7,623 SunCloudPubl credentials compromised in November 2023 stealer log

HEROIC analysts identified a stealer log upload on November 6, 2023, when a Telegram user distributed a file labeled SunCloudPubl in a public channel. The log contained 7,623 records harvested from compromised endpoints, with each entry consisting of an email address, a plaintext password, and a URL pointing to the service or API host the victim had accessed. The data was presented in raw, unencrypted form -- the same format produced directly by credential-stealing malware. For every account in this dataset, the path to unauthorized access was immediate and required no technical expertise from the attacker.

Why This Is Dangerous

Plaintext passwords in a stealer log are ready to use the moment the file is downloaded. There is no hashing to crack, no encoding to reverse -- the credentials work directly. With 7,623 email-password pairs and the corresponding service URLs also present, attackers have both the keys and the map. They know which platforms each victim used and can attempt login immediately. United States-based accounts are a priority target because they are frequently connected to financial platforms, cloud services, and business applications that hold high-value data. The SunCloudPubl log removed every obstacle between a threat actor and thousands of live accounts.

What Was Exposed

• Email addresses
• Plaintext passwords (unencrypted and immediatley usable by attackers)
• URLs and API host endpoint addresses

Why This Matters

A stealer log of 7,623 records becomes a credential stuffing toolkit the moment it is shared. Automated attack tools can load these email-password pairs and test them against dozens of platforms within minutes. Because a large percentage of people reuse passwords across services, a single compromised credential can unlock email accounts, cloud storage, banking apps, and social media profiles. Once an attacker accesses an email inbox, they can reset passwords for every connected account, creating a cascade of takeovers. The API host URLs in this log add further risk: some entries may represent developer or business credentials that, if compromised, expose more than just a single user account. Identity theft and financial fraud are direct consequences, and the harm can persist for months or years if affectd users do not act.

How Stealer Log Malware Works

Infostealer malware is installed on a victim's device through a phishing email, a fake software download, or a malicious browser extension. Once running, it operates silently and scans the device for saved credentials stored in web browsers, password managers, and application login caches. It records the username, password, and associated URL for each credential it finds, then compiles everything into a structured log file. That file is automaticly transmitted to a server controlled by the attacker. The attacker then sorts and labels the logs, often by category such as cloud accounts or API hosts, and distributes them through Telegram channels or underground markets where other threat actors can download and exploit the data. The SunCloudPubl collection followed this pattern exactly, with logs from 496 infected devices combined into a single file containing 7,623 individual credential records.

Check If You Are Affected

If you had any browser-saved passwords or used cloud services in late 2023, your credentials may have been captured by infostealer malware and included in collections like SunCloudPubl. HEROIC's free breach scanner searches more than 400 billion exposed records, including stealer log collections shared on Telegram and dark web markets, to tell you whether your email or password has been compromised. Run a free search now to see if your data appeared in the SunCloudPubl leak or any other breach.