How the SkyCloudULP Combolist Led to 5.3 Million Stolen Logins

HEROIC analysts traced a combolist called "SkyULP Private by SkyCloudULP" to a Telegram upload on October 17, 2025. The file contained 5,352,385 records, each combining an email address, a plaintext password, and the URL of the login page the pair was used on.

How the SkyCloudULP Combolist Led to 5.3 Million Stolen Logins

Files like this one are not created in a single moment. They are assembled over time as credentials from separate breaches, stealer infections, and phishing pages get pulled together, checked, and formatted into one standardized list. Once the SkyCloudULP file reached 5.3 million working entries, it was packaged up and shared through a private Telegram channel, putting millions of login pairs into circulation at once.

What Was Exposed in the SkyCloudULP File

• Email addresses used as account usernames
• Plaintext passwords paired directly with each email
• URLs identifying which site or service each login belongs to

Why This Matters for the 5.3 Million People in This File

Because each entry already links a working email, password, and destination site, this combolist is built for credential stuffing. Automated bots can run these exact combinations against banking, email, and shopping sites without any extra effort. If a password in this file has been reused anywhere else, that account becomes exposed too, opening the door to account takeover, financial fraud, and identity theft.

How a Combolist Like This Gets Built

Combolists are compiled from many sources rather than one breach. Criminals combine leaked credentials from older data breaches, stealer logs, and phishing campaigns, then standardize the format into one large file of email, password, and site combinations. That file is then sold or shared through private Telegram groups and dark web forums, exactly where this one was found.

Check If You Are in the SkyCloudULP Leak

With more than 5.3 million records in this file, there is a real chance your email address is one of them, especially if you have reused a password across different accounts. HEROIC's free breach scanner checks your email against a database of over 400 billion leaked records, including this combolist, so you can see your exposure and change any affected passwords before someone else uses them.