US Accounts Made Up Most of the Cloudlogss350 Leak of 1.55M Logs

Back in February 2023, a Telegram user uploaded a file called cloudlogss350 that turned out to hold 1,550,355 stolen records, and a large share of them were tied to accounts based in the United States. The file sat quietly for a while before it started circulating more widely in dark web channels, and by the time anyone flagged it, the data had likely already been copied and reused more times than anyone could track.

Why This Is Dangerous

This wasn't a breach of one company's database. It was a stealer log, meaning malware sitting on infected computers quietly recorded everything typed into browsers, saved passwords, and visited URLs, then shipped it all back to whoever controlled the malware. That makes it wich harder to trace to a single root cause, and it means victims often have no idea their machine was ever compromised in the first place.

What Was Exposed

• Email addresses tied to more than 1.5 million accounts
• Plaintext passwords, meaning no hashing or encryption protected them
• URLs showing exactly which sites and services each password unlocked

Why This Matters

When a password sits in plaintext, anyone who gets the file can use it right away, no cracking neccessary. Pair that with the matching URL and email address, and an attacker has a ready made login kit for whatever account it belonged to, whether that's a bank, an email inbox, or a work account.

How Stealer Log Breaches Work

Stealer logs come from malware that infects a device, often through a fake download, cracked software, or a malicious attachment. Once installed, it scrapes saved credentials from browsers, grabs autofill data, and sometimes even captures screenshots. All of it gets bundled into a log file and uploaded somewhere the attacker can recieve it, which is exactly what happened here before it landed on Telegram.

Check If You Are Affected

If you think your information might be sitting in a file like this, you don't have to guess. HEROIC's free scanner checks your email against a database of more than 400 billion compromised records, including stealer log dumps like this one, so you can find out in seconds whether it's time to change a password.