US Users Exposed: Files_17.10_18.21_8 Leaks 5,889,495 Rows

On October 10, 2024, a file with the plain, almost boring name Files_17.10_18.21_8 showed up in a Telegram channel where stolen login data gets traded like baseball cards. Inside were 5,889,495 rows of email addresses, plaintext passwords, and the URLs those logins belonged to. Most of the accounts in this particular dump trace back to people located in the United States, wich is part of why researchers who monitor these channels flagged it so quickly.

Why This Is Dangerous

A combolist this size is not a targeted hack of one company. It is a mass collection of usernames and passwords pulled together from many smaller sources and repackaged for resale or free distribution. Because the passwords sit in plaintext, anyone who downloads the file can read them instantly, no cracking or decryption required. That makes the data usable within minutes of being posted, and it usually spreads to multiple other channels and marketplaces almost imediately.

What Was Exposed

• Email addresses tied to nearly 5.9 million individual accounts
• Plaintext passwords stored right next to each email
• The specific URLs or services each login pair was used on

Why This Matters

If you reuse a password across more than one account, a leak like this can unlock far more than the original site it was tied to. Attackers automatically test these email and password pairs against banking portals, email providers, and shopping sites, betting that people recycle credentials. Given the scale here, that is a safe bet for criminals to make.

How Combolists Work

A combolist is assembled by merging credential pairs scraped from older breaches, phishing kits, and malware logs into one master file, then sorting or deduplicating the entries before sharing them. The people who build these lists rarely hack anything themselves. They act more like data brokers, collecting leaked pairs from other criminals and bundling them so buyers can run large scale login attempts against popular websites in a single automated pass.

Check If You Are Affected

You do not have to guess whether your email showed up in this dump or in one of the thousands like it. HEROIC maintains a free scanner built on more than 400 billion leaked records collected from breaches, combolists, and stealer logs, and you can check your email address against that entire dataset in seconds. If a match turns up, change the password on that account right away and on anything else where you used the same one.