Xenotime, the threat actor behind the 2017 Trisis/Triton malware attack, is now targeting — in addition to oil and gas organizations — electric utilities in the United States and the Asia-Pacific (APAC) region.
Xenotime has been active since at least 2014, but its existence only came to light in 2017 when it targeted an oil and gas plant in Saudi Arabia. The group used a piece of malware known as Trisis, Triton and HatMan, and it targeted Schneider Electric’s Triconex safety instrumented systems (SIS) through a zero-day vulnerability. The attack was discovered after a SIS triggered a shutdown of some industrial systems, which experts believe hackers caused by accident.
Xenotime initially appeared to target only the oil and gas sector in the Middle East, but Dragos reported in May 2018 that the hackers had started attacking organizations worldwide, including the United States, and safety systems other than Triconex.
In a blog post published on Friday, Dragos revealed that the threat group had been spotted targeting electric utilities in the United States and the APAC region through tactics similar to ones used against the oil and gas sector. Fortunately, the industrial cybersecurity firm said none of the attacks appeared to have resulted in a successful intrusion into the targeted organization.
“This behavior could indicate the activity group was preparing for a further cyberattack, or at minimum satisfying the prerequisites for a future ICS-focused intrusion,” Dragos wrote. “The activities are consistent with Stage 1 ICS Cyber Kill Chain reconnaissance and initial access operations, including observed incidents of attempted authentication with credentials and possible credential ‘stuffing,’ or using stolen usernames and passwords to try and force entry into target accounts.”
While Xenotime only appears to have used the Triton malware in the 2017 attack, Dragos has warned that the group can pose a serious threat to electric utilities, which also rely on safety systems that could be targeted using similar techniques.
“XENOTIME expressing consistent, direct interest in electric utility operations is a cause for deep concern given this adversary’s willingness to compromise process safety — and thus integrity — to fulfill its mission,” Dragos said.
FireEye has linked the threat group behind Triton to the Central Scientific Research Institute of Chemistry and Mechanics (CNIIHM), a technical research organization located in Moscow and owned by the Russian government.
FireEye revealed in April at SecurityWeek’s ICS Cyber Security Conference in Singapore that some of the pieces of digital evidence that led to researchers linking Triton to CNIIHM were removed after the information was made public.
Dragos presented research on Xenotime at SecurityWeek’s 2018 ICS Cyber Security Conference in Atlanta: