The StarX_ULP Dec 24 Combolist Means Someone Could Be in Your Inbox

In December 2025, HEROIC analysts identified a combolist file circulating on Telegram, uploaded under the label StarX_ULP_24.12.2025_Part_2. The file contained 15,470,037 records pairing email addresses, plaintext passwords, and associated URLs, credentials pulled from earlier breaches and compiled into one list for cybercriminals to use. Why this is dangerous: because the passwords in this file are stored in plaintext, anyone who obtains it can immediately try each email and password pair against other accounts, with no cracking or decryption needed. The URLs included with each record often point to the exact site or service the credentials belong to, meaning an attacker does not need to guess where to try a stolen login, they already know. What was exposed: email addresses, plaintext passwords, and associated URLs or login links. Why this matters: combolists like this one power credential stuffing attacks, where automated scripts run stolen email and password pairs against banking sites, email providers, and social media platforms in bulk. If you reuse a password anywhere, a single record in this file could give an attacker a working key to your inbox, your bank account, or your social media, leading to account takeover, identity theft, or financial fraud. How combolists work: a combolist is a compiled text file that pairs email addresses or usernames with passwords, gathered from multiple earlier breaches or malware infections and merged into one master list. Criminals build and trade these lists on Telegram channels and dark web forums because it saves them the work of hunting down credentials one breach at a time, and once a combolist becomes public it can be copied and reused indefinitely. Check if you are affected: with over 400 billion records in its database, HEROIC's free breach scanner can tell you in seconds whether your email address appears in this leak or any other breach on record. If it does, HEROIC will show you exactly what data was exposed so you can change passwords and secure your accounts before someone else uses them against you.