WATERCLOUDz Stealer Log: 9,769 Plaintext Credentials on Telegram

HEROIC researchers documented the WATERCLOUDz 790 PIECE stealer log, a dataset distributed on Telegram on 04 July 2023 that contained 9,769 compromised records from US-based endpoints. The name "790 PIECE" appears to reference a package or lot designation used by the operator, and the July 2023 date stamps it as part of a wave of stealer log releases that flooded Telegram channels in mid-2023. Each record in the file pairs an email address with a plaintext password and the source URL, giving attackers everything they need to begin credential stuffing immediately.

Nearly 10,000 complete login triplets represent a meaningful threat to anyone whose device was compromised by the underlying malware. The plaintext nature of the passwords is paticularly damaging -- there is no encryption to slow down an attacker, and the URL data allows highly targeted exploitation against specific services rather than broad guesswork. Any account where the same password was reused is also at risk, multiplying the real-world impact well beyond the 9,769 raw records.

The WATERCLOUDz 790 PIECE - 04.07.2023 uploaded by a Telegram User Breach: Leaked Data Summary

• Records exposed: 9,769
• Date of breach: 04-Jul-2023
• Email Addresses: Real user identities linked to active accounts
• Plaintext Passwords: Unencrypted credentials ready for immediate exploitation
• URLs: Specific web adresses identifying exactly where credentials were captured
• Country of origin: United States
• Breach category: Stealer log (WATERCLOUDz) distributed via Telegram

Why WATERCLOUDz 790 PIECE - 04.07.2023 uploaded by a Telegram User Credential Data Is Valuable to Attackers

The WATERCLOUDz dataset's value lies in its completeness and immediacy. Criminal actors who obtain this log can feed its email-password-URL triplets directly into automated credential stuffing frameworks, targeting the exact platforms victims were using when their devices were infected. Banking portals, corporate remote access tools, e-commerce accounts, and email providers are all viable targets. Fraud operations also use stealer log data to take over accounts and monetize them -- through unauthorized purchases using stored payment methods, or reselling verified account access on dark web markets. With nearly 10,000 records, this dataset is large enough to generate significant returns for any attacker running an automated campaign.

What Is a Stealer log and How Does It Work?

A stealer log is created when infostealer malware runs on a victim's device, silently extracting browser-saved passwords, session cookies, and autofill data. The malware packages this harvested information into a structured log file and transmits it to the operator's server or Telegram channel. "WATERCLOUDz" appears to be the branding used by a specific operator or distribution network, with "790 PIECE" indicating a specific batch size or collection lot. Victims typically experiense no visible symptoms while the malware is active, and the first sign of compromise is often an unexplained account login or a password reset they didn't initiate.

Search for Your Data in the WATERCLOUDz 790 PIECE - 04.07.2023 uploaded by a Telegram User Breach

If you think your credentials may have been captured in the WATERCLOUDz stealer log, you can check right now. HEROIC monitors over 400 billion compromised records from stealer logs, dark web marketplaces, and breach databases worldwide. A free search will show you whether your email appeared in this breach or any other -- giving you the information you need to secure your accounts before attackers exploit your data.