MegaCloud 18.11 Stealer Log Gave Hackers 835 Working Logins

HEROIC Analysts Flag the MegaCloud 18.11 Stealer Log

On November 18, 2024, HEROIC's threat intelligence team spotted a stealer log titled "FRESH HOT HITS By MEGACLOUD 18.11" uploaded to a Telegram channel by an anonymous user. The file contained 835 records, each combining an email address, a plaintext password, and the URL of the login page the credentials belonged to.

What Hackers Can Do With the MegaCloud 18.11 Data

Because this data comes directly from infected devices rather than a company's servers, every credential in the file was valid and in active use at the time it was stolen. An attacker who picks up this log has a ready-made list of working logins, complete with the exact website each one unlocks. That means no guesswork: they can go straight to the matching login page and try the credentials immediately, often using automated scripts that attempt hundreds of logins per minute.

What Was Exposed in the MegaCloud 18.11 Log

• Email addresses tied to individual accounts
• Plaintext passwords for those accounts
• The website URLs where each credential pair was used

Why This Matters for the 835 People Affected

The combination of a working password and its matching site URL is exactly what is needed for account takeover. Anyone among the 835 affected who reused this password elsewhere, on email, banking, or shopping accounts, faces a real risk of credential stuffing attacks, where hackers try the same login across many services hoping for a match.

How Stealer Logs Like MegaCloud 18.11 Are Built

This log is the product of infostealer malware, a type of infection typically delivered through pirated software, fake game cheats, or phishing links. Once installed, the malware quietly reads the passwords, autofill data, and saved logins stored in the victim's browser, then exports everything into a text file. Sellers on Telegram package logs like this one from many victims at once and circulate them for free or for sale, which is how MEGACLOUD 18.11 ended up public just days after the theft occurred.

Check If You Are Affected

Worried your credentials might be sitting in the MegaCloud 18.11 log or another stealer dump? HEROIC's free breach scanner checks your email against a database of more than 400 billion compromised records, so you can find out fast and reset any passwords that are still active before someone else uses them.