If You Reuse Passwords, the USA Part3 Leak Affects You

HEROIC's monitoring systems identified a stealer log collection called USA Part3, shared via Telegram in January 2023. As the name implies, this is part of a multi-volume series targeting U.S. users, and this installment alone contains 29,673 records. Each record includes an email address, a plaintext password, and the URL of the service where the credential was stolen. The existence of multiple parts in this series suggests a sustained campaign of credential harvesting against American internet users.

Passwords With Zero Protection

The 29,673 passwords in USA Part3 sit in the file as plain, unencrypted text. Any attacker who downloads this collection can read every password immediately. There is no hash to crack, no encryption to break. This is the most dangerous form of credential exposure because it eliminates every technical barrier between the stolen data and account compromise.

What Was Exposed

• Email addresses belonging to U.S.-based internet users
• Plaintext passwords captured directly from infected machines
• URLs revealing which online services and websites were targeted

The Personal Cost of Password Reuse

If you use the same password for multiple accounts, the USA Part3 dump is a direct threat to your entire online presence. Cybercriminals take the email-password pairs from this collection and run credential stuffing attacks against high-value targets: your bank, your primary email account, your cloud storage, your employer's systems. Every account that shares the same password as the leaked one is vulnerable. With 29,673 credential pairs, attackers can generate thousands of successful account takeovers in a single automated campaign.

Inside the Malware That Created USA Part3

Stealer logs like USA Part3 are assembled from data harvested by infostealer malware. These malicious programs — including variants like RedLine, Lumma, and Aurora — are distributed through phishing emails, cracked software installers, and malvertising. After infecting a device, they extract every saved password from the victim's web browsers, record login sessions, and capture authentication cookies. The stolen data is packaged into log files and distributed through underground channels, often organized by target country to attract specific buyers.

Check If Your Credentials Were Exposed

As part of a multi-volume U.S.-focused campaign, the odds of American users being affected by USA Part3 are significant. HEROIC's breach scanner lets you search across more than 400 billion compromised records from data breaches and stealer log collections worldwide. Enter your email to discover if your credentials appear in USA Part3 or any other breach, then act immediately: change exposed passwords, stop reusing credentials, and enable multi-factor authentication everywhere.