Cit0day Premium.tar.gz May 2026

The file is part of a massive 2020 data breach collection. Cit0day.in was a commercial service that indexed thousands of previously hacked databases for cybercriminals; after its shutdown, a 120GB backup of its contents was leaked publicly.

Use an isolated virtual machine (VM) or a dedicated "air-gapped" environment for extraction. These archives often contain malformed files or occasional malware included by the leakers. Extraction Commands: Linux/macOS: tar -xzvf Cit0day_Premium.tar.gz Cit0day Premium.tar.gz

The compressed file is roughly 50GB, but the fully extracted data can exceed 120GB . Ensure you have sufficient disk space. The file is part of a massive 2020 data breach collection

Thousands of smaller compressed files (often .rar or .zip within the main .tar.gz ) categorized by the original breached domain. 2. Extraction & Storage These archives often contain malformed files or occasional

Use scripts like the Cit0day Password Checker on GitHub to cross-reference personal or corporate domains against the leak list.

Since many passwords are unsalted MD5 or SHA-1 hashes, security researchers often use Hashcat or John the Ripper to audit the strength of the compromised passwords. 4. Verification and Action Cit0day | Search the Data Breach

The sheer number of files makes manual searching impossible. For research or security analysis, use automated tools: