How the segacloud 1107 ULP 1 List Leaked 3,546,211 Combos

On 24-Sep-2024, a file with the unassuming name "segacloud 1107 ULP 1" appeared on Telegram, and inside it were 3,546,211 separate email and password combinations. Unlike a single company getting hacked, this kind of file, known as a combolist, is built by combining login data pulled from many older breaches into one massive, searchable list.

Why This Is Dangerous

A combolist this size turns old, half forgotten breaches into a fresh weapon. Even if the original leaks happened years ago, bundling millions of credentials together makes it easy for an attacker to run automated login attempts across huge numbers of websites in a single afternoon.

What Was Exposed

• Millions of email addresses paired with corresponding passwords
• Plaintext password values with no protection applied
• URLs identifying which platforms the credentials were tied to

Why This Matters

3.5 million records isn't a small local incident, it's the kind of scale that fuels large scale credential stuffing attacks across the whole internet. If your email has ever appeared in an older breach, there's a good chance it got folded into a combolist exactly like this one, though nothing is garunteed about how criminals build these lists.

How Combolists Get Built

Combolists are usually assembled by criminals who take data from several older, sometimes years old breaches and merge them into one cleaned up file, removing duplicates and formatting everything the same way. This kind of merging has occured for years across underground marketplaces. The finished product gets fed straight into credential stuffing tools that automatically try each pair on hundreds of login pages at once, hoping a small percentage still work.

Check If You Are Affected

With over 400 billion leaked records now tracked across breaches, stealer logs, and combolists, there's a real chance you're in one of them without knowing it. HEROIC's free scanner checks instantly and shows you exactly which passwords need to change before this list gets used against you.