The NewWlfrCloud Breach Gave Hackers 41,058 Credentials Ready to Use

In July 2025, security analysts identified a stealer log file uploaded to a public Telegram channel and traced it back to the NewWlfrCloud dataset. The file contained 41,058 records pulled directly from infected endpoints, each one including an email address, a plaintext password, and a URL showing which service the victim had been logged into. Unlike a traditional database breach where a company gets hacked, this data was collected by malware running on individual peoples computers and then dumped into a single file shared publicly on Telegram. The credentials were not scrambled or hashed. They were ready to use the moment someone downloaded the file.

Why This Is Dangerous

With 41,058 working email and password combinations, an attacker can immediately begin what is known as credential stuffing. That means feeding the stolen logins into popular services like Gmail, PayPal, Amazon, and banking apps to see which ones work. The URLs inside this dataset narrow the work down even further, telling attackers exactly which accounts belong to which service. This is not a slow, methodical attack. Automated tools can run through tens of thousands of login attempts in just a few minutes. Users who reuse passwords across multiple accounts are at the highest risk of having multiple accounts compromised at once.

What Was Exposed in the NewWlfrCloud Stealer Log

• Email addresses
• Plaintext passwords (unencrypted and immediately usable)
• URLs revealing which websites and services victims were accessing
• Endpoint and API host informatoin

Why This Matters

Credential stuffing attacks powered by logs like this one are behind a huge number of account takeovers every year. Once an attacker gets into your email, they can trigger password resets on your other accounts and take control of your whole digital life. Stolen credentials are also sold to other criminals, used to commit identity theft, and leveraged to access workplace systems if a personal password happens to match an employees work login. The damage from a single leaked credential can go far beyond the one account it originally came from.

How Stealer Logs Work

Infostealer malware gets onto your device through phishing emails, fake software downloads, or malicious browser extensions. Once installed, it silently records your saved passwords, login sessions, and autofill data from your browser. It captures the URLs you visit and the credentials you use to log in. All of this is bundled into a log file that gets uploaded to a channel the attacker controls, often on Telegram. These logs are then shared freely or sold to other bad actors who use the credentials to attack accounts. The person whose data appears in the log often has no idea anything happened until they find themselves locked out of their own accounts.

Check If You Are Affected

HEROIC's free scanner searches more than 400 billion breached records, including stealer logs shared on Telegram like this one. If your email appears in a known data breach, you will find out right away so you can change your passwords and protect your accounts. Use HEROIC's free tool to check your exposure today.