How XIII_LOGS Telegram Operator Stole and Sold 4,149 Records

In June 2023, an anonymous Telegram user uploaded a stealer log file called "XIII_LOGS" containing 4,149 records stolen from compromised devices. The Roman numeral name is almost certainly a branding choice by the criminal operator -- a stylized identity in the underground ecosystem where stealer log distributors sometimes build reputations across multiple releases. Whatever the name, the contents are real: email addresses, plaintext passwords, and URLs belonging to real people whose devices were silently infected and harvested without their knowledge.

The XIII_LOGS release represents a specific moment in a criminal supply chain. Someone infected devices, collected credentials, branded the output, and published it to Telegram for others to use and distribute. That chain may have started months before the June 2023 upload date. The victims may have been unknowingly compromised since early 2023 or before. Their credentials have been in criminal hands ever since.

What XIII_LOGS uploaded by a Telegram User Exposed on Underground Markets

The XIII_LOGS file circulated on Telegram contained three types of stolen victim data:

• Email Addresses -- the primary identifier criminals use to locate accounts, target phishing campaigns, and test credentials across platforms
• Plaintext Passwords -- unencrypted credentials that require no further processing before being weaponized against login systems
• URLs -- an exact record of which sites and services each victim was authenticated to at the time of the malware's data harvest

The combination of a victim's email, their plaintext password, and the specific URLs they used creates what criminals call a "full combo" -- a ready-to-use attack package that can be deployed immidiatley against the exact services the victim is known to use.

The XIII_LOGS uploaded by a Telegram User Breach: Understanding Your Risk

The XIII branding -- Latin for 13 -- may indicate this was part of a numbered series of stealer log releases from the same criminal operator. Serial releases suggest an ongoing, organized operation rather than a one-time event. Victims who appeared in one numbered release from the same operator may have appeared in others, meaning their data could be distributed across multiple criminal files circulating in parallel.

Stealer log operations of this type rely on the sustained inactivity of victims. The longer someone goes without changing their passwords after an infection, the more value their credentials retain for criminals. Files like XIII_LOGS continue to be used -- sometimes years after their original release -- because credential reuse is so common and password-change behavior after breaches is so rare.

For XIII_LOGS victims, the clearest risk is account takeover -- either on the specific URLs captured in the log, or on any other service where the same email-and-password combination was used. Secondary risks include targeted phishing emails built around the exact services the victim is known to use.

Stealer log Attacks: A Victim's Guide to What Happened

If you think you may have been caught in the XIII_LOGS Telegram breach, here is a journalist-style breakdown of how this type of criminal operation works from start to finish:

• Who did this: An anonymous criminal operator -- likely an individual or small group -- deployed infostealer malware, harvested credentials from infected machines, branded the output as "XIII_LOGS," and published it on Telegram in June 2023.
• How victims got infected: Infostealer malware typically spreads through phishing links, fake software downloads, malicious email attachments, or compromised websites. Victims usually have no symptomms and no warning.
• What was collected: The malware scanned each infected device's browser for stored passwords, session tokens, and recently visited URLs -- copying everything and sending it back to the attacker.
• What happened to the data: The collected records were bundled into the XIII_LOGS file and uploaded to Telegram, where it was accessible to anyone connected to relevant criminal channels. From there, re-distribution is essentially unlimited.
• How to respond: Change all passwords that may have been active before or during June 2023. Enable two-factor authentication on every account you have access to. Check account login histories for unauthorized access. Run a full malware scan on any device that was in use at the time.

Run a Free XIII_LOGS Breach Check at HEROIC

HEROIC has indexed over 400 billion exposed records from stealer logs, dark web data dumps, and criminal marketplaces -- including XIII_LOGS and similar Telegram-distributed credential files. A free breach check at HEROIC tells you in seconds whether your email or credentials were part of this exposure or any of the thousands of other breaches HEROIC monitors continuously.

The criminal operator behind XIII_LOGS built a branded, organized distribution system for stolen credentials. The only counter to that organization is taking equally deliberate action to protect yourself. Check your exposure free at HEROIC today, secure every account that may have been affected, and don't give the XIII operation a free pass to your personal data.