89K Email Users Hit by the UP_DaisyCloud Stealer Log on Telegram

HEROIC analysts detected the UP_DaisyCloud stealer log circulating through a Telegram channel on June 9, 2025. The dump, distributed by the operator known as .boxed.pw, contained 89,238 records pulled directly from devices infected with infostealer malware. Exposed data included email addresses, plaintext passwords, and homepage URLs tied to the victoms' active browser sessions at the time of infection. The speed at which this log surfaced on underground channels suggests it was prepared and staged for rapid distribution shortly after the malware campaign concluded.

Why Plaintext Passwords From a Stealer Log Are Especially Dangerous

Most breaches expose hashed passwords, which at least require crackers to do extra work. This log contained plaintext credentials, meaning anyone who downloaded the file had immediate, ready-to-use login pairs. An attacker does not need any technical skill to exploit this data. They simply copy the email and password into a login page and try it. Because most people reuse passwords across multiple services, a single exposed credential can unlock email inboxes, cloud storage, banking portals, and social media accounts in minutes.

What Was Exposed in the UP_DaisyCloud Telegram Log

• Email addresses (primary account identifiers)
• Plaintext passwords (no hashing, no protection)
• HomePage URLs (reveals which websites the victim was actively using)

Why This Matters: From One Stolen Password to Full Account Takeover

The combination of an email address, a plaintext password, and an active homepage URL is one of the most damaging credential sets a criminal can posess. The homepage URL tells an attacker exactly where the victim logs in regularly, turning a generic credential into a targeted attack plan. With this data, criminals can attempt credential stuffing across banking, e-commerce, and corporate platforms. If the victim uses the same password at work, the damage extends beyond personal accounts and into the organiaztion they work for. Identity theft becomes straightforward when an attacker controls your primary email, since most password-reset flows send recovery links directly to the inbox.

How Stealer Log Breaches Work

A stealer log is not a hack of a company's servers. It is the output of malware that runs silently on a real person's computer or phone. Infostealer malware typically arrives through a phishing email, a cracked software download, or a malicious browser extension. Once installed, it scans the device for saved passwords, active browser sessions, autofill data, and cookies. It packages all of this into a structured log file and sends it back to the attacker's server. Operators like .boxed.pw then sort, bundle, and distribute these logs through Telegram channels, often selling access to thousands of records for very little money. The victim rarely knows anything happened, because the malware leaves no visible trace on the screen.

Check If You Were Caught in the UP_DaisyCloud Breach

HEROIC's free breach scanner checks your email address against a database of over 400 billion exposed records, including stealer logs like this one. If your credentials appeared in the UP_DaisyCloud Telegram dump, or in any of thousands of other breaches, you will know within seconds. Run a free scan at HEROIC and find out exactly what data of yours is circulating on the dark web right now.