The Nebula Cloud Logs Breach Happened in 2025. The Data Just Went Public.

HEROIC Analysts Confirm: Nebula Cloud Logs NebulaLogsCloud Stealer Data Now Circulating

HEROIC's threat intelligence team has identified a verified stealer log dataset known as Nebula Cloud Logs NebulaLogsCloud 367count, uploaded to Telegram in July 2025. The dataset contains 24,934 records harvested by malware running silently on infected endpoints. The exposed information includes email addresses, plaintext passwords, and URLs -- the exact combination attackers need to execute targeted account takeover campaigns.

Why This Is Dangerous

This breach is not a distant corporate hack -- it is credential data pulled directly from real user devices. With plaintext passwords and associated email addresses in hand, attackers can immediately attempt to log into email accounts, cloud services, banking portals, and social media platforms. Because many users reuse passwords, a single compromised credential can unlock dozens of accounts. The URLs included in this dataset also reveal which services the victim was actively using, helping attackers prioritize their attacks.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (indicating active services and accounts)

Why This Matters

Stealer log data is particularly dangerous because it bypasses hashed password protections entirely -- the passwords were captured before any encryption could protect them. This data enables credential stuffing attacks across thousands of sites, direct account takeover of email and cloud services, identity theft when combined with other leaked datasets, and financial fraud if banking or payment service credentials are included. Once this data circulates on Telegram channels, it spreads rapidly to multiple threat actors simultaneously.

How Stealer Logs Work

Stealer logs are generated by a category of malware called information stealers. These programs infect a device -- often through phishing emails, malicious downloads, or compromised software -- and silently harvest saved browser credentials, session cookies, autofill data, and active login tokens. The malware transmits this data to a command-and-control server, where it is packaged into log files and sold or freely shared on dark web forums and Telegram channels. Unlike database breaches, stealer logs capture credentials at the moment of use, meaning the passwords are always current and in plaintext.

Check If You Are Affected

HEROIC's free breach scanner checks your email against more than 400 billion exposed records, including stealer log datasets like this one. If your credentials appeared in the Nebula Cloud Logs NebulaLogsCloud breach or any other exposure, you will know immediately -- and you can take action before attackers do.

Search your email now at HEROIC's free breach scanner and find out if your data is already in criminal hands.