Always scan downloaded .exe files with VirusTotal. Malicious actors have repackaged Flashtool with keyloggers. Validate the SHA-256 hash against known clean copies mentioned in XDA threads.
Flashtool is a popular software tool used for flashing firmware on various Sony Xperia devices. The latest version, v0.8.6.0.22, has been released, and this report aims to provide a comprehensive overview of the new features, improvements, and changes. Flashtool v0.8.6.0. 22