The XIII_LOGS Stealer Data Quietly Appeared on the Dark Web

In May 2023, a Telegram user uploaded a stealer log file called XIII_LOGS, and 6,063 people's credentials quietly became available to anyone on the dark web. There were no headlines, no breach notifications, and no warnings sent to victims. The stolen data -- including email addresses, plaintext passwords, and URLs -- has been circulating among cybercriminals ever since. If your email address appeared in this log, attackers may have already atempted to access your other accounts using the same password.

Why This Is Dangerous

Stealer log files are especially dangerous because the data inside them is lifted directly from infected devices -- not from a company's database. This means the credentials are current and accurate at the time of theft, with no encryption to crack. Plaintext passwords hand attackers immediate, unrestricted access to any service where the same password was used. Because breaches like XIII_LOGS receive little public attention, most victims remain unaware for months or even years.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (endpoint and API host data)

Why This Matters

The XIII_LOGS breach is a reminder that dark web data leaks do not always make the news -- but the damage is real regardless. Credential stuffing tools allow attackers to test stolen username and password combinations across thousands of websites in minutes. The 6,063 records in this breach may seem like a small number, but each one represents a real person whose accounts are now at risk. The fact that this breach occured in May 2023 means attackers have had signifcant time to exploit the data.

How Stealer Log Breaches Work

Stealer logs originate from information-stealing malware that infects victims' devices through phishing campaigns, fake software downloads, or malicious browser extensions. Once active, the malware harvests saved passwords, session tokens, and browser history before packaging the data into a log file. These logs are then shared or sold on Telegram channels and dark web forums -- sometimes for free, sometimes for a small fee. The XIII_LOGS file followed this exact pattern: collected, packaged, and uploaded to Telegram where it was accessible to thousands of bad actors.

Check If You Are Affected

HEROIC's free scanner searches across more than 400 billion leaked records -- including stealer logs like XIII_LOGS -- to tell you whether your email address has appeared in a known data breach. Enter your email now for an instant, free check. If your credentials are found in this breach or any other, you will be alerted immediately so you can change your passwords before attackers strike.