The Cloud T18 Leak Could Unlock Your Email, Bank, and Social Media

820,321 Records Exposed in the Cloud T18 Stealer Log

On April 4, 2026, HEROIC threat analysts discovered a stealer log named Cloud T18 that a Telegram user had uploaded for anyone to download. The file exposed 820,321 records made up of email addresses, plaintext passwords, and the URLs tied to each login. Because the data was pulled directly from infected devices, it reflects real, current usernames and passwords rather then an old, already-patched breach.

Why This Is Dangerous

Every credential in the Cloud T18 dump is stored in plaintext, which means an attacker can use it the moment they download the file, no cracking or guessing required. If any of these 820,321 people reused the same password on their email, banking, or social media accounts, that one leaked password could unlock several parts of their digital life at once.

What Was Exposed

• Email addresses connected to each compromised account
• Plaintext passwords for those accounts
• URLs identifying which website each login belongs to

Why This Matters

A single reused password is often all it takes for an attacker to chain their way from one account into several others. They start by testing the leaked email and password combo on popular banking and shopping sites through credential stuffing, then use a hijacked email account to reset passwords on social media, and from there the door is open to identity theft and financial fraud. The more accounts share a password, the further a single breach like this one can spread.

How the Cloud T18 Stealer Log Was Created

Stealer logs like Cloud T18 come from malware that infects a victim's computer, often hidden inside a cracked app, pirated download, or malicious link. Once installed, it quietly copies saved browser passwords, autofill entries, and the web addresses tied to each login, then sends everything back to the attacker. The stolen data is bundled into a single file, given a name like Cloud T18, and passed around dark web marketplaces and Telegram channels where other criminals pick it up for their own attacks.

Check If You Are Affected

If you are unsure wether your email or passwords appear in the Cloud T18 dump or any other breach, don't leave it to chance. HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records, so you can quickly see your exposure and secure your accounts before an attacker gets there first.