192,463 Records Exposed in SunCloudNew Stealer Log Breach

HEROIC identified a stealer log collection known as SunCloudNew that surfaced on a Telegram channel in September 2025. The dataset contains 192,463 records harvested by infostealer malware from infected devices, putting the affected users at serious risk of account compromise.

The Danger of Plaintext Passwords in Stealer Logs

Every password in this breach was stored in plaintext, meaning attackers can use them immediately without any decryption. Unlike hashed passwords that require computational effort to crack, plaintext credentials are ready-made weapons for unauthorized access. A single exposed password can unlock not just the original account but any other service where the same password was reused.

What Was Exposed

• Email addresses used as account identifiers
• Plaintext passwords captured directly from user input
• URLs of websites and services the victims visited

How Credential Stuffing Turns One Breach Into Many

Cybercriminals take the email and password pairs from breaches like SunCloudNew and automatically test them across hundreds of popular websites. This technique, known as credential stuffing, exploits the widespread habit of password reuse. Even if the original compromised service seems unimportant, the same credentials may unlock banking portals, email accounts, or corporate systems.

Understanding Stealer Log Malware

Stealer logs originate from infostealer malware silently installed on a victim's device, often through malicious downloads, phishing links, or cracked software. Once active, the malware records every credential entered into web browsers and applications, then transmits the data to attacker-controlled servers. Collections like SunCloudNew are later packaged and distributed through dark web forums and Telegram channels for other criminals to exploit.

Check If Your Credentials Were Exposed

If you suspect your accounts may have been compromised in this or any other breach, take action now. HEROIC's breach scanner indexes over 400 billion records from known data breaches, stealer logs, and dark web leaks. Search your email address or domain to find out if your credentials have been exposed and take steps to secure your accounts before attackers do.