The KATANA_CLOUD Stealer Log Put 6,386 Stolen Passwords Online

KATANA_CLOUD Stealer Log Exposes 6,386 Records

HEROIC analysts identified another stealer log tied to the "KATANA_CLOUD FREE" upload, this one appearing on Telegram on July 3, 2025. The file exposed 6,386 records tied to United States users, including email addresses, plaintext passwords, and the URLs of the accounts those credentials unlock.

Why This Is Dangerous

Because these passwords were stored in plaintext, anyone who obtains the log can log in directly without cracking or guessing a thing. Each password is paired with the URL of the account it opens, turning the log into a ready-made target list for automated login attempts.

What Was Exposed

• Email addresses
• Plaintext passwords
• Associated account and API URLs

Why This Matters

Even a smaller stealer log like this one carries real risk, especially for anyone who reuses the same password on more than one site. A single leaked email and password pair can be used for credential stuffing across dozens of other services, leading to account takeover, unauthorized purchases, or identity theft.

How Stealer Logs Work

A stealer log comes from malware that infects a device and silently copies saved passwords, autofill details, and browsing activity from the browser. That data is sent back to the attacker, who compiles it into a log file and distributes or sells it, often through Telegram channels dedicated to trading stolen credentials. Because the information is pulled directly from the victim's browser, it tends to be accurate and immediately usable.

Check If You Are Affected

If you think your email address or a password you use may appear in this or another exposed dataset, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records. Run a free scan now and change any passwords you have reused elsewhere.