Disruptive attacks on critical infrastructure continue

“Over the past six months, cyberattacks have increased significantly, causing major disruption to industries ranging from transportation to healthcare,” said Roya Gordon, Nozomi Networks OT/IoT Security Research Evangelist. “Railways, in particular, have been subject to attacks, leading to the implementation of measures designed to protect rail operators and their assets. As cyber threats evolve and intensify, it is important for organizations to understand how threat actors are targeting OT/IoT and the actions required to defend critical assets from threat actors.”

Nozomi Networks Labs analysis of customers’ intrusion alerts over the last six months found weak/cleartext passwords and weak encryption were the top access threats to critical infrastructure environments. This was followed by brute force and DDoS attempts. Trojans were the most common malware detected targeting enterprise IT networks, Remote Access Tools (RATs) topped the malware targeting OT, and DDoS malware targeted IoT devices.

Malicious IoT botnet activity remained high and continued to rise in the second half of 2022. Nozomi Networks Labs uncovered growing security concerns as botnets continue to use default credentials in attempts to access IoT Devices.

From July to December 2022, Nozomi Networks honeypots found:

· Attacks spiked in July, October and December with more than 5,000 unique attacks in each of those months.

· The top attacker IP addresses were associated with China, the United States, South Korea and Taiwan.

· “root” and “admin” credentials are still most often used as a way for threat actors to gain initial access and escalate privileges once in the network.

On the vulnerability front, manufacturing and energy remained the most vulnerable industries followed by water/wastewater, healthcare and transportation systems. In the last six months of 2022:

· CISA released 218 Common Vulnerabilities and Exposures (CVEs) – down 61% from the first half of the year.

· 70 vendors were impacted – up 16% from the previous reporting period; and

· Affected products were also up 6% from the first half of 2022.