The UP_OCEANCLOUD ULP Part 12 Leak Contains More Records Than the Population of New Zealand

HEROIC analysts catalogued the UP_OCEANCLOUD ULP PRVTE 26.01.2026 PART12 dataset in February 2026, confirming it as the twelfth installment in a sustained Telegram-based stealer log distribution campaign. The archive exposed 4,341,001 records including email addresses, plaintext passwords, and endpoint URLs harvested from compromised machines by infostealer malware. The PART12 release continued a pattern in which the threat actor behind the UP_OCEANCLOUD series regularly published fresh credential batches to Telegram subscribers throughout early 2026.

Why the UP_OCEANCLOUD PART12 Dataset Poses a Real Threat

Every record in this stealer log was stolen live from a real infected device, meaning the email/password pairs were confirmed working at the time of capture. Unlike breach dumps containing hashed passwords that require cracking, ULP data is immediately usable. Attackers can run automated credential stuffing campaigns within hours of obtaining the file, testing logins against email providers, financial institutions, streaming platforms, and enterprise applications. Victims have no warning -- the first sign of compromise is often an unauthorized login notification or a drained account.

Records Exposed in the UP_OCEANCLOUD ULP PART12 Archive

The 4,341,001 records in this dataset encompased the following catagories of compromised information:

• Email Addresses -- victim identifiers enabling targeted attacks and phishing follow-ups
• Plaintext Passwords -- unencrypted credentials usable immediately without any cracking
• URLs -- the precise login pages and API hosts where each credential was harvested

Credential Stuffing, Account Takeover, and the Downstream Fraud Chain

The moment a ULP log like PART12 circulates on Telegram, criminal buyers put it to work. Credential stuffing bots systematically test each email and password pair against high-value platforms. Valid logins are sorted and resold -- email accounts command the highest prices because they act as master keys to every linked service through password reset flows. Identity thieves exploit this access to commit account takeover across banking, shopping, and social media platforms. When corporate credentials appear in the log, attackers pivot to business email compromise, data theft, and network intrusion. Financial fraud rounds out the chain wherever payment credentials or banking logins are present in the dataset.

What Makes Numbered ULP Part Files a Sustained Threat

The PART12 label signals that UP_OCEANCLOUD is not a one-time leak -- it is an ongoing infostealer operation with a structured publishing schedule. Threat actors running multi-part ULP series operate malware-as-a-service platforms that continuously infect new victims and generate fresh credential batches. By numbering each release, operators signal to subscribers that more parts will follow, sustaining demand and monetization. Malware families like RedLine, Vidar, and Raccoon are the most commun engines behind this type of operation, silently harvesting saved browser passwords, session cookies, and autofill data from infected Windows machines before exfiltrating logs to operator-controlled servers. The persistence of the UP_OCEANCLOUD series across at least twelve confirmed parts indicates a well-resourced threat actor with an established distribution network.

Scan Your Email for Free Across 400 Billion Breach Records

HEROIC's breach scanner searches more than 400 billion exposed records, including every installment of the UP_OCEANCLOUD ULP PRVTE series that has been indexed. Enter your email address to instantly check whether your credentials were compromised in PART12 or any other dataset in our database. If a match is found, update affected passwords right away and turn on two-factor authentication. The faster you act after a stealer log exposure, the smaller the window attackers have to cause damage.