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IOT/OT NETWORK ADVERSARIES ADVANCE AMIDST BUG BARRAGE

Cyberattacks on critical infrastructure targeting IoT and OS networks are
increasing in sophistication, while ICS vulnerabilities surge, new data shows.

Becky Bracken, Editor, Dark Reading

February 8, 2024

2 Min Read
Source: Andrey Suslov via Alamy Stock Photo


New telemetry data from Internet of Things and operational technology networks
brings into sharp focus the risks associated with IoT and OT installations:
These networks are subject to highly sophisticated attacks, while in tandem, the
volume of vulnerabilities associated with each explodes. And consequently, IoT
and OT networks pose even greater risks than generally acknowledged.

Data from the last half of 2023 analyzed by Nozomi Networks showed the largest
portion of threats to IoT and OT networks were network anomalies and attacks,
with sophisticated tactics like TCP flood and network scans being most popular,
the company said in a new report.



"These trends should serve as a warning that attackers are adopting more
sophisticated methods to directly target critical infrastructure, and could be
indicative of rising global hostilities," Chris Grove, director of cybersecurity
strategy at Nozomi Networks, said in a statement about the new data. "The
significant uptick in anomalies could mean that the threat actors are getting
past the first line of defense while penetrating deeper than many would have
initially believed, which would require a high level of sophistication."



Meanwhile, tried-and-true IoT and OT cyberattack approaches like access control
and authorization threats, including brute force and multiple login attacks,
were up too — by 123%.

A bit of good news: There was a 12% dip in daily cyberattacks against IoT
devices during the last half of 2023.


VULNERABILITIES ADD TO IOT/OT THREAT



Piling additional cyber-risk onto IoT and OT network defenders was the mounting
number of vulnerabilities affecting industrial control systems (ICS) identified
by the Cybersecurity and Infrastructure Security Agency, which rose 38% over the
previous six months, the Nozomi Networks analysis added. Manufacturing
vulnerabilities dominated the CISA list, with a 230% increase in discoveries
over the previous half-year.

Similarly, the number of vendors impacted by CISA-reported ICS bugs was up by
19%.

Grove tells Dark Reading that it's unrealistic to think any network can be 100%
secure.

"That's why it's important to focus not only on security defenses but also adopt
a post-breach mentality," Grove adds. "To minimize risk and maximize operational
resiliency, prioritize strategies that include network segmentation, asset
discovery, vulnerability management, patching, logging, endpoint detection, and
threat intelligence."



Actionable asset and threat intelligence should also be part of the cyber
defense mix, Grove says.

"In an increasingly complex threat landscape, resiliency will be the key to
effective defenses," he adds.




ABOUT THE AUTHOR(S)

Becky Bracken, Editor, Dark Reading




See more from Becky Bracken, Editor, Dark Reading
Keep up with the latest cybersecurity threats, newly discovered vulnerabilities,
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