Warning: 7,180 Yahoo Logins Leaked in ‘Yahoo 05.01’ Stealer Log

If you use Yahoo Mail, pay attention. A stealer log file labeled "yahoo 05.01" surfaced on Telegram in April 2023, exposing 7,180 login records tied to Yahoo accounts. This was not a breach of Yahoo's own servers. It's a batch of credentials pulled from individual computers infected with malware, where the victims happened to have their Yahoo email and password saved in the browser at the time.

Why You Should Take This Seriously Right Now

Every password in this file was stored in plaintext, meaning it's fully readable the moment someone opens the file, no cracking or guessing needed. And because each entry also includes the URL of the site it belongs to, whoever has this file can go straight to the login page and try the credentials immediately. If your Yahoo account is one of the 7,180 in here, the risk isn't hypothetical or delayed. It's active right now.

What Was Exposed in the "Yahoo 05.01" File

• Email addresses
• Plaintext passwords
• URLs (the login pages tied to each account)

Why This Matters for Your Other Accounts Too

If you reused your Yahoo password anywhere else, that other account is exposed too. Attackers run leaked email and password pairs through automated credential stuffing tools that test the same login across banking sites, shopping accounts, and other email providers. That's how a single leaked Yahoo login turns into account takeover, identity theft, or direct financial loss somewhere else entirely.

How Your Credentials End Up in a File Like This

Infostealer malware gets onto a device through cracked software, a fake browser update, or a malicious attachment, then quietly copies every saved password and autofill entry it finds, including whatever was stored for Yahoo. That data gets bundled with logs from other infected devices and uploaded to Telegram, where files like "yahoo 05.01" get passed around and used by anyone who downloads them.

Check If You Are Affected, Right Now

Don't wait to find out the hard way. HEROIC's free breach scanner checks your email against more than 400 billion leaked records in seconds, so you can see immediately if your Yahoo login or any other account was exposed and change your passwords before someone else uses them.