Thailand Corp Stealer Log: 1,059 Emails and Passwords Leaked

During routine threat intelligence monitoring in February 2026, HEROIC analysts discovered a stealer log file posted to a Telegram channel. Labeled "THAILAND CORP-OTHERS-PRO MAILS TEST SAMPLE," the file contained 1,059 individual records. Each record included an email address, the corresponding plaintext password, and the URL of the website where the login took place. The credentials were harvested from real browsing sessions on infected devices.

Why This Data Gives Attackers a Direct Path Into Accounts

Unlike breaches where passwords are hashed or encrypted, every credential in this stealer log is stored in plaintext. An attacker does not need specialized tools or computing power to use them. They can read the password, visit the URL listed in the record, and attempt to log in immediately. The combination of email, password, and target site makes each record a complete package for account compromise.

Because these credentials were captured from active sessions on real devices, they represent passwords that were working at the time of theft. Many may still be valid if the affected users have not changed them since the malware captured their data.

What Was Exposed

• Email Addresses - Login identifiers tied to personal, professional, and financial services
• Plaintext Passwords - Unprotected passwords exactly as users typed them during login
• URLs - Specific website login pages where the credentials were recorded by malware

Why Credential Stuffing Makes This Worse

Attackers rarely stop at the single account listed in a stealer log entry. They take each email and password pair and run it through automated tools that try the same combination on hundreds of other services. This attack, known as credential stuffing, exploits the widespread habit of password reuse. If you use the same password for your email, your bank, and your social media, one stolen credential opens all three.

The downstream effects include unauthorized purchases, drained bank accounts, hijacked social media profiles, and stolen personal information that can be used for identity fraud over months or years.

How Infostealer Malware Collects Your Credentials

Stealer logs are produced by infostealer malware that infiltrates devices through multiple vectors. Common infection methods include downloading cracked software, opening malicious email attachments, and visiting compromised websites that deliver drive-by downloads. The malware runs quietly in the background, capturing browser-stored passwords and recording new credentials as the user types them.

Once the malware has collected enough data, it bundles the stolen credentials into a log file and transmits it to a remote server controlled by the attacker. These files then circulate through Telegram groups and underground markets where buyers use them for targeted account takeover campaigns.

Check If You Are Affected

This stealer log has been added to HEROIC's database of over 400 billion compromised records. HEROIC offers a free breach scanner that lets you search for your email address across all indexed breaches and stealer logs. If your credentials appear in this or any other dataset, you will know which accounts need immediate attention so you can change passwords and strengthen your security before attackers exploit the data.