KATANA_CLOUD FREE Leak Exposed 17,876 US Emails and Passwords

KATANA_CLOUD FREE Stealer Log Exposes 17,876 Accounts

HEROIC analysts identified a stealer log dataset tied to KATANA_CLOUD FREE that was uploaded by a Telegram user on March 24, 2024. The file contained 17,876 records, including email addresses, plaintext passwords, and the URLs of the services those credentials unlock. Unlike a database breach pulled from a company's servers, this data was harvested directly from infected devices, meaning every credential inside it was captured as someone actually typed it in.

Why This Is Dangerous

Because the passwords in this leak are stored in plaintext, no cracking or decryption is required. Anyone who obtains this file can immediately try each email and password pair against the URL it was captured from, and against other popular sites, banking apps, and email providers. If a person included in this leak reused a password anywhere else, an attacker already has a working key to that account too.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the associated login pages

Why This Matters

Stealer log data like this feeds directly into credential stuffing campaigns, where automated tools test stolen logins across hundreds of websites in minutes. For the 17,876 people in this dataset, that risk includes account takeover on email, shopping, and financial platforms, plus the potential for identity theft if the compromised accounts hold personal or payment information.

How Stealer Logs Work

A stealer log is the output of malware that infects a computer or phone and quietly copies saved passwords, browser autofill data, and login sessions before sending everything back to the attacker. The KATANA_CLOUD FREE file matches this pattern exactly: email addresses, plaintext passwords, and the URLs where they were entered, all bundled together and shared on Telegram, a common distribution point for this kind of stolen data.

Check If You Are Affected

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. If your information turns up in this or any other breach, HEROIC can help you change the exposed passwords before they're used against you.