Inside the .es Domain Stealer Logs: 5,283 Passwords Harvested

HEROIC's threat intelligence operations uncovered a stealer log file labeled .es being shared on Telegram. The dump focuses on credentials associated with Spanish-domain websites and contains 5,283 compromised records. Each entry maps an email address to a plaintext password and the specific .es URL where the login was captured. The data was harvested through infostealer malware infections on individual user devices.

Plaintext Exposure Eliminates All Defenses

The 5,283 passwords contained in this stealer log are stored in raw plaintext. No hashing algorithm was applied, and no encryption protects them. This means that anyone who accesses the file can read every password character by character. Plaintext credential exposure is the most severe form of password compromise because it gives attackers immediate, effortless access to try each login combination.

What Was Exposed

• Email Addresses — user identifiers associated with .es domain services and platforms
• Plaintext Passwords — login credentials captured in their original unprotected format
• URLs — Spanish-domain web pages where each credential was intercepted during login

Credential Reuse Makes Every Account Vulnerable

Many users employ the same password across multiple services. When credentials from .es websites are exposed, attackers do not stop at those sites. They use automated credential stuffing tools to test each email-password pair against international platforms — Gmail, Amazon, Facebook, banking portals, and enterprise applications. A password stolen from a Spanish retail site can just as easily unlock an English-language email account or financial service.

Technical Breakdown: How Infostealers Work

Infostealer malware is the technical backbone of stealer log operations. These programs target the SQLite databases where browsers like Chrome, Edge, and Firefox store saved credentials. After decrypting the browser's local password vault using Windows DPAPI or similar system-level keys, the malware extracts every username, password, and associated URL. It then packages this data alongside browser cookies and autofill entries before exfiltrating it to attacker infrastructure. The logs are sorted, filtered by domain, and distributed through channels like Telegram.

Check If Your Credentials Were Exposed

This .es-focused stealer log has been fully indexed in HEROIC's breach database, which contains more than 400 billion compromised records. Use HEROIC's free breach scanner to check whether your email address or password appears in this dataset. If your credentials are found, change the affected passwords immediately and enable two-factor authentication on all related accounts.