US Stealer Log Batch 04-1 Exposes 9,958 Login Credentials

In April 2026, a cybercriminal uploaded a stealer log file to a Telegram channel labeled "US 04-1," exposing 9,958 records tied to victims across the United States. The data was harvested directly from infected computers and includes email addresses, plaintext passwords, and the website URLs each login was used on.

Why This US-Targeted Stealer Log Is Dangerous

Unlike a single-company data breach, a stealer log pulls credentials straight from a victim's own device, capturing whatever usernames and passwords were saved in a browser or autofill form at the time of infection. That means the 9,958 records in this batch are not tied to one website. They span whatever accounts each infected person was logged into, from email and banking portals to shopping and social accounts, all bundled together and shared on Telegram in plaintext.

What Was Exposed in the US 04-1 Log

• Email addresses
• Plaintext passwords (stored and shared with no encryption)
• URLs showing exactly which websites and login pages each credential unlocks

Why This Matters

Because the passwords in this log are plaintext and matched directly to the URLs they unlock, anyone who obtains this file can immediately try logging into a victim's email, banking, or shopping accounts. If a password was reused anywhere else, the risk multiplies through credential stuffing, where attackers automatically test the same email and password pair across hundreds of other sites. From there, account takeover, identity theft, and financial fraud are all realistic outcomes.

How Stealer Log Leaks Like This Happen

Stealer logs come from malware, often disguised as cracked software, game cheats, or fake browser updates, that quietly installs itself on a victim's computer. Once active, it copies every saved password, autofill entry, and browser cookie it can find, then sends that data back to the attacker. The result is a text file listing usernames, passwords, and the exact site each one belongs to. These logs are then packaged into batches like "US 04-1" and traded or dumped on Telegram channels and dark web forums.

Check If You Are Affected

You do not need to know which infected device this data came from to find out if your information is in it. HEROIC's free breach scanner checks your email address against more than 400 billion leaked and breached records, including stealer logs like this one, and tells you instantly if you have been exposed. If you are affected, the scanner will also show you what to do next to lock down your accounts.