The Denmark 9 Combolist Put 181,789 Stolen Logins Online

In January 2023, HEROIC analysts found a combolist labeled Denmark 9 uploaded by a user on Telegram. The file contained 181,789 records made up of email addresses, plaintext passwords, and URLs tied to the accounts. Why This Is Dangerous: a combolist of this size gives an attacker a large batch of working email and password pairs to test at once. Because the passwords are stored in plaintext, there is no encryption to break, meaning automated tools can immediately try each pair against login pages. What Was Exposed: the file includes email addresses used to sign into accounts, plaintext passwords tied to each address, and URLs showing where the credentials were used. Why This Matters: with close to 182,000 records in this single file, the odds that any one person reused their password elsewhere are high. Anyone who did is at risk of credential stuffing, where attackers automatically test the same email and password combination across other websites, which can lead to account takeover, identity theft, or financial fraud. How a Combolist Like This Gets Made: combolists like this one are typically compiled by combining email and password pairs from earlier data breaches, phishing campaigns, or malware-infected devices into a single organized file, then shared or sold through channels like Telegram. Check If You Are Affected: if you want to know whether your email address appears in the Denmark 9 combolist or any other leak, HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records, so you can find out quickly and change any passwords that need it.