50,864 US Records Exposed in the USA 01.09.txt Combolist Leak

50,864 Records Surface in the "USA 01.09.txt" Combolist

HEROIC analysts identified a combolist titled "USA 01.09.txt," uploaded by a Telegram user and dated 9 March 2023. The file contains 50,864 records pairing email addresses with plaintext passwords, along with the URLs each credential pair was tied to, making it one of the larger listings analysts have tracked recently.

Why This Is Dangerous

Because every password in this list is stored in plaintext, an attacker who obtains the file can log directly into an account with no cracking or decoding required. With 50,864 credential pairs matched to specific URLs, an attacker can automate logins across a huge number of accounts in a short amount of time.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs tied to each credential pair

Why This Matters

A combolist of this size is a significant asset for credential stuffing campaigns, where attackers test the same email and password combination across many other websites. Because password reuse is so common, one exposed login from this file can lead to account takeover on completely unrelated services, opening the door to identity theft and financial fraud well beyond the original site.

How Combolists Work

A combolist is a compiled text file of email and password pairs, often organized by region or date, as this one was labeled "USA" with a date-style filename. These files are typically gathered from older breaches or stealer malware, then bundled together and distributed on platforms like Telegram, where buyers run them through automated tools that check which credentials still work.

Check If You Are Affected

With 50,864 records from this combolist now circulating, it is well worth checking your own exposure. HEROIC's free breach scanner searches more than 400 billion leaked records, including combolists like this one, so you can find out immediately whether your email address was exposed and update your password before someone else uses it.