“microsoft 17” Stealer Log Leaks 123 Emails and Passwords

In May 2026, HEROIC threat intelligence analysts found a stealer log named "microsoft 17" uploaded to a Telegram channel used for trading stolen credentials. Posted on May 14, 2026, the file held 123 records, each combining an email address, a plaintext password, and the URL where that login was captured.

Picture This: Your Login Sitting in a Criminal's File

Imagine a single spreadsheet-style file that lists your email address, your exact password in plain text, and the website you use it on, sitting in a Telegram channel where anyone can download it. That is essentially what "microsoft 17" is. It is not evidence that a company called Microsoft was hacked. The name is simply the label the uploader gave this particular batch of stolen data, likely because some of the captured logins were tied to Microsoft-related services. For the 123 people in this file, the risk is just as real either way.

What Was Exposed in the "microsoft 17" Stealer Log

• Email addresses
• Plaintext passwords
• URLs tied to each set of captured login credentials

Why This Matters, Even for a Small Leak

A batch of 123 records may look small next to headline-making breaches, but the danger to each person in it is identical. With a working email, password, and URL in hand, an attacker can attempt credential stuffing across other sites, take over accounts directly, or use the information as a stepping stone toward identity theft and financial fraud. Scale does not change what plaintext credentials can do in the wrong hands.

How a Stealer Log Like "microsoft 17" Gets Made

Stealer logs are produced by infostealer malware, software that infects a device and quietly copies whatever is saved in the browser: usernames, passwords, autofill entries, and the web addresses tied to each one. The infected machine's haul is then packaged into a file, given a label by whoever collected or resold it, and shared or sold through Telegram channels and dark web forums. The name attached to the file, such as "microsoft 17," often reflects a batch number or a guess at its contents rather than a confirmed corporate breach.

Check If You Are in the "microsoft 17" Leak

If you want to know whether your email address turned up in this file or any other leak, HEROIC's free breach scanner checks it against a database of more than 400 billion leaked records. Run a scan now, and if you find a match, change that password immediately, especially anywhere else you may have reused it.