Winsage
April 16, 2026
A malware campaign is utilizing counterfeit Proton VPN websites and other deceptive tactics to distribute a Windows infostealer known as NWHStealer. This malware extracts sensitive information, including browser credentials and cryptocurrency wallet details, and operates stealthily by injecting itself into legitimate processes. Two primary infection vectors have been identified: malicious ZIP archives on a free web hosting platform and trojanized installers from fake Proton VPN sites. The malware employs DLL hijacking and can exfiltrate data to a command-and-control server while ensuring persistence through scheduled tasks and disguising payloads as legitimate system processes. It also exploits the Windows cmstp.exe utility to bypass User Account Control. Users are advised to avoid downloading software from unofficial sources and to verify file signatures and publisher information.
