Inside CrystalCloudLogs: How Malware Stole 16,348 Passwords in 2025

In July 2025, a Telegram user distributed a stealer log dataset now tracked as CrystalCloudLogs 381count, exposing 16,348 records including plaintext passwords, email addresses, and URLs. This is not a breach of a single company's database. It is the direct output of infostealer malware running silently on real people's computers, capturing credentials as they were typed and used. HEROIC analysts confirmed the dataset and found the records contain everything an attacker needs to immediately begin testing credentials against live services -- no cracking, no preparation, no technical skill required.

Why This Is Dangerous

Unlike hashed passwords that require cracking, the CrystalCloudLogs 381count dataset contains plaintext passwords ready for immediate use. Attackers who obtain this file can paste credentials directly into login forms across banking sites, email providers, and corporate portals. The URLs included in the dataset make targeting even easier -- they show exactly where each victim has an active account, removing any guesswork. This combination of email, plaintext password, and URL is considered one of the most exploitable data types in the breach ecosystem, and it is why stealer log markets on Telegram command higher prices than traditional database dumps.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (websites accessed or stored by infected devices)

Why This Matters

Stealer log victims face a seperate and more urgent threat than victims of typical database breaches. Because credentials are captured in real time from the device, they are almost certainly still active at the moment of theft. This creates immediate risk of credential stuffing across every platform where the same password was reused, account takeover of email, banking, and social media accounts, and identity theft using personal details discovered after initial account access. If you recieve a notification that your credentials appeared in this dataset, treat it as urgent -- change affected passwords immediately and review recent account activity for signs of unauthorized access. Victims frequently don't realise the breach occured until they are locked out of their own accounts.

How Stealer Log Malware Works

Infostealer malware typically arrives through phishing emails, trojanized software downloads, or malicious browser extensions. Once it runs on a device, it scans for saved passwords in browsers like Chrome and Firefox, copies active session cookies, and records keystrokes. The harvested data is bundled into a log file and automatically sent to the attacker via Telegram or a remote server. The victim often has no idea anything occured. Logs like CrystalCloudLogs 381count are then compiled, sorted, and distributed in bulk across dark web forums and Telegram channels, where they are sold to other criminals or posted freely to build reputation within the cybercrime community. The entire process from infection to distribution can happen within hours.

Check If You Are Affected

HEROIC's free breach scanner checks your email address against more than 400 billion compromised records, including stealer logs like CrystalCloudLogs 381count. If your credentials appear in this dataset or any other known breach, HEROIC will identify it so you can take action before attackers do.

Run a free scan at HEROIC.com right now -- no account or payment required. Find out in seconds whether your email and passwords are already circulating on the dark web.