The OK Combolist: 1,662 Stolen Login Credentials Leaked

What HEROIC Analysts Found in the OK Combolist Leak

On May 26, 2025, HEROIC analysts identified a combolist labeled "OK" after it was uploaded to a Telegram channel by an individual user. The file contains 1,662 records pairing email addresses with plaintext passwords, along with the URLs of the login pages those credentials belong to. The accounts affected are tied primarily to the United States.

Why This Is Dangerous

The passwords in this file are stored in plaintext, which means anyone who gets a copy can read and use them right away, with no cracking involved. Combined with the matching email address and site URL, an attacker has a ready made set of instructions for logging into 1,662 different accounts.

What Was Exposed in the OK Combolist

• Email addresses
• Plaintext passwords
• URLs identifying the associated login sites

Why This Matters

Combolists like this one fuel credential stuffing attacks, where attackers run each email and password pair against popular websites to see which ones still work. Anyone in this leak who reused their password on another account faces a real risk of account takeover, unauthorized purchases, or worse if that account holds financial or personal information. Even a small percentage of successful logins across 1,662 records adds up to real victims.

How This Combolist Was Likely Built

Combolists are typically built by pulling email and password pairs from older breaches, phishing pages, or malware infected devices and combining them into a single plain text file. Once assembled, files like this are passed around or sold on Telegram, where low effort attackers can put them to use immediately without any technical expertise.

Check If You Are Affected

If you want to know whether your email address appears in this leak or others like it, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records. Run a scan today and update any passwords you may have reused elsewhere.