hotmail Combo Leak Means 7,227 Accounts Are at Risk

HEROIC discovered a stealer log collection titled HQ Hotmail Combo NEO3690, distributed on Telegram in February 2025, containing 7,227 compromised credential records. The collection specifically targets Hotmail account holders, with credentials harvested by infostealer malware and curated into a high-quality combo list designed for immediate exploitation by threat actors.

Plaintext Passwords Create Instant Account Access

Every password in the HQ Hotmail Combo dump exists in plaintext — completely unprotected and immediately usable. Attackers do not need cracking tools, rainbow tables, or computational power. They simply open the file, find a credential, and log in. For Hotmail and Microsoft account holders, this means their inbox, OneDrive files, and linked services are all one click away from compromise.

What Was Exposed

• Email Addresses — Hotmail accounts that double as Microsoft account logins for Outlook, OneDrive, and Xbox
• Plaintext Passwords — unencrypted, ready-to-use passwords captured from victims' devices
• URLs — the login pages and web services where each credential was intercepted

Credential Stuffing Puts Every Connected Account at Risk

Threat actors use the email-and-password pairs from this Hotmail combo list to launch automated credential stuffing attacks against dozens of services simultaneously. Banks, streaming platforms, e-commerce sites, and social networks are all tested within minutes. Because Hotmail accounts often serve as recovery emails for other services, compromising one Hotmail login can give attackers a pathway to reset passwords across an entire digital footprint.

Stealer Logs and How They Are Built

Infostealer malware is responsible for generating these credential logs. The malware spreads through infected software downloads, phishing campaigns, and malicious advertisements. Once active on a device, it harvests credentials stored in browsers, records login activity in real time, and captures session tokens. The stolen data is compiled into organized log files, then shared or sold through Telegram groups and dark web markets, where it is repackaged into targeted collections like this Hotmail combo list.

Check If Your Credentials Were Exposed

The HQ Hotmail Combo NEO3690 dataset has been indexed in the HEROIC data breach scanner. With more than 400 billion records in its database, HEROIC can confirm in seconds whether your email or password was included in this leak or any other known breach. Search your credentials now, immediately update any compromised passwords, and enable two-factor authentication on your Hotmail and all connected accounts.