The ‘ok’ Stealer Log Targets Hotmail Users: 2,361 Accounts Exposed

The "ok" Stealer Log Targets a Small Batch of Real Accounts

On April 9, 2024, HEROIC analysts identified a stealer log file, simply named "ok," being uploaded by a user on Telegram. Despite the plain name, the file was far from harmless: it contained 2,361 records, each pairing an email address with a plaintext password and the URL the login was used on.

Why This Is Dangerous

Even at just over two thousand records, this file gives an attacker instant, ready-to-use access to real accounts, since the passwords are stored in plaintext with no encryption to defeat. Files with generic, throwaway names like "ok" are often uploaded casually and shared quickly between low-level criminals, which can mean the victims inside have no idea their credentials are already circulating.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs tied to each login

Why This Matters

Whoever these 2,361 accounts belong to, the danger is the same as with any other stolen credential set: attackers can attempt to log directly into the associated email account and use it to reset passwords elsewhere. Because password reuse is so common, a single exposed login can lead to credential stuffing attempts against banking, shopping, or social accounts that share the same password.

How Stealer Logs Work

This file was almost certainly produced by infostealer malware, software that infects a device and quietly extracts every saved login from the browser before sending it to an attacker's server. The vague, one-word file name suggests it was a quick, informal upload rather than a carefully curated combo list, which is common with smaller stealer logs shared in bulk on Telegram.

Check If You Are Affected

Because stealer logs like this one are often traded before victims ever find out, checking your exposure directly is the safest approach. HEROIC's free breach scanner searches more than 400 billion leaked records, including small stealer logs like this 2,361 record file, to show you if your email address has been compromised. Run a free scan and update any password that comes back as exposed.