Inside the POWERCLOUDMAIN Stealer Log: 15,963 Passwords

Inside the POWERCLOUDMAIN Stealer Log: 15,963 Passwords

HEROIC analysts identified a stealer log file named "Upload by LOGSYNC - POWERCLOUDMAIN-FREE-LOGS 28.05.2025" uploaded to a public Telegram channel, tied to a leak date of May 28, 2025. The file contains 15,963 records, each pairing an email address with a plaintext password and the URL of the account it was captured from. Opening a file like this shows exactly how information-stealing malware operates: row after row of real credentials, harvested quietly and packaged for anyone to download.

Why This Is Dangerous

Because the malware captured these credentials directly as victims typed them, the passwords sit in plaintext, with no hashing or encryption for an attacker to break through. That means every one of the 15,963 email and password pairs in this file works immediately, against the exact site it was taken from or any other account where the password might be reused.

What Was Exposed in the POWERCLOUDMAIN Leak

• Email addresses
• Plaintext passwords
• URLs of the accounts and services accessed

Why This Matters

A file of 15,963 working login pairs gives attackers everything they need to run credential stuffing attacks, automatically testing each combination against email providers, banks, and online retailers. Anyone in this leak who reused a password elsewhere is at risk of account takeover, which can quickly escalate into identity theft and financial fraud once an attacker controls a primary email account.

How Stealer Logs Work

A stealer log begins with a single infection: a cracked software download, a fake installer, or a phishing link that quietly installs information-stealing malware on a victim's device. From there, the malware copies every password saved in the browser along with the site it belongs to, then sends the results back to whoever controls it. Once enough data accumulates, the operator packages it into a log file, exactly like the one behind this leak, and shares it on a Telegram channel for anyone to download.

Check If You Are Affected

With 15,963 credentials from this leak already circulating, it is worth checking your own exposure now. HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records, so you can find out quickly and change any compromised passwords before someone else uses them.