Your Data May Already Be Compromised. The Black_Cloudx 70 Breach Exposed 864K Records.

HEROIC analysts added this breach to the database after a Telegram user operating under the name "Black_Cloudx 70" uploaded a stealer log file in May 2026. The file contained 864,831 records, each one harvested from a device that had been silently infected with infostealer malware. Every record paired an email address with a plaintext password and the URL of the site where those credentials were entered. The data was shared across underground Telegram channels where threat actors trade stolen credential files.

Why Plaintext Stealer Log Credentials Are the Worst Kind of Leak

Not all breaches are created equal. A database dump from a company might expose hashed passwords that take time and computing power to crack. A stealer log like this one skips that step entirely. The passwords in this file are stored exactly as the victim typed them, because the malware captured them before the browser could encrypt anything. That means every one of the 864,831 records in the Black_Cloudx 70 file is immeditly usable by anyone who downloads it. There is no cracking, no decoding, no extra work required.

What the Black_Cloudx 70 Telegram Upload Exposed

The stealer log file shared by Black_Cloudx 70 contained three fields per record, all pulled live from infected endpoints:

• Email addresses used to log into accounts across the web
• Plaintext passwords captured in real time by the infostealer malware
• URLs showing exactly which website each credential pair belongs to

The URL field is what makes stealer logs particularly valuable to attackers. Instead of guessing which sites a credential might work on, the attacker already has a map. They know your email, your password, and where to use it.

Why This Matters for Credential Stuffing and Identity Theft

Credential stuffing tools can process thousands of logins per minute. Once a file like this lands in the wrong hands, automated bots begin testing each credential against popular banking apps, email providers, subscription services, and retail sites. The more places you use the same password, the more accounts get compromised in a single sweep.

• A compromised email account lets attackers reset passwords on every other account tied to that email.
• Access to a bank or payment account can lead to direct financial fraud or unauthorized transfers.
• Personal informaton gathered from multiple breached accounts fuels convincing phishing attempts and identity theft applications.
• Session cookies captured alongside passwords can let attackers bypass two-factor authentication entirely.

How Black_Cloudx and Telegram Stealer Log Channels Operate

Telegram has become a primary distribution hub for stolen credentials. Here is how these operations typically work:

1. Threat actors deploy infostealer malware through cracked software downloads, malicious browser extensions, phishing emails, and fake app stores. The malware runs silently in the background, logging keystrokes and copying browser-saved credentials.
2. Stolen data is aggregated into log files organized by date, country, or infection campaign. These files are then uploaded to private or semi-public Telegram channels.
3. Channel operators like "Black_Cloudx" build reputations by sharing large, verified credential files for free or for low-cost subscriptions. This attracts more buyers and expands their network in underground communities.
4. The files are downloaded, resold, and incorporated into larger combolists that circulate on dark web forums for months or years after the original upload.

The 864,831 records in this file represent the direct output of that pipeline, devices infected, credentials stolen, and data posted online in May 2026.

Check If Your Email Appeared in the Black_Cloudx 70 Breach

HEROIC maintains a breach database of over 400 billion records spanning stealer logs, database dumps, combolists, and dark web leaks. The Black_Cloudx 70 Telegram upload is indexed in that database. If your email address was part of this leak or any other known breach, a free search at heroic.com will surface the results instantly.

The search requires no account, no payment, and no personal informaton beyond the email address you want to check. If your credentials appear, change the affected passwords immediately, enable two-factor authentication on those accounts, and avoid reusing any password across more than one site.