3.5mlnpl.7z «Safe»

: The Polish government’s cybersecurity agency, CERT Polska , along with the Ministry of Digital Affairs, took the unusual step of integrating this specific data into the official service bezpiecznedane.gov.pl . This allowed Polish citizens to check if their specific PESEL (national ID) or email was part of this high-profile "3.5mlnPL" archive.

: It remains one of the largest concentrated sets of data specifically targeting a single nationality (Poland), which made it a primary tool for "credential stuffing" attacks against Polish banks and e-commerce sites. Checking Your Data 3.5mlnPL.7z

The leak gained significant attention in early 2023 when the file was shared on several underground hacking forums and Telegram channels. Here is how it unfolded: Checking Your Data The leak gained significant attention

If you believe your information was in this file, you can check reputable breach notification sites like , which frequently indexes these major "combo" archives. While it was initially feared to be a

: The archive contained login credentials (emails and passwords) harvested from various sources. While it was initially feared to be a single breach of a major government portal or service, analysis revealed it was a "combo list" —a collection of data aggregated from many different, smaller breaches over several years.

: Cyber-security researchers and Polish authorities identified a 7-zip archive named 3.5mlnPL.7z circulating on the dark web.