Reveal a recent security report about a malicious campaign that exploits a fake desktop application named Claude Opus 5 Free Desktop to distribute RevStealer malware on Windows devices. The app is presented as offering free access to Claude, attempting to trick users and encourage them to install it voluntarily.

According to the report, RevStealer is not a typical data-stealing program, but a tool designed to operate quietly with the least possible traces. It searches browser databases and cookie files, as well as password manager records, targets VPN settings and remote access, messaging data, screenshots, and some selected documents.

More dangerous is that the software targets more than 50 cryptocurrency wallets, making it a direct threat to users who keep digital assets on their personal devices. According to the report, RevStealer was previously distributed via GitHub repositories and websites linked to cheating tools in games, before a new technique based on impersonating the name of a well-known AI application appeared.

How does the malware ensure it’s on a real device?

The researchers noted that RevStealer does not immediately begin its full activity. Instead, it first checks whether the device appears to be a real user’s device. These checks include available memory, the number of CPU cores, the device name, the user name, and graphics components. It also monitors delays associated with malware analysis environments.

If the malware detects anything unusual, it stops from moving to the next stages of infection. If the system passes these tests, the payload is decrypted, saved under a random name, and then run stealthily.

Practical steps to reduce risk

• Avoid downloading any desktop applications from untrusted links or from projects of unclear origin.

• Check the developer’s name and the publishing entity before installing, especially when there are promises of “free access.”

• Use multi-factor authentication on important accounts, especially your digital wallets.

• Keep digital asset wallets in a secure environment, and reduce storing passwords and sensitive files on the device itself.

• Monitor any unusual behavior in the browser or messaging apps, or remote access tools.

This warning comes at a time when malware campaigns targeting cryptocurrency investors are increasing, making it essential to verify the source of any app before installing it or granting permissions.

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