SunCloudNew 1243 Leak: Check If Your Password Is Among 30,484

HEROIC analysts identified a large stealer log release named SunCloudNew 1243, part of a batch labeled 5400 LogsFile.part1, uploaded to Telegram in late June 2026. This single part alone contains 30,484 records taken from infected devices, each one pairing an email address with a plaintext password and the URL of the account it unlocks.

Why the SunCloudNew 1243 Leak Is Especially Serious

With over 30,000 records in just one part of this release, the scale here is far bigger than most stealer logs HEROIC tracks. Every password inside is stored in plain text, meaning an attacker can open the file and instantly see working logins without cracking a single one.

What Was Found in the SunCloudNew 1243 File

• Email addresses tied to real people
• Plaintext passwords with no encryption at all
• URLs showing exactly which site or app each login belongs to

Why a Leak of This Size Puts So Many Accounts at Risk

When a leak reaches tens of thousands of records, the odds that your information ends up in the hands of a scammer go up significantly. Attackers run these credentials through automated tools that test them against banking, email, and shopping platforms, a tactic called credential stuffing. A single match can lead to account takeover, identity theft, or financial fraud befor the victim even realizes anything is wrong.

How a File This Large Gets Built

Stealer logs of this size are usually the combined output of infostealer malware infecting thousands of devices over time. Each infected machine hands over its saved browser passwords, cookies, and autofill data, which the attacker collects and merges into a single massive file. That file is then split into parts, like this 5400 LogsFile.part1, and released peice by peice on Telegram so buyers can access smaller chunks.

Check Now If You Are Among the 30,484 Exposed

With a leak this size, checking your exposure only takes a few seconds. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, including large stealer logs like SunCloudNew 1243, and shows you imediately if you were affected. If your email turns up, change that password right away and enable two-factor authentication wherever it's offered.