The GuronSoft Merge Combolist: 41,547 Passwords Exposed

In January 2023, HEROIC analysts identified a stealer log named "GuronSoft_Merge_all_cleaned_normalized_randomize_cleaned_nodup," uploaded by a Telegram user, exposing 41,547 records made up of email addresses, plaintext passwords, and the URLs each login was used on.

What the Filename Reveals About This Combolist

The name of this file describes exactly what it is: multiple stolen credential sets merged together, cleaned of formatting errors, normalized into a consistent layout, shuffled, and stripped of duplicates. That process turns raw, messy stealer log output into a polished, ready-to-use "combolist," the kind of file criminals prize because it is easy to load directly into automated login tools without extra cleanup work.

What Was Exposed

• Email addresses drawn from multiple merged sources
• Plaintext passwords, stored with no encryption
• URLs identifying the exact site each credential pair belongs to

Why This Matters

A cleaned and deduplicated combolist like this one is built specifically to make credential stuffing more efficient, every entry is a unique, working login with no wasted attempts on duplicates or garbled data. For the 41,547 people in this file, that means a meaningfully higher chance an attacker will successfully log in somewhere using their exposed email and password, leading to account takeover, fraud, or identity theft.

How a Merged Combolist Like This Gets Made

The process starts with ordinary stealer logs, malware-collected files containing raw logins from infected devices. Someone then combines several of these logs, removes broken or incomplete entries, standardizes the formatting so every line matches, randomizes the order, and deletes duplicate records. The result is a leaner, higher-quality file that trades hands more easily on Telegram than the original, messier logs it came from.

Check If You Are Affected

Combolists like this one are built to be used quickly, so checking your exposure early matters. HEROIC's free breach scanner checks your email address against a database of more than 400 billion breached and leaked records, so you can see in seconds whether your login was part of this merge and take action right away.