BlackCloud October Leak Exposes 17,377 Plaintext Passwords

17,377 records. That's the size of a second BlackCloud stealer log, this one dated to late October 2025 and uploaded by the same kind of Telegram source as its larger sibling. It's smaller than some of the dumps making the rounds right now, but the contents inside are just as usable to whoever finds them first.

Why This Is Dangerous

What makes stealer logs so troubling isn't just the number of records, it's where the data came from. This information was pulled directly off infected machines by malware running quietly in the background, wich means the passwords inside were still active and in use at the time of theft. Nothing here needed to be cracked or guessed since the passwords sit in plaintext form, ready for anyone who opens the file.

What Was Exposed

Inside this particular log, researchers catalogued:

• Email addresses linked to real accounts
• Plaintext passwords stored without any encryption
• URLs identifying the exact sites tied to each login
• 17,377 records total in this dataset

Why This Matters

Even a smaller leak like this one can cause outsized damage if the wrong account gets picked out of the pile. A single set of working credentials can open the door to email, financial services, or workplace tools, especially if that password shows up again on another site. People underestimate how often a password gets reused, and that habit is exactly what makes leaks like this one so profitable for attackers.

How Stealer Log Works

Infostealer malware typically sneaks onto a computer through pirated software, a fake browser update, or a booby-trapped file attachment. Once installed, it digs through saved browser data, pulling out login credentials, session cookies, and autofill fields, then bundles everything into a log and ships it back to the attacker automatically. From there, logs like this one get traded, sold, or dumped for free on channels such as Telegram, often within days of being collected.

Check If You Are Affected

Don't leave it to chance. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, so you can imediately check whether your email address turns up in this BlackCloud log or any other breach on record. It takes seconds and could save you a serious headache down the road.