Stolen Redline Cl0ud4 Data: 44,875 Records Leaked on Dark Web

HEROIC's intelligence team identified a stealer log collection labeled Redline Cl0ud4 being distributed on dark web platforms in June 2026. This breach exposes 44,875 records of stolen authentication data, with the "Redline" designation indicating the data was likely harvested by variants of the notorious RedLine infostealer malware family.

Plaintext Passwords from RedLine Malware Campaigns

The 44,875 passwords in this data set are all in plaintext, a hallmark of RedLine stealer operations that capture credentials exactly as users type or store them. Unlike breaches where passwords are hashed, these credentials require no cracking whatsoever. Any attacker with access to this data can immediately attempt to log into the compromised accounts, making speed of response critical for anyone who may have been affected.

What Was Exposed

• Email Addresses — login identifiers harvested from browser autofill and saved credential stores
• Plaintext Passwords — raw, unencrypted passwords captured during active browser sessions
• URLs — the specific login pages and web applications where victims authenticated

From One Breach to Many: The Credential Stuffing Pipeline

The 44,875 credential pairs from Redline Cl0ud4 will inevitably be fed into credential stuffing frameworks that probe login systems worldwide. Each successful match gives attackers a foothold in a new account. From there, they can escalate access, harvest personal information, initiate fraudulent transactions, or use the compromised account as a stepping stone to breach connected services. The practice of password reuse transforms a single data point into a network of vulnerabilities.

RedLine Stealer: One of the Most Prolific Infostealers

RedLine is one of the most widely deployed infostealer malware families in the cybercriminal ecosystem. It is sold as malware-as-a-service on underground forums, allowing even inexperienced threat actors to deploy it at scale. RedLine targets browsers, email clients, FTP applications, VPN configurations, and cryptocurrency wallets. It captures stored passwords, browser cookies, credit card numbers stored in autofill, and system information, packaging everything into organized logs that are then traded or sold in bulk.

Check If Your Credentials Were Exposed

HEROIC's comprehensive database includes over 400 billion compromised records from breaches, stealer logs, and dark web data sources. Use HEROIC's free breach scanner to check if your email address or password was captured in the Redline Cl0ud4 stealer log or any other breach monitored by HEROIC.