Breach Intelligence Report 21 Feb 2026

One Telegram Post. 2.9M Passwords. The 5kk-ulpmixbases 460 Dump.

HEROIC
HEROIC Threat Intelligence Team 21 Feb 2026
Email Addresses Plaintext Password Urls
Stealer Logs 5kk-ulpmixbases 460 uploaded by a Telegram User
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Records Exposed 2,955,757
Source Type Stealer log
Origin United States
Password Type plaintext

In August 2024, a telegram user uploaded a stealer log file that exposed {0} records of endpoints, email, API host and passwords.

Breach Breakdown

Domain 5kk-ulpmixbases 460 uploaded by a Telegram User
Leaked Data Email Addresses,Plaintext Password,URLs
Password Types plaintext
Date Leaked 21 Feb 2026
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Breach Rank #N/A by affected users
Impact Score
40
sensitivity + scale + recency
Est. Financial Impact $21.4M 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

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