QuickBooks popup scam still being delivered via Google ads

**Malvertising campaign delivering fake QuickBooks installer:** A malicious Google ad lures users to download a Dropbox-hosted QuickBooks_Installer.msi that installs the legitimate QuickBooks alongside a .NET backdoor (zeform.exe). The backdoor periodically displays fake error popups to frighten victims into calling a fraudulent support number and enabling remote access; the report includes behavioral analysis and IOCs (domain, filenames, SHA256 hashes).