26,919 Passwords From the Monster Cloud Free 3 Dump Just Surfaced on the Dark Web

In October 2023, security analysts discovered a stealer log file being shared publicly on Telegram by a user going by the name "Monster Cloud Free 3." The dump, flagged on October 13th, 2023, contained 26,919 records pulled from compromised endpoints. Each record included an email address, a plaintext password, and a URL pointing to the service or application where those credentials were used. Unlike hacks that target a single company, stealer logs harvest data directly from infected devices, meaning the victims could span dozens of different platforms and services.

Why This Is Dangerous

Because every password in this dump is stored in plaintext, attackers do not need to crack anything. They can take a list of email and password pairs and immediately start trying them on popular services like Gmail, Amazon, banking apps, and social media. This technique is called credential stuffing, and it works especially well when people reuse the same password across multiple accounts. A single exposed password can open the door to severel accounts at once. Attackers can also sell these logs on underground forums, meaning the data gets recycled and used long after the original leak.

What Was Exposed in the Monster Cloud Free 3 Dump

• Email addresses
• Plaintext passwords (no encryption, no hashing)
• URLs of the services or websites where credentials were used

Why This Matters

Stealer logs like this one are particularly damaging because the credentials are ready to use the moment someone downloads the file. There is no additional effort required from an attacker. If your email and password appear in this dump, anyone who has the file can log into your accounts right now. This type of exposure leads directly to account takeover, identity theft, financial fraud, and in some cases, corporate network breaches if the compromised credentials belong to a work account. The fact that this data was shared on a public Telegram channel means it was accessable to thousands of people before it was even flagged by researchers.

How Stealer Log Breaches Work

A stealer log is created by infostealer malware, a type of malicious software that quietly runs on a victim's device after they click a bad link, download a fake file, or visit a compromised website. Once installed, the malware scans the device for saved passwords, browser cookies, and autofill data. It bundles everything into a log file and sends it back to the attacker. The attacker then sorts through the logs, sometimes sharing them publicly on Telegram or selling them on dark web markets. Because the malware works silently in the background, most victims have no idea their credentials have been stolen until they find out their accounts have been accessed without their permission.

Check If You Are Affected

HEROIC offers a free dark web scanner that searches over 400 billion records, including stealer logs like this one. Enter your email address to find out if your credentials appeared in the Monster Cloud Free 3 dump or any other known breach. Early detection gives you time to change your passwords before someone else uses them.