Breach Intelligence Report 22 Sep 2025

13,944 Passwords Compromised: Monster Cloud Free 28 Report

HEROIC
HEROIC Threat Intelligence Team
Email Addresses Plaintext Password Urls
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Records Exposed 13,944
Source Type Stealer log
Origin Telegram
Password Type plaintext

Opening: The Biggest Single Monster Cloud Batch

Monster Cloud Free 28 is the single largest credential dump from Monster Cloud on October 6, 2023. With 13,944 stolen US passwords, it accounts for 16% of everything Monster Cloud released that day. This was their top performer -- the batch that stole the most credentials.

The Danger: Plaintext Passwords Ready for Immediate Attacks

All 13,944 passwords are plaintext -- stolen directly from web browsers on infected computers. Criminals don't need to crack them. They can use them immediatly to log into your real accounts and steal money, steal identities, or sell them to other crooks. Email addresses make each victim identifiable and targetable.

What Was Exposed

  • 13,944 US user passwords (plaintext)
  • Email addresses (identifies victims)
  • Web service URLs (shows which accounts compromised)
  • Browser credential data from infected PCs
  • Released October 6, 2023 on Telegram

Why This Batch Matters: Largest Oct 6 Release

Free 28 represents the absolute peak of Monster Cloud's October 6 operation. No other batch came close to stealing this many credentials in a single day. This level of harvest suggests Monster Cloud had significant malware infrastructure infecting thousands of computers simultaniously.

How Criminals Harvested Your Passwords

Infostealer malware infected computers and copied saved passwords from browsers. Chrome stores them. Firefox stores them. Edge stores them. The malware accessed them all automatically. Users never detected anything -- the malware worked silently in the backround the whole time.

Check If You're In This Breach Now

HEROIC's free breach scanner searches 400+ billion exposed records including Monster Cloud Free 28. If your email is found, change your passwords immediately on all accounts. Setup two-factor authentification right away to block account takeover.

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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 3,664 scanned today
Breach Rank #N/A by affected users
Impact Score
1
sensitivity + scale + recency
Est. Financial Impact $100.9K fraud, phishing & misuse risk
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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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