How a Telegram Combolist Leaked 419,351 Japan-Tied Logins

It started, as most of these leaks do, with a single upload to a Telegram channel. On November 15, 2025, a user posted a file called "COMBOLIST 422K JAPAN MIX FRESH," advertising a huge, freshly harvested batch of login data. When the file was verified, it held 419,351 records rather than the rounded 422,000 in its name, but the real number is still massive: 419,351 email addresses, each paired with a plaintext password and the URL of the site it unlocks.

How a Combolist of This Size Comes Together

A combolist is simply a combined list of logins pulled from multiple sources and merged into one file. The "fresh" label is the key detail here: it signals the data was newly collected, not recycled from an old breach, which makes it far more valuable to buyers because the passwords are more likely to still work. Every one of the 419,351 entries represents a real account somewhere that a person logs into.

What Was Exposed

• Email addresses for over 419,000 accounts
• Plaintext passwords, stored without any hashing or encryption
• URLs showing exactly which login page each set of credentials belongs to

Why This Matters

A combolist this large is built for automation. Attackers load files like this into scripts that test every email and password pair against dozens of popular websites in seconds, a technique known as credential stuffing. Any match becomes an account takeover, and from there it is a short step to identity theft or financial fraud, especially for anyone who reuses the same password across multiple accounts.

How Fresh Combolists Get Assembled

Reaching hundreds of thousands of records usually means combining output from many infected devices at once. Infostealer malware collects saved logins one machine at a time, and operators pool those individual harvests together, strip out duplicates, and merge everything into a single combolist before it gets a catchy name and a Telegram post announcing its release.

Check If Your Login Is In This Combolist

With more than 419,000 records in circulation, there is a real chance your email address is one of them. HEROIC's free breach scanner checks your email against more than 400 billion leaked records, including combolists like this one, and shows you immediately if you have been exposed. If you find a match, change that password everywhere it has been reused and add two-factor authentication to your most important accounts.