ULP 43879126 Combolist: 18.8 Million Credentials Exposed

HEROIC found the ULP 43879126 combolist on May 6, 2024, exposing 18,851,456 records containing email addresses, plaintext passwords, and URLs.

Why the ULP 43879126 Breach Is Dangerous

With nearly 19 million email-and-password pairs, ULP 43879126 is one of the largest credential datasets in circulation. ULP stands for URL/Login/Password -- a structured format where each entry pairs a login URL with the corresponding email and plaintext password, giving attackers precise targeting capability. At this scale, automated credential stuffing campaigns can test these pairs against hundreds of platforms simultaneously, compromising thousands of accounts within hours of the list becoming available.

What Was Exposed in the ULP 43879126 Leak

• Email Addresses -- 18.8 million U.S. user account identifiers
• Plaintext Passwords -- working credentials in immediately usable form
• URLs -- login endpoints paired with each credential for precise targeting

Why This ULP 43879126 Data Puts You at Risk

A combolist of 18.8 million records means there is a statistically significant chance that your email address appears in it. Once attackers successfully log into your email account, they can trigger password resets on every linked financial and e-commerce platform. The URL structure in ULP combolists makes these attacks especially dangerous because attackers already know which site each credential belongs to, dramatically increasing the success rate of account takeover attempts.

How Combolists Work

Combolists are massive aggregated credential files compiled from multiple data breaches, stealer logs, and previous combolist sources. They are formatted as URL:login:password triplets -- making them immediately usable in automated credential stuffing tools. The "43 879 126" designation likely refers to the number of lines or a reference ID in a criminal database. These files are distributed on Telegram and dark web forums where cybercriminals use them for large-scale account takeover operations targeting banking, e-commerce, and enterprise platforms.

Check If Your Data Was Exposed

HEROIC operates one of the world's largest breach databases, covering more than 400 billion leaked records. Use HEROIC's free breach scanner to check if your email address or credentials appeared in the ULP 43879126 combolist or thousands of other breaches in our database.