One Small File: Post.cybercity.dk Combolist Had 510 Stolen Logins

Post.cybercity.dk Combolist: 510 Accounts Traced to Telegram

HEROIC analysts traced a small combolist file referencing post.cybercity.dk to a Telegram upload in June 2026. The file contained 510 records, each pairing an email address with a plaintext password and the URL the login was captured from.

Why This Is Dangerous

A small file does not mean a small risk for the people in it. Because every password here is stored in plaintext, anyone who opens the file can read it instantly, and the matching email address and URL give an attacker everything needed to attempt a direct login to the account it belongs to.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs

Why This Matters

Small, focused combolists like this one are often just as useful to attackers as large ones, since the goal is credential stuffing, testing each of the 510 email and password pairs against other websites in hopes the password was reused. Anyone in this file faces the same risks as someone caught in a larger breach: account takeover, identity theft, and financial fraud if the same password unlocks a banking or shopping account.

How Combolists Work

A combolist is a plain text file that pairs stolen usernames or email addresses with their matching passwords, usually collected from older breaches, phishing pages, or malware and then packaged for resale or free distribution. Smaller batches like this one are often carved out from a single compromised source or a targeted phishing run, and once shared on Telegram they can be tested against login pages within minutes.

Check If You Are Affected

If you want to know whether your email address appears in this leak, HEROIC's free breach scanner checks it against more than 400 billion leaked records, including combolists like this one. It takes only a moment to search, and it is the fastest way to find out if you need to change a password before someone else uses it.