18,212 Plaintext Passwords From WATERCLOUD_INFO Just Surfaced on Telegram

On June 17, 2025, an unidentified Telegram user uploaded 326 files belonging to a dataset labeled WATERCLOUD_INFO. Inside those files were 18,212 records harvested by a stealer — a type of malware designed to silently pull credentials off infected machines. The data included plaintext passwords, email addresses, and associated URLs, giving anyone who downloaded the archive an immediate roadmap for account takeover. Stealer logs of this kind typically circulate within hours of being posted, and this one was no exception.

Why This Is Dangerous

Stealer logs are not theoretical threats. Unlike breached databases that might store hashed passwords, stealer logs capture credentials at the moment they are typed or autofilled — meaning the passwords are stored in plain text with zero encryption. When 18,212 plaintext password pairs hit Telegram, any subscriber to that channel can begin credential stuffing campaigns within minutes. The presence of URLs in the dataset makes this worse: attackers know exactly which sites and services the victems were logged into, removing any guesswork from targeting.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• Associated URLs (service endpoints and web apps accessed by infected machines)

Why This Matters

Plaintext passwords are the highest-value commodity in the credential market. Once an attacker has your email and password in cleartext, they do not need to crack anything — they simply log in. If you reuse passwords across services, a single stealer infection can cascade into dozens of compromised accounts. The 326 files in this dump also suggest the infection spanned multiple machines or sessions, meaning this was not an isolated incident. The scope of the WATERCLOUD_INFO dataset indicates a coordinated harvesting operation, not opportunistic malware on a single device. Security researchers at Mandiant and Cybersixgill have both documented the rapid weaponization of Telegram-distributed stealer logs, with credential stuffing campaigns launching within hours of a new dump appearing.

How Stealer Log Breaches Work

Stealer malware typically arrives through phishing emails, fake software downloads, or drive-by browser exploits. Once installed, it runs silently in the background, harvesting saved browser passwords, session cookies, and autofill data. The malware then exfiltrates this data to a command-and-control server or directly to a Telegram bot. The attacker compiles the results into structured log files — exactly like the 326 files seen in this WATERCLOUD_INFO dump — and either sells them on dark web forums or distributes them freely to build reputation within criminal communities. The entyre process from infection to Telegram upload can take less than 24 hours. Victims typically have no idea their credentials were captured until they begin receiving unauthorized login alerts or notice accounts have been taken over.

Check If You Are Affected

HEROIC's free scanner checks your email address against more than 400 billion exposed records, including stealer log datasets like WATERCLOUD_INFO. If your credentials appeared in this dump or any other known breach, the scanner will flag it immediately. Do not wait for a bank alert or a locked account to find out — run the scan now, change any reused passwords, and enable multi-factor authentication on every account that supports it. Stealer log victims who act within the first 48 hours significantly reduce their risk of account takeover.