openstm32.org Infected? or false positive
The destination IP is in a blacklist?
http://ipindetail.com/ip-lookup/91.121.88.118.html
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Development tools for Zephyr on STM32
Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.
Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.