Inside Logs_25 February: 16,791 Passwords Harvested

HEROIC identified a stealer log file labeled Logs_25 February that was uploaded to Telegram in February 2024. The collection contains 16,791 credential records extracted from infected endpoints by infostealer malware, providing attackers with direct access to victims' online accounts across numerous platforms and services.

Plaintext Passwords Eliminate Every Barrier

Each password in this dump was captured in its original plaintext form as it was entered or stored in the victim's browser. No hashing algorithm protects these credentials, and no brute-force effort is required to decode them. Attackers can use these passwords immediately and at scale, making this one of the most exploitable forms of credential data available.

What Was Exposed

• Email Addresses — the primary key linking victims to their accounts, also exploitable for social engineering and phishing
• Plaintext Passwords — raw, unencrypted credentials ready for direct use in login attempts
• URLs — specific endpoints revealing which websites and services each victim was using when their credentials were stolen

Why Credential Stuffing Works So Well

Automated credential stuffing attacks are devastatingly effective because they exploit a simple human tendency: password reuse. When attackers load 16,791 email-password pairs into stuffing tools, they can test each combination against hundreds of websites in parallel. Even a small success rate across banking, email, retail, and enterprise platforms yields a significant number of fully compromised accounts, often before victims realize anything has happened.

A Technical Look at Stealer Log Operations

The Logs_25 February dataset was generated by infostealer malware operating on compromised machines. These programs typically hook into browser processes to intercept credential storage, extract cookies and session tokens from local databases, and scrape autofill fields. The malware often evades detection by mimicking legitimate system processes. Once the data is collected, it is structured into log files organized by domain, credential pair, and associated metadata, then distributed through Telegram networks and dark web forums.

Check If Your Credentials Were Exposed

HEROIC's breach intelligence platform indexes over 400 billion records from data breaches, stealer logs, and credential dumps worldwide. Search for your email address or password to determine if you were affected by the Logs_25 February leak or any other known breach, and act quickly to secure exposed accounts.