The Napoleon Corp Stealer Log Gave Hackers 42,844 Plaintext Logins

HEROIC analysts confirmed that in October 2025, a Telegram user uploaded a stealer log file associated with a group identified as Napoleon Corp, exposing 42,844 records. The dump contained email addresses, plaintext passwords, and URLs harvested from compromised devices across the United States. Napoleon Corp-branded logs are part of a pattern of organized infostealer operations where threat actors package and distribute credentials under consistent branding to build reputation in underground markets. With nearly 43,000 records in this single release, the scope of exposure is significant.

Why This Is Dangerous: What the Napoleon Corp Stealer Log Hands Attackers

The Napoleon Corp dump gives attackers 42,844 ready-to-use credential pairs with no additional processing needed. Each record includes the exact URL of the targeted service alongside a matching email and plaintext password. This means attackers can immediately begin logging into the affected accounts, bypassing any need to crack or guess passwords. The scope of potential damage includes full account takeover of email services, social media platforms, e-commerce accounts, and any other service where the same password was reused.

Data Exposed in the Napoleon Corp UP 416 Stealer Log

• Email Addresses
• Plaintext Passwords
• URLs (service endpoints and login pages)

From Credential Stuffing to Financial Fraud: The Attack Chain

Once attackers have the Napoleon Corp credential list, they run it through automated stuffing tools that test each pair against hundreds of services simultaneously. Successful logins trigger an account takeover sequence: email access allows password resets on financial accounts, social media access enables scam message campaigns, and e-commerce access enables fraudulent purchases. Identity theft escalates when personal information found in email inboxes is used to open new credit lines or file fraudulent tax returns. For busines email accounts in the dump, corporate espionage and BEC fraud are also realistic outcomes.

What Is a Stealer Log Operation Like Napoleon Corp

Organized stealer log operations like Napoleon Corp operate similarly to legitimate software businesses, except their product is stolen credentails. They maintain consistent branding, distribute malware through phishing campaigns and malicious downloads, collect credentials from infected machines globally, and batch-package the results for sale or distribution on Telegram and dark web forums. The "UP 416" designation in this file name likely refers to an upload batch number, suggesting this is one of hundreds of similar files this operation has produced. Buying access to these channels can cost anywhere from a few dollars to hundreds, making this data accessible to even low-skilled attackers.

Protect Yourself: Check If Your Credentials Are in the Napoleon Corp Dump

HEROIC's free breach scanner searches over 400 billion exposed records, including stealer logs from organized operations like Napoleon Corp. Enter your email address to instantly see whether your credentials have been compromised and what steps you should take to secure your accounts. Run a free scan at HEROIC before attackers use your data to drain your accouts and connected services.