Researchers Link UP_OCEANCLOUD ULP Part 11 to 4.3 Million Stolen Credentials on Telegram

HEROIC analysts documented the UP_OCEANCLOUD ULP PRVTE 26.01.2026 PART11 dataset in February 2026, tracing it to a Telegram user who distributed a structured stealer log archive containing 4,340,403 records. The collection included email addresses, plaintext passwords, and endpoint URLs harvested by infostealer malware across thousands of compromised machines. Researchers noted the dataset was labeled as a private ULP part file, indicating it belonged to a larger, coordinated multi-part distribution campaign that had been accumulating stolen credentials since at least January 2026.

Why the UP_OCEANCLOUD Stealer Log Is a Direct Threat to Account Security

Stealer log data is fundamentally different from hashed password leaks -- attackers do not need to crack anything. Every credential in this dataset is paired with the exact URL where it was stolen, meaning cybercriminals can immediately attempt logins on the right platform without guessing. With 4.3 million records available, automated credential stuffing tools can cycle through thousands of login attempts per minute. Victims whose passwords appear here face a realistic and immediate risk of account takeover on email, banking, social media, and workplace platforms.

Records Exposed in the UP_OCEANCLOUD ULP PART11 Archive

The 4,340,403 records in this stealer log dataset comprised the following sensitiv data types:

• Email Addresses -- primary identifiers enabling targeted phishing and account enumeration
• Plaintext Passwords -- unencrypted credentials ready for immediate use in login attempts
• URLs -- the specific websites and API endpoints from which each credential was harvested

The Criminal Playbook After a Stealer Log Surfaces on Telegram

Researchers tracking dark web marketplaces and Telegram channels observe a consistent pattern after private ULP logs are published. Within hours, automated bots run credential stuffing attacks against high-value targets including email providers, financial institutions, and e-commerce platforms. Successfully verified accounts are sorted by value and sold in secondary markets. Identity thieves use compromised email access to trigger password resets across linked accounts, enabling full account takeover chains. Financial fraud follows when payment data or banking credentials are present. The multi-part structure of the UP_OCEANCLOUD series suggests an ongoing opration by a threat actor aggregating stolen credentials across multiple malware campaigns, amplifying the total risk to affected users.

Understanding Multi-Part Private ULP Distributions

Private ULP (URL:Login:Password) archives distributed in numbered parts are a signature of organized infostealer operations. Rather than releasing a single large file, threat actors package stolen credential logs into sequential part files to ease distribution across Telegram channels with file size limits. Each part represents credentials harvested from a distinct batch of infected machines. The PART11 designation in this dataset indicates it is the eleventh installment in the UP_OCEANCLOUD series, meaning the full collection likely contains tens of millions of records across all parts. Malware families such as RedLine, Raccoon, and Vidar are commonly responsible for generating ULP-formatted logs, which are then aggregated, sorted, and repackaged by criminal operators before sale or distribution.

Find Out If Your Email Appeared in This Breach

HEROIC's free breach scanner covers more than 400 billion exposed records, including stealer log collections like the UP_OCEANCLOUD ULP PRVTE series. Enter your email address to instantly check whether your credentials were compromised. If your data appears in this or any other breach, update affected passwords immediately and activate two-factor authentication on all important accounts. Early detection is the most effectve defense against credential-based account takeover.