Inside ReimannCloud 08-11: Stealer Malware Harvested 1,146 Accounts

HEROIC discovered 1,146 records exposed in the ReimannCloud 08-11 uploaded by a Telegram User stealer log breach on 05-Apr-2023. A Telegram operator uploaded the archive publicly, bundling credentials harvested by commodity infostealer malware from infected endpoints.

Why This Stealer Log Is Dangerous

Stealer logs package fully working plaintext credentials alongside the exact URLs where they were used. Unlike hashed breach dumps, attackers can copy and paste these logins directly into live sites. Because the malware captured active sessions, multi-factor prompts may also be bypassed using stolen cookies.

What Was Exposed in ReimannCloud 08-11

• 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

Victims are scattered across consumer, enterprise, and financial services endpoints.

Why This Matters

Every plaintext password in the log is immediately usable for credential stuffing at scale. Attackers recycle these credentials against banking, email, and crypto platforms to drain accounts. The longer the log circulates, the larger the downstream takeover footprint grows.

How a Stealer Log Like ReimannCloud 08-11 Works

An infostealer like RedLine, Raccoon, or Vidar silently runs on a victim device, exfiltrating browser vaults, cookie jars, and wallet files to a command server. Operators compile those captures into archives and resell or dump them on Telegram. Each archive can contain thousands of accounts from a single operator batch.

Check If You Are Affected

HEROIC monitors the world's largest breach database with over 400 billion compromised records. Run your email through the HEROIC exposure check and rotate every password that has been reused across sites since early 2023.