Hackers suspected to work for the Chinese government have used a new malware called PortDoor to infiltrate the systems of an engineering company that designs submarines for the Russian Navy.
They used a spear-phishing email specifically crafted to lure the general director of the company into opening a malicious document.
The threat actor targeted Rubin Central Design Bureau for Marine Engineering in Saint Petersburg, a defense contractor that designed most of Russia’s nuclear submarines.
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Source: Bleeping Computer