What Is a Stealer Log? 1.66M Records Leaked in Mansory 8 Dump

What Is a Stealer Log? Inside the 1,656,802-Record "Mansory 8" Dump

On 9 March 2026, HEROIC analysts identified a stealer log named "Mansory 8" uploaded to a Telegram channel, containing 1,656,802 records. This is one of the largest single files HEROIC has tracked in this series, pairing each email address with a plaintext password and the login URL it was captured from, spanning a wide mix of websites rather than a single company.

Why Understanding "Stealer Log" Matters Here

A stealer log is not the result of a company being hacked. It is a collection of credentials pulled directly off individual victims' computers by infostealer malware, then compiled by criminals into one file. That distinction matters because it means the 1,656,802 records here come from over a million separate malware infections rather than one central breach.

What Was Exposed

• Email addresses
• Plaintext passwords
• Login URLs across a wide range of sites

Why a Log This Size Has Wide-Reaching Consequences

With over 1.6 million plaintext credential pairs in one file, attackers have enormous scale for automated credential stuffing across banking, retail, and social media platforms. That scale translates directly into a higher volume of account takeover, identity theft, and financial fraud cases tied back to a single dump.

How a Dump This Large Comes Together

Infostealer malware spreads through pirated software, cracked games, and malicious downloads, silently harvesting saved passwords, cookies, and autofill data from each infected device. Sellers, in this case operating under the label "Mansory," compile harvests from enormous numbers of infections into large, numbered dumps and sell or share them on Telegram.

Check If You Are Affected

With more than 1.6 million records in play, the odds that your credentials are included are far from negligible. HEROIC's free breach scanner checks your email against more than 400 billion breached and leaked records, including stealer logs like this one, so you can find out immediately.