How Infostealer Malware Led to 2,246 Stolen Logins in EuropClaud

HEROIC analysts identified a stealer log named "EuropClaud" uploaded to Telegram on July 7, 2024. The file contains 2,246 records pulled directly from infected devices, including email addresses, plaintext passwords, and the URLs of the accounts those passwords unlock.

Why This Is Dangerous

Every record in EuropClaud came from a device that was already compromised by malware, which means the credentials are current and were captured at the moment they were used. Each password is paired with the exact site it belongs to, so an attacker can move straight from opening the file to attempting a login, with no cracking or guessing required.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the accounts and services those passwords unlock

Why This Matters

Once an attacker has a working login and the site it belongs to, they can attempt the same email and password combination on other platforms, a technique known as credential stuffing. Anyone who reused a password captured in this log faces a real risk of account takeover, financial fraud, or identity theft, even from a single infected device.

How This Stealer Log Was Created

Logs like EuropClaud come from infostealer malware, which typically infects a device through a fake download, a cracked piece of software, or a phishing link. Once installed, it quietly reads saved browser passwords, autofill data, and active login sessions, then packages everything into a file like this one. From there, the file is shared or sold on Telegram channels, which is where HEROIC analysts located it.

Check If You Are Affected

If you think your device or accounts could be connected to a log like this, it is worth checking now. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, including stealer logs like EuropClaud, so you can see what has been exposed and change any affected passwords before someone else uses them.