1,368 Polish onet.pl Accounts Leaked in Stealer Log Dump

1,368 Records Tied to a Polish Web Portal Surface Online

HEROIC analysts identified a stealer log dataset labeled "onet.pl" shared in a Telegram channel on December 7, 2024. Onet.pl is a major Polish web portal and email service. The file contains 1,368 records, each pairing an email address with a plaintext password and the login URL the credentials were taken from.

Why This Is Dangerous

Because the passwords in this dump are plaintext, anyone who obtains the file can attempt to log into these onet.pl accounts immediately, with no password cracking required. A compromised onet.pl account can expose personal email, saved contacts, and any other Onet services tied to the same login.

What Was Exposed

• Email addresses linked to onet.pl accounts
• Plaintext passwords
• Login URLs for each account

Why This Matters

A breached email account is rarely an isolated problem. Attackers can use access to an onet.pl inbox to reset passwords on other services, read private messages, or send phishing emails from a trusted address to the victim's contacts. Anyone among these 1,368 accounts who reused their password elsewhere faces a wider risk of credential stuffing across other sites.

How Stealer Logs Work

This kind of leak typically comes from information-stealing malware that infects a victim's computer and copies saved browser logins in bulk. Whoever operates the malware, or buys the stolen data, often sorts the results by website or service, in this case pulling out accounts specific to onet.pl, before packaging the filtered list for sharing or sale on Telegram.

Check If You Are Affected

If you use onet.pl or any Polish web portal account, it is worth checking your exposure now. HEROIC's free breach scanner searches more than 400 billion breached records, including stealer logs like this one, so you can quickly find out if your details are at risk.