If You Reuse Passwords, the HESOYAM CLOUD Leak Should Worry You

In July 2025, security analysts identified a stealer log file that had been posted to a public Telegram channel by an anonymous user. The file, now tracked as the HESOYAM CLOUD leak, contained 20,759 records lifted from compromised devices. Each record included an email address, a plaintext password, and a URL showing which site or API the victim had logged into. The passwords were stored in plain text with no encryption of any kind, so anyone who found the file had immediate, no-effort access to thousands of real user credentials.

Why This Is Dangerous

Attackers do not need to be sophistocated to exploit a dump like this. They load the email and password pairs into freely available credential stuffing tools and run them against popular platforms like Gmail, PayPal, online banking portals, and corporate logins. Many of those login attempts succeed because people tend to reuse the same passwords across multiple accounts. The URLs in this dump also tell attackers exactly which services victims were actively using, letting them prioritise the highest value targets first and maximise the damage from each stolen credential.

What Was Exposed in the HESOYAM CLOUD Dump

• Email addresses
• Plaintext passwords (completely unencrypted)
• URLs, including API host endpoints

Why This Matters

If you reuse even one password across two accounts, a stealer log like this can cascade into a serious problem. Credential stuffing attacks use your email and password to try to log into every major platform automaticaly. Once an attacker gets into your email, they can reset passwords on your bank, your streaming services, and your workplace tools. Account takeover, fraudulant transactions, and identity theft are all common outcomes. The victims often do not find out until the damage is already done and recovery becomes a weeks-long ordeal.

How Stealer Log Breaches Work

A stealer log is the output of infostealer malware, a program that runs secretly on a victim's device after arriving via a phishing link, a fake app, or a compromised download. The malware quietly collects passwords saved in browsers, captures credentials as they are typed, and records the websites the user visits. Everything gets packaged up and sent to the attacker's server. The attacker then compiles this into a single log file and posts it to Telegram or sells it on underground forums. Other criminals then use these logs to launch follow-on attacks. The whole chain from infection to weaponised credential dump can happen within a single day.

Check If You Are Affected

HEROIC's free breach scanner checks your email address against more than 400 billion compromised records, including the HESOYAM CLOUD dump. You do not need to sign up or pay anything. Search your email now to find out in seconds whether your credentials were caught in this leak, then change any passwords that may have been exposed before an attacker gets the chance to use them.