The LOGSYNC VALENCIGA Traffic Log Leaked 5,285 Plaintext Logins

HEROIC analysts identified a stealer log file tied to a service called VALENCIGA, referencing buy-traffic and live-log operations, uploaded to a Telegram channel through the LOGSYNC group on May 27, 2025. The file contains 5,285 records made up of email addresses, plaintext passwords, and the URLs those credentials were used to log into.

Why This Is Dangerous

Because the passwords in this log are stored in plaintext and directly paired with a URL, an attacker does not need to crack or guess anything. They can open the file and immediately log in as the victim on the exact site each credential belongs to, whether that is a traffic or marketing platform, an email account, or something else entirely.

What Was Exposed in the VALENCIGA Traffic Log

• Email addresses tied to infected devices
• Plaintext passwords, stored with no encryption
• URLs identifying which sites and services each login belongs to

Why This Matters

People who used services related to web traffic buying and marketing operations often manage several linked accounts, from ad platforms to payment processors. If credentials from this log match logins used elsewhere, attackers can use them for credential stuffing, leading to account takeover, identity theft, or financial fraud against anyone whose information appears in the 5,285 exposed records.

How Stealer Logs Work

A stealer log is generated by malware that infects a device, often through a fake download, cracked software, or a malicious ad. Once installed, it quietly pulls saved logins and browsing data straight out of the browser and sends everything back to the attacker. That information is packaged into a log file, like this VALENCIGA-related dump, and shared or sold through Telegram channels such as LOGSYNC. Because the malware grabs whatever is saved on the device at once, a single infection can expose logins to many unrelated accounts.

Check If You Are Affected

If you use any traffic, marketing, or advertising platforms and are concerned your device may be infected with stealer malware, HEROIC's free breach scanner checks your email against a database of more than 400 billion leaked records. It takes seconds to find out if you are exposed and which passwords need to change right away.