“While most schools are not cash-rich, they are very highly visible targets with immediate widespread impact in their communities. The pressure to keep the doors open and respond to calls from parents to ‘do something’ likely leads to pressure to solve the problem as quickly as possible without regard for cost. Unfortunately, the data doesn’t support that paying ransoms resolves these attacks more quickly, but it is likely a factor in victim selection for the criminals,” said Chester Wisniewski, field CTO, Sophos.
For the education sector, the root causes of ransomware attacks were similar to those across all sectors, but there was a significantly greater number of ransomware attacks involving compromised credentials for both higher-ed and K-12 educational organizations (37 percent and 36 percent respectively versus 29 percent for the cross-sector average).
Additional key findings from the report include:
- Exploits and compromised credentials accounted for more than three-fourths (77 percent) of ransomware attacks against higher-ed organizations; these root causes accounted for more than two-thirds (65 percent) of attacks against K-12 educational organizations
- The rate of encryption stayed about the same for higher-ed organizations (74 percent in 2021 versus 73 percent in 2022), but increased from 72 percent to 81 percent across K-12 educational organizations during the past year
- Higher-ed organizations reported a lower rate of using backups than the cross-sector average (63 percent versus 70 percent). This is the third lowest rate of backup use across all sectors. K-12 educational organizations, on the other hand, had a slightly higher rate of using backups than the global average (73 percent)
“Abuse of stolen credentials is common across sectors for ransomware criminals, but the lack of adoption of multifactor authentication (MFA) technology in the education sector makes them even more at risk of this method of compromise. Like the U.S. federal government’s initiative to mandate all agencies use MFA, it is time for schools of all sizes to employ MFA for faculty, staff and students. It sets a good example and is a simple way to avoid many of these attacks from getting in the door,” said Wisniewski.
Sophos recommends the following best practices to help defend against ransomware and other cyberattacks:
- Strengthen defensive shields with:
- Security tools that defend against the most common attack vectors, including endpoint protection with strong anti-exploit capabilities to prevent exploitation of vulnerabilities, and Zero Trust Network Access (ZTNA) to thwart the abuse of compromised credentials
- Adaptive technologies that respond automatically to attacks, disrupting adversaries and buying defenders time to respond
- 24/7 threat detection, investigation and response, whether delivered in-house or by a specialist Managed Detection and Response (MDR) provider
- Optimize attack preparation, including making regular backups, practicing recovering data from backups and maintaining an up-to-date incident response plan
- Maintain good security hygiene, including timely patching and regularly reviewing security tool configurations
This press release originally appeared online.
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