Summary
The Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), the (EPA), the Transportation Security Administration (TSA), the Department of Transportation (DOT), and the U.S. Department of Agriculture (USDA)—hereafter referred to as “the authoring organizations”—are aware of malicious cyber activity targeting U.S.-based automatic tank gauge (ATG) systems. ATG systems are widely used throughout the Energy, Chemical, Food and Agriculture, and Transportation Systems Sectors for automated and remote monitoring of storage tank parameters, including fuel and liquid levels, temperature, and possible leak detection. The authoring organizations urge ATG owners and operators to defend against this malicious activity by securing their ATG systems with strong passwords and by removing them from the internet to reduce public exposure. The recent malicious cyber activity observed by the authoring organizations—which the U.S. government has not yet attributed to a nation-state or threat actor group—involves cyber threat actors compromising internet-exposed ATG systems and subsequently modifying them through command execution.