Breach Intelligence Report 22 Sep 2025

10,144 Passwords Stolen: Monster Cloud Free 18 Breach

HEROIC
HEROIC Threat Intelligence Team
Email Addresses Plaintext Password Urls
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Records Exposed 10,144
Source Type Stealer log
Origin Telegram
Password Type plaintext

Opening: Consecutive Release in Monster Cloud Dump

Monster Cloud Free 18 exposed 10,144 stolen US passwords on October 6, 2023 -- released right alongside Free 17 on the exact same day. This shows Monster Cloud wasn't releasing random batches; they had organized, sequential operations stealing thousands of credentials continuously.

The Danger: Plaintext Passwords Ready for Immediate Exploitation

Every single password in this breach is plaintext -- stolen directly from web browser storage on infected computers. Criminals don't need to crack them or decrypt them. They can use them immediately to access accounts, drain bank balances, or commit fraud. The email addresses included make victims identifiable.

What Was Exposed

  • 10,144 US user credentials
  • Plaintext passwords from web browsers
  • Email addresses (personally identifiable)
  • Service URLs (showing which accounts are compromised)
  • Released October 6, 2023 on Telegram

Why This Matters: Industrial Organization

Free 17 and Free 18 were released together, sequential batch numbers from the same day. This reveals Monster Cloud had systematic, organized operations -- they weren't random thieves. They had infrastructure, processes, and coordinated releases. That's what makes them dangerous.

How Criminals Stole Your Data

Infostealer malware infected computers and copied passwords stored in Chrome, Firefox, Edge, and Safari. The malware didn't require special hacker skills to access these stored credentials -- it's automated extraction. Every infected computer became a password harvesting machine.

Protect Yourself Right Away

Use HEROIC's free breach scanner to check if your email appears in Monster Cloud Free 18. We search 400+ billion exposed records instantaneously. If you're in the breach, change your passwords immediatly and enable two-factor authentification on all accounts.

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Breach Breakdown

Domain N/A
Leaked Data Email Addresses,Plaintext Password,URLs
Password Types plaintext
Date Leaked 22 Sep 2025
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Private & Secure No Account Needed 3,532 scanned today
Breach Rank #N/A by affected users
Impact Score
0
sensitivity + scale + recency
Est. Financial Impact $73.4K fraud, phishing & misuse risk
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  • Financial information
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Identity Theft Risk Score

Risk Score: 8.7/10 - Critical

Data Exposure Analysis

Passwords Critical
Financial High
Personal Medium
Social High
Security Critical

Breach Timeline Analysis

March 2024 Multiple credentials exposed in recent data breach
January 2024 Password found in dark web marketplace
December 2023 Personal information leaked in major security incident

Security Recommendations

High Priority
Password Security

Critical: Change compromised passwords immediately and enable 2FA on all accounts

Important
Financial Protection

Monitor credit reports and set up fraud alerts with major credit bureaus

Recommended
Identity Protection

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