Imagine a Stranger Logging In: Xavier_Ulp Leaks 245,719

Picture a stranger opening a spreadsheet with your email, your password, and the exact website it unlocks, then simply logging in as you. That is precisely what happened to 245,719 people whose credentials appeared in a stealer log uploaded to Telegram in late March 2026, tracked by HEROIC as part of the Xavier_Ulp series. The data was not stolen in a corporate hack. It was quietly siphoned off individual infected computers, one victim at a time.

Why This Is Dangerous

There is no lock left to pick here. The passwords sit in plain, readable text, matched exactly to the site each one opens. An attacker does not need to guess or crack anything, they just read the file and start logging in, often minutes after the upload goes live.

What Was Exposed

• Email addresses
• Plaintext passwords
• Login URLs matched to each credential

Why This Matters

Imagine an attacker testing your leaked password not just on the site it came from, but on your email, your bank, and your favorite shopping site too. That is credential stuffing in action, and it is the reason a single leaked password so often snowballs into account takeover, identity theft, and financial fraud.

How Stealer Logs Work

Stealer log malware sneaks onto a device disguised as a game cheat, cracked software, or a fake update, then quietly copies every saved password and autofill field from the browser. All of that gets bundled into one file and shared or sold on Telegram, exactly where this 245,719-record batch was found circulating.

Check If You Are Affected

Do not leave it to chance. HEROIC's free breach scanner checks your email against a database of over 400 billion leaked records, including stealer logs like this Xavier_Ulp file. Run a free scan now and find out before someone else does.