Inside SunCloudNew Stealer Logs: How Malware Harvested 51,918 Passwords

HEROIC analysts identified the SunCloudNew 1311 stealer log, uploaded to Telegram on October 11, 2025 and exposing 51,918 records. The stolen data includes email addresses, plaintext passwords, and URLs extracted from compromised devices by infostealer malware operating under the SunCloudNew campaign. This breach type is one of the fastest-growing threats to personal account security, and understanding how it works is the first step to protecting yourself.

Why SunCloudNew 1311 Stealer Log Credentials Are Immediately Dangerous

Stealer log breaches are uniquely dangerous because the passwords they contain were never encrypted. Unlike database breaches where passwords are hashed and must be cracked, stealer log data is taken directly from browser storage in readable form. This means every one of the 51,918 password entries in the SunCloudNew 1311 dataset can be used the moment the file is downloaded. Combined with the URLs in the dataset that show exactly which sites each victim used, attackers have a ready-made list of accounts to target with zero additional effort.

Data Exposed in the SunCloudNew 1311 Stealer Log

• Email Addresses — account identifiers used to locate victims on any platform
• Plaintext Passwords — immediately usable credentials requiring no cracking
• URLs — the specific websites each victim was actively logged into when compromised

How Stolen SunCloudNew Credentials Enable Account Takeover, Identity Theft, and Financial Fraud

Once a criminal has a plaintext email and password pair, credential stuffing is the first move. Automated tools cycle through stolen logins against banking portals, email providers, social media, and subscription services at thousands of attempts per minute. A successful hit on an email account opens every door: the attacker can reset passwords on linked accounts, intercept two-factor authentication codes, and lock the original owner out entirely. Identity theft follows when the attacker accumulates enough personal information to impersonate the victim. Financial fraud is the endpoint, whether through unauthorized purchases, bank transfers, or fraudulent loan applications made in the victim's name.

Inside Stealer Log Malware: How SunCloudNew Harvested 51,918 Passwords

Stealer log malware like the type used in the SunCloudNew campaign works by quietly infiltrating a device through a malicious download, phishing link, or compromised software installer. Once active, it targets the credential storage built into popular web browsers. Chrome, Firefox, Edge, and Brave all store saved passwords in local databases that the operating system protects under normal circumstances, but infostealer malware bypasses these protections by running with the same privileges as the logged-in user. It reads the saved passwords, collects active session cookies, records the URLs of recently visited sites, and bundles all of this into a compressed log file. That file is then transmitted to a collection server and eventually shared or sold on Telegram. The SunCloudNew naming series suggests an ongoing campaign that numbered its files sequentially, implying that 1311 is one release in a much larger, continuus operation targeting devices over time.

Check If You Were Affected by the SunCloudNew 1311 Stealer Log

HEROIC's free breach scanner searches more than 400 billion compromised records, including stealer logs from ongoing campaigns like SunCloudNew. If your email address appeared in the 1311 dataset or any other known breach, you will receive an immediate notification so you can change your passwords and secure your accounts before an attacker exploits them. Run a free scan at heroic.com and take control of your credential security today.