OceanCloud Stealer Log Leak: 4.3 Million Passwords Exposed

HEROIC analysts uncovered a massive stealer log posted to a Telegram channel in February 2026, labeled "UP_OceanCloud ULP Prvte Part 4." Unlike the small personal dumps that circulate daily, this file contained 4,340,685 records, each one pairing a stolen email address with its plaintext password and the exact web address where that login was captured.

Why The OceanCloud Stealer Log Is Dangerous

A file of this size turns a single infection campaign into a factory of ready to use logins. Every record was harvested straight from an infected device, meaning the passwords are current, not years old copies from a forgotten breach.

Because the matching website URL rides along with each email and password, attackers can automate logins at scale instead of guessing where a password might work. That is what makes a stealer log of over four million entries so much more dangerous then a simple password list.

What Was Exposed In The OceanCloud Log

• Email addresses
• Plaintext passwords
• URLs tied to each set of credentials

Why 4.3 Million Exposed Logins Matter

At this scale, criminals do not need to target anyone specific. Automated scripts run credential stuffing attacks across thousands of sites at once, testing each stolen email and password combination until one works. Reused passwords are the biggest risk here, a single Hotmail or Gmail login shared across banking and shopping accounts can open the door to full account takeover.

Once inside, attackers pivot quickly into identity theft and financial fraud, draining accounts, opening new lines of credit, or selling verified working logins to other criminals in bulk. Victims often don't even realize the takeover has occured until statements arrive with unfamiliar charges.

How A Stealer Log This Large Gets Built

Stealer malware spreads through pirated software, fake game cheats, and malicious email attachments. Once it lands on a device, it silently harvests everything saved in the browser, passwords, autofill fields, and session cookies, then bundles it into a log file that gets uploaded to the attacker's server.

Logs from thousands of infected machines are often merged together into one giant file like this one before being shared or resold. It only takes one careless download to end up as a single line in a file with millions of other victims.

Check If You Are Part Of The 4.3 Million

HEROIC's free breach scanner searches a database of more than 400 billion exposed records, including this OceanCloud stealer log, in seconds. Enter your email address to find out if your credentials were caught up in this leak and get guidance on locking down your accounts right away.