ARCEUSULP US Stealer Log Leak: 120K Plaintext Passwords Exposed

In June 2026, a Telegram user uploaded a stealer log dump labeled ARCEUSULP 164 203219, exposing 120,570 records tied largely to United States internet users. The file contained email addresses, plaintext passwords, and the login URLs where those credentials were used, all harvested directly from infected devices.

Why the ARCEUSULP Leak Is Dangerous for US Users

Unlike a breach of a single company's database, a stealer log like this pulls credentials straight from a victim's browser and system files. That means the 120,570 records inside ARCEUSULP were not stolen from one website. They were collected from whatever accounts the infected person had logged into, then bundled and shared on Telegram for anyone to download.

What Was Exposed in the ARCEUSULP Dump

• Email addresses
• Plaintext passwords (no encryption or hashing)
• Login URLs tied to each set of credentials

Why This Matters

Because the passwords in this leak are stored in plaintext, anyone who downloads the file can read them instantly, no cracking required. That makes the data useful for credential stuffing, where attackers try the same email and password combination across banking, email, and shopping sites. It also opens the door to account takeover, identity theft, and financial fraud for anyone whose details appear in the file.

How Stealer Log Leaks Like This Happen

Stealer logs come from malware that infects a person's computer, often through a fake download, cracked software, or a malicious email attachment. Once installed, the malware quietly copies saved passwords, browser cookies, and autofill data, then sends everything back to the attacker. Files like ARCEUSULP 164 203219 are the packaged result of that theft, uploaded to Telegram channels where they circulate for free or for sale.

Check If You Are Affected

If you live in the United States and reuse passwords across sites, this leak is worth taking seriously. HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including stealer log dumps like this one, so you can find out in seconds whether your information was exposed and take action before someone else uses it.