The Logs_21 December Breach Put 20,954 Stolen Email and Password Pairs Online

HEROIC analysts found a stealer log file posted to a public Telegram channel in December 2024, identified as "Logs_21 December." The upload appeared on December 21st, 2024 and contained 20,954 records pulled from infected devices. The data included email adresses, plaintext passwords, and service URLs, all captured in real time by malware running on victims' computers. This was not old recycled data. These were live credentials at the moment they were stolen.

Why This Is Dangerous

Stealer logs represent some of the most actionable stolen data available to criminals. The malware behind this log did not guess passwords or crack hashes. It recorded them as users typed or autofilled them into login forms. That makes every one of the 20,954 records in this file a confirmed, working credential. Attackers who download this file from Telegram can immedietly begin testing those logins against popular services, corporate portals, banking platforms, and any other site that uses email-based login. There is no additional decryption or cracking needed.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (service endpoints and API hosts)

Why This Matters

When email and plaintext password pairs are leaked together, credential stuffing becomes trivial. Automated attack tools can run through thousands of login attempts per minute, testing each stolen pair against Gmail, Outlook, PayPal, banking apps, and work systems. Password reuse is extremely common, which means a single compromised credential can give an attacker acces to multiple accounts owned by the same person. The end result is account takeover, financial theft, and identity fraud, often occuring before the victim notices anything unusual.

How Stealer Log Breaches Work

Stealer malware typically gets onto a device through a phishing email, a fake software download, or a malicious browser extension. Once installed, it operates silently and collects saved passwords from web browsers, captures autofill data from login forms, records session cookies that keep users logged in, and harvests API credentials from desktop applications. Everything is bundled into a log file and sent to the attacker's server. That log is then uploaded to Telegram or sold on underground markets, where criminals who had no part in the original infection can purchase it and start abusing the credentials immediately.

Check If You Are Affected

HEROIC has indexed over 400 billion leaked records, including stealer log files like Logs_21 December. You can run a free search using your email address or password right now to find out if your credentials are in this file or any other known breach in our database. Catching a breach early gives you time to change your passwords and enable two-factor authentication before attackers lock you out of your own accounts. Visit HEROIC and run your free breach check today.