The KepperCloud372 Dump Contains Exactly 5,060 Email and Password Pairs

HEROIC analysts identified the KepperCloud372 stealer log on December 10th, 2022, after an anonymous Telegram user uploaded the file to an underground distribution channel. The dataset contained exactly 5,060 records, each representing a compromised endpoint in the United States. The precision of the count is notable -- this is not an estimate or a rounded figure. Each of those 5,060 records contained a victim's email address, a plaintext password, and one or more URLs including API host endpoints that the infected device had accessed. The structured nature of the log confirms it was generated automatically by infostealer malware, not assembled by hand.

Why the KepperCloud372 Stealer Log Is Dangerous

5,060 records may sound modest compared to multi-million record breaches, but the quality of the data makes it highly dangerous. Every single password in this dump is in plaintext. No cracking, no rainbow tables, no GPU time required -- an attacker simply opens the file and starts logging in. The API host URLs are a particularly serious element: they indicate that some victims were authenticated into backend services, not just consumer websites. If any of those API credentials remain active, an attacker who downloaded this log in 2022 may still have access to those systems today. Victims likely recieve no automatic notification when stealer logs are uploaded to Telegram channels.

What Was Exposed

• Email Addresses
• Plaintext Passwords
• URLs (accessed websites and API host endpoints)

Why This Matters

Stealer logs from 2022 remain dangerous in 2026. Passwords rarely change unless users are prompted by a breach notification -- and most people never recieve one for stealer log exposures. The 5,060 people in this dataset may have been using the same passwords for years without knowing their credentials were harvested. The API URLs included in this dump are particularly concerning for organizations: if an employee's device was infected and their work credentials were captured, those credentials may have been used to access internal systems long before the infection was ever detected. This breach occured during a period of sharp increase in infostealer activity globally, and its effects may persist years after the initial upload.

How Stealer Log Breaches Work

Infostealer malware is typically delivered via phishing emails, cracked software, or malicious browser extensions. Once installed on a victim's device, it operates silently in the background, extracting saved credentials from browsers, email clients, and third-party applications. The collected data is formatted into a structured log file and transmitted to the attacker's server. These seperate log files are then packaged and distributed on Telegram channels and dark web forums, where they are downloaded by threat actors who use them for credential stuffing, account takeover, and targeted phishing campaigns. The entire infection-to-distribution pipeline can complete in under an hour.

Check If You Are Affected

HEROIC's free breach scanner checks your email address against more than 400 billion records, including stealer logs like the KepperCloud372 Telegram dump. Even if this breach is from 2022, if your credentials were in that file and you haven't changed your passwords since, you are still at risk. Run a free scan at HEROIC now to find out exactly which breaches contain your data -- and what to do about it.