Breach Intelligence Report 22 Mar 2026

Inside File 64: 4,978,776 Passwords Sitting in Plaintext

HEROIC
HEROIC Threat Intelligence Team
Email Addresses Plaintext Password Urls
Stealer Logs Files_17.10_18.21_64 uploaded by a Telegram User
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Records Exposed 4,978,776
Source Type Combolist
Origin United States
Password Type plaintext

Look closely at just one line inside "Files_17.10_18.21_64," the combolist that appeared on Telegram on 10-Oct-2024. It's small, unremarkable, an email address followed by a colon and a plaintext password. Now multiply that single line by 4,978,776 and you start to grasp what this file actually represents.


Why This Is Dangerous

That tiny detail, the plaintext password sitting right next to the email with nothing hiding it, is the entire danger in a nutshell. There's no hash to crack, no salt to work around, just a readable string that works the instant someone copies and pastes it into a login form.


What Was Exposed

  • 4,978,776 individual lines pairing emails with plaintext passwords
  • URLs attached to each line identifying the targeted account
  • Zero encryption anywhere in the file's structure

Why This Matters

Zoom back out and the individual line stops being a curiosity and becomes a personal risk if it happens to be yours. Nearly 5 million of these tiny, easily overlooked lines add up to one of the larger combolists released that day, and each one represents a real person's account sitting exposed.


How Each Line Got There

Every entry traces back to stealer malware quietly copying saved credentials off an infected device before shipping them to a remote server. From there, individual harvested lines from many devices get merged into a single master file like this one, which is why the format looks so uniform despite coming from thousands of separate sources.


Check If You Are Affected

One line out of nearly 5 million could be yours, and there's no way to spot it by eye. HEROIC's free scanner checks your email against more than 400 billion leaked records, including this Files_17.10_18.21_64 combolist, so you get a definite answer instead of a guess.

Breach Breakdown

Domain Files_17.10_18.21_64 uploaded by a Telegram User
Leaked Data Email Addresses,Plaintext Password,URLs
Password Types plaintext
Date Leaked 22 Mar 2026
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Private & Secure No Account Needed 2,744 scanned today
Breach Rank #665 by affected users
Impact Score
40
sensitivity + scale + recency
Est. Financial Impact $36.0M 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

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Identity Protection

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