tlen.pl Stealer Log: 10,338 Plaintext Passwords Now at Risk

HEROIC analysts identified a stealer log posted by a Telegram user on June 17, 2026, that exposed 10,338 records tied to the Polish messaging platform tlen.pl. The leaked dataset includes email addresses, plaintext passwords, and browsing URLs harvested from infected devices. Because these passwords were stored without any hashing or encryption, every credential in this dump is immediately usable by anyone who downloads it.

Why This Plaintext Password Dump Is Dangerous

When passwords appear in plaintext, attackers skip the usual cracking step entirely. They can copy and paste each credential directly into login forms across banking sites, social media platforms, cloud storage accounts, and email providers. The URLs included in this leak also reveal which websites each victim visited, giving attackers a precise roadmap of where to try each stolen password. Combined with email addresses, this creates a complete package for unauthorized access.

What Was Exposed in the tlen.pl Stealer Log

• Email Addresses tied to tlen.pl user accounts and other online services
• Plaintext Passwords captured directly from browsers and applications on infected machines
• URLs showing the specific websites and login pages each victim accessed

Why 10,338 Stolen Credentials Matter

Most people reuse the same password across multiple accounts. A single plaintext password from this stealer log could unlock a victim's email, online banking, shopping accounts, and workplace tools. Attackers use automated tools to test these credentials against hundreds of services in minutes, a technique known as credential stuffing. Even one successful match can lead to account takeover, financial fraud, or identity theft that takes months to resolve.

How Stealer Logs Harvest Your Credentials

Stealer logs are created by malware that silently infects a computer or mobile device, often through phishing emails, fake software downloads, or malicious ads. Once active, the malware monitors everything the user types and extracts saved passwords from web browsers, email clients, and other applications. It packages this stolen data into organized log files and sends them to the attacker. These logs then get traded and shared on platforms like Telegram, where they reach a wide audience of cybercriminals within hours of collection.

Check If Your tlen.pl Credentials Were Leaked

If you have ever used tlen.pl or any service with the same email and password combination, your accounts may be at risk. HEROIC maintains a breach database of over 400 billion compromised records. Use HEROIC's free breach scanner to search for your email address and find out whether your credentials appear in this stealer log or any other known data breach.