The Microsoft 45 Stealer Log: 161 Accounts Leaked on Telegram

The Microsoft 45 Stealer Log: 161 Accounts Leaked on Telegram

HEROIC analysts identified a stealer log labeled Microsoft 45, uploaded to a Telegram channel on 18 May 2026. The file contained 161 records, each pairing an email address with a plaintext password and the URL of the site where that login was captured. The label suggests the credentials are connected to Microsoft-linked accounts, pulled directly from devices infected with information-stealing malware.

Why This Is Dangerous

Unlike an old hacked database, a stealer log reflects credentials that were in active use at the time a device was infected. That makes the 161 logins in this file more likely to still work right now than passwords sitting in a years-old leak. An attacker does not need to guess or crack anything. The email, password, and login URL are already paired and ready to try.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the sites where the credentials were used

Why This Matters

A Microsoft account often connects to email, cloud storage, and other linked services, which makes it a valuable target. If any of the 161 people in this leak reused their password on other accounts, an attacker can use credential stuffing to try the same combination on banking, shopping, or social media sites. Once an attacker gets into one account, they frequently move on to others, opening the door to identity theft and financial fraud.

How Stealer Logs Work

A stealer log is generated by information-stealing malware that infects a device through a pirated download, a fake update, or a malicious attachment. Once running, it quietly harvests saved passwords, autofill entries, and active browser sessions, packaging everything into a text file. Logs like this one, in the hundreds of records, are often compiled from a handful of infected machines and then shared or sold on Telegram channels and dark web forums. Because the data comes straight from the victim's browser, it tends to be more current and more reliable than credentials pulled from older breach dumps.

Check If You Are Affected

If you use a Microsoft account or have reused a password across multiple services, it is worth checking whether your information has surfaced in this or any other leak. HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including stealer logs like this one, and tells you right away if you have been exposed. Run a free scan today to check your status.