The CosmoLogs Stealer Log Exposed 11,573 US Accounts on Telegram

In July 2025, a Telegram user uploaded a stealer log file identified as CosmoLogs, exposing 11,573 records containing email addresses, plaintext passwords, and URL endpoint data. The breach is catalogued as affecting United States-based accounts -- making it directly relevent to American internet users who may have had their devices compromised by infostealer malware in the months leading up to the July 2025 disclosure. If you are in the US and have not checked your credentials recently, this is the breach that should prompt you to act.

Why This Is Dangerous

US-based credentials are among the most targeted in the world because American users tend to hold accounts with high financial value -- banking apps, investment platforms, e-commerce accounts with stored payment methods, and subscription services. When a stealer log targeting US accounts surfaces on Telegram, it is quickly acquired by criminal networks who specialize in monetizing American financial credentials. The combination of plaintext passwords and email addresses in the CosmoLogs dump means there is no technical barrier between the attacker and immediate account access.

What Was Exposed

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

Why This Matters

The 11,573 records in the CosmoLogs breach represent individuals across the United States whose devices were silently infected with infostealer malware. Many victims will have no idea their credentials were harvested. The URL data included in this log is particularly valuable to attackers -- it reveals exactly which financial institutions, shopping platforms, and email providers each victim uses, allowing criminals to prioritize targets with the highest potential payout. US consumers face a specific risk because their accounts often tie together banking, healthcare, and goverment services through shared email credentials.

How Stealer Log Breaches Work

Infostealer malware infects US users through the same vectors seen globally -- phishing emails, malicious software downloads, and compromised browser extensions -- but criminal groups specifically seek out logs with US account concentrations because of the higher monetization potential. Once the malware is on a device, it extracts all stored passwords and browser-saved credentials, packages them into a log file, and the file is sold or shared through Telegram. The CosmoLogs file followed this exact path before being identified and added to breach monitoring databases.

Check If You Are Affected

HEROIC's free scanner searches more than 400 billion compromised records, including US-focused stealer logs like CosmoLogs. Enter your email address to see immediatly whether your credentials appear in this or any other known data breach. If you are a US-based user and your email shows up, prioritize changing passwords for your bank, email provider, and any account linked to a payment method first. Do not wait -- stealer log data moves fast once it is in circulation on Telegram.