25,843 Stolen Logins From the 26K Mixed Domains Telegram Log Surfaced

In March 2026, HEROIC analysts uncovered a stealer log file uploaded to a private Telegram channel under the label "26K Mixed Domains." The archive contained 25,843 records, each pairing an email address with a plaintext password and the URL of the site the credentials were stolen from. The data was harvested by infostealer malware running silently on infected devices belonging to ordinary people across a wide range of websites and services. The "mixed domains" label indicates these records span many different industries and platforms, meaning nearly any type of online account could be represented in this file.

Why the 26K Mixed Domains Stealer Log Is Dangerous

Twenty-five thousand plaintext credentials, each tagged with the exact website they came from, is a ready-made attack resource. Attackers who obtain this file do not need to crack or decode anything. The passwords are fully readable and paired with the destination site, meaning automated login tools can begin testing these records against live accounts almost immediately after the file is downloaded. The "mixed domains" nature of this archive also means the damage is not concentrated on any single platform -- it is spread across potentially hundreds of websites, making it much harder for any one company to detect or respond to the resulting attack traffic.

What the 26K Mixed Domains Stealer Log Exposed

• Email addresses (the login identifier for each compromised account)
• Plaintext passwords (completely unencrypted, readable without any additional tools)
• URLs (the exact websites each stolen credential belongs to)

Plaintext passwords are the worst-case scenario in any breach. Most database leaks expose hashed passwords that require significant effort to crack. These do not. Anyone who downloads this file can read every password directly, just as the victim typed it. The URL component removes all guesswork about where those passwords work, making each record immediatley actionable for an attacker.

Why This Matters: Mixed Domain Leaks Reach Across Your Entire Online Life

Because this stealer log spans many different types of websites and services, the potential impact is unusually broad. A single person's credentials could appear alongside records from banking sites, social media platforms, email providers, retail accounts, and workplace tools -- all in the same file. Credential stuffing attacks powered by mixed-domain lists are especially effective because attackers can test each email and password combination against dozens of platforms in parallel. If you reuse passwords across multiple sites, a single confirmed hit in this dataset can cascade into a total account takeover across your entire digital presence. The breadth of a mixed-domain dump also means it is very difficult to predict which of your accounts might be at risk without actually checking.

How Stealer Logs Like 26K Mixed Domains Are Created

Stealer logs do not come from hacking a company's servers. They come from hacking individual people's computers. Infostealer malware spreads through channels like cracked software downloads, fake browser updates, phishing emails, and malicious file attachments. Once installed on a device, the malware runs silently in the background, monitoring browser sessions and capturing every username and password the victim enters on any website. Each login is recorded along with the URL of the site it belongs to. The stolen data is packaged into log files and transmitted to an attacker-controlled server, then compiled and uploaded to Telegram channels for distribution. The 26K Mixed Domains file is a direct product of this kind of campaign -- 25,843 login sessions captured from real people's devices without their knowlege or consent.

Check If Your Accounts Were in the 26K Mixed Domains Stealer Log

HEROIC maintains a database of over 400 billion compromised records, including stealer logs, combolists, and breach data sourced from the dark web and private Telegram channels. If your email address appeared in the 26K Mixed Domains upload or any other known breach, a free search on HEROIC will find it. No account is required. Because this file spans many different types of services, checking your email is the fastest way to understand whether any of your accounts -- not just one -- may be at risk. Search now before an attacker gets there first.