The 666 PCS OCTOPUS Leak Contains More Stolen Records Than Most Small Town Populations

In August 2023, HEROIC researchers captured and indexed a stealer log file uploaded to Telegram by an anonymous actor using the label 666 PCS - AUGUST - OCTOPUS. The dataset contained 7,614 records, each pairing an email address with a plaintext password and the URL of the specific service targeted during the malware infection. The data was harvested by information-stealing malware running silently on victims' devices before being compressed into an archive and published to a Telegram channel, where it became accessible to any subscriber.

Why This Is Dangerous

The 666 PCS - AUGUST - OCTOPUS dataset is operationally dangerous because every credential it contains was captured live from an infected device, meaning the passwords were confirmed working at the moment of theft. Attackers who obtain this file do not need to crack hashes or guess login details. The service URLs included with each record tell them precisely where to submit the stolen credentials. This removes the guesswork from account takeover and makes even a smaller dataset like this one highly valuable in underground markets where verified credentials command a premium price.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (service endpoints harvested alongside each stolen credential)

Why This Matters

The 666 PCS - AUGUST - OCTOPUS dump contains more records than a mid-sized company's entire customer database. At 7,614 verified credential pairs, this dataset is sufficient to fuel automated credential stuffing campaigns across banking platforms, email providers, and retail services simultaneously. Each successful account takeover opens the door to identity theft, financial fraud, and secondary breaches as attackers exploit password reset flows to reach additionaly linked accounts. The seperate services targeted by each stolen credential amplify the cascading damage when password reuse is present.

How Stealer Logs Work

Stealer log malware is designed to infiltrate a device without triggering alerts. It typically arrives through phishing emails, trojanized game cracks, or malicious browser extensions. Once active, it enumerates the device's browser-saved passwords, session cookies, and autofill data within seconds, compressing the results into a structured log file. That file is exfiltrated to the attacker's infrastructure and then redistributed. The 666 PCS - AUGUST - OCTOPUS archive followed this pattern exactly, with the Telegram upload making the data available globally without any technical barrier to access. Victims recieve no notification because the theft happend on their own devices rather than at a service provider's servers.

Check If You Are Affected

HEROIC has indexed the 666 PCS - AUGUST - OCTOPUS stealer log in its breach database, which now contains more than 400 billion compromised records. Because stealer log breaches never generate official corporate disclosures, HEROIC's free scanner may be the only tool capable of detecting whether your adress was included in this dataset. Run a free email search now to find out if your credentials were stolen and to take action before attackers do.