Inside the ReimannCloud 11-15 Part 2 Breach: What HEROIC Found

HEROIC discovered 1,275 records exposed in the ReimannCloud 11-15 Part 2 stealer log breach on April 5, 2023. A Telegram user uploaded this follow-up archive alongside the first tranche, publishing endpoint data, email accounts, API hosts, and plaintext passwords from infected machines.

Why This Stealer Log Is Dangerous

Part-two archives often contain the overflow that did not fit the initial log, including records for smaller but equally valuable services. Because these drops stay online on Telegram for months, the blast radius keeps expanding as new operators download and weaponize the data.

What Was Exposed in ReimannCloud 11-15 Part 2

• Login credentials (emails and plaintext passwords)
• Browser cookies and session tokens
• Autofill data including addresses and payment details
• Cryptocurrency wallet files and seed phrases
• System fingerprints and device information

HEROIC's investigation tied 1,275 additional endpoint records to the 11-15 series.

Why This Matters

Investigators traced reused credentials across multiple Telegram channels, showing how one stolen password can follow a victim across email, SaaS, and banking accounts. Anyone whose machine appears in either part of the 11-15 series should treat every saved credential as compromised.

How a Stealer Log Like ReimannCloud 11-15 Part 2 Works

Infostealer operators typically split large harvests into numbered parts for faster upload and easier sale. Each archive is generated by malware that reads the browser credential store, exfiltrates cookies and wallets, and then zips the results before pushing them to a Telegram channel.

Check If You Are Affected

HEROIC monitors the world's largest breach database with over 400 billion compromised records. Search your email on HEROIC, change any reused passwords, and enable multi-factor authentication on every sensitive account.