3,770,362 Unique Credentials Exposed in the LeakBase 32M ULP Breach

HEROIC analysts found that on June 24, 2024, a credential database labeled "32M ULP" was uploaded to a popular hacking forum by threat actor papatdurs, exposing 3,770,362 unique records drawn from a total dataset of approximately 32.5 million entries. The leaked data includes email addresses, plaintext passwords, and homepage URLs. The presence of unencrypted passwords alongside the specific URLs of services each victim uses makes this dataset directly actionable for large-scale account takeover operations.

Why This Is Dangerous

Nearly four million unique email-password combinations in plaintext represent an immediately deployable attack resource. Criminals can load these records into automated credential stuffing tools that test login credentials across banking, email, retail, and enterprise platforms within hours of acquisition. The homepage URLs embedded in each record remove any guesswork about which services a victim uses, allowing attackers to prioritize high-value targets such as financial institutions and corporate systems. Every unique record in this dataset represents a real person whose digital accounts are at risk.

What Was Exposed

• Email addresses
• Plaintext passwords
• Homepage URLs

Why This Matters

Credential databases of this scale are the primary driver of account takeover fraud, identity theft, and unauthorized financial transactions. When plaintext passwords reach criminal forums, they enable credential stuffing attacks that succeed at scale because password reuse across services remains widespread. Victims whose credentials appear here face risks including unauthorized purchases, fraudulent loan applications, email account compromise leading to cascading service takeovers, and social engineering attacks that leverage real account details. Organizations face downstream fraud liability when their customers' credentials are used in takeover attempts.

How Database Breaches Work

This release is classified as a database-type breach, meaning papatdurs aggregated credential data from one or more underlying sources and compiled the dataset into a structured dump totaling approximately 32.5 million records. After deduplication, 3,770,362 unique entries remained. The forum posting provided direct access to this compiled dataset, making it available to any actor willing to download it. This distribution model accelerates the time between initial data theft and active exploitation, as multiple threat actors can access and weaponize the data simultaneously.

Check If You Are Affected

HEROIC offers a free identity monitoring tool that searches across more than 400 billion exposed records to determine whether your credentials appear in this or related breaches. Given the scale of this dataset, individuals who reuse passwords across multiple services are at elevated risk. Run a free scan now to determine your exposure and take immediate steps including password changes and enabling multi-factor authentication on all accounts.