The KRDCLOUD Japan Leak: 3,603 Passwords Exposed. Yours Might Be One.

HEROIC analysts identified a stealer log dataset, tracked as 3963_Japan_KRDCLOUD, that a Telegram user uploaded on 16-Jul-2026. The file contains 3,603 records pulled from infected devices, including email addresses, plaintext passwords, and the login page URLs tied to those accounts. The naming suggests the data was organized as part of a batch tied to Japan.

Why This Is Dangerous

There is nothing subtle about what this file offers an attacker. Each of the 3,603 records hands over a working email address, a plaintext password, and the exact site it opens. No cracking, no phishing, no waiting, just a direct login sitting in a text file.

What Was Exposed

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

Why This Matters

With 3,603 records exposed, this file gives attackers a sizable list to test against other services. If a password from this leak is reused anywhere else, it opens the door to credential stuffing, account takeover, and in more serious cases identity theft or financial fraud.

How Stealer Logs Work

Stealer log malware infects a device, often through a fake download, cracked software, or a malicious attachment, and quietly copies saved browser passwords, autofill data, and session details. The stolen data is then organized into labeled batches, in this case one numbered and tied to a specific cloud service and region, before being shared through channels like Telegram. Because the malware grabs whatever the browser has saved, one infected device can expose logins for many unrelated accounts at once.

Check If You Are Affected

If you want to know whether your information appears in the 3963_Japan_KRDCLOUD file or any other breach, HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records. Run a scan now and secure any account that shows up.