Kernel Code Integrity Protection Based on a Virtualized Memory Architecture

Kernel rootkits pose significant challenges on defensive techniques as they run at the highest privilege level along with the protection systems. Modern architectural approaches such as the NX protection have been used in mitigating attacks, however determined attackers can still bypass these defenses with specifically crafted payloads. In this paper, we propose a virtualized Harvard memory architecture to address the kernel code integrity problem, which virtually separates the code fetch and data access on the kernel code to prevent kernel from code modifications. We have implemented the proposed mechanism in commodity operating system, and the experimental results show that our approach is effective and incurs very low overhead

Fast and Service-preserving Recovery from Malware Infections using CRIU

Once a computer system has been infected with malware, restoring it to an uninfected state often requires costly service-interrupting actions such as rolling back to a stable snapshot or reimaging the system entirely. We present CRIU-MR: a technique for restoring an infected server system running within a Linux container to an uninfected state in a service-preserving manner using Checkpoint/Restore in Userspace (CRIU). We modify the CRIU source code to flexibly integrate with existing malware detection technologies so that it can remove suspected malware processes within a Linux container during a checkpoint/restore event. This allows for infected containers with a potentially damaged filesystem to be checkpointed and subsequently restored on a fresh backup filesystem while both removing malware processes and preserving the state of trusted ones. This method can be quickly performed with minimal impact on service availability, restoring active TCP connections and completely removing several types of malware from infected Linux containers

Can Brazilian Jiu Jitsu be a Viable Treatment Option for Law Enforcement Officers with PTSD?

Law enforcement officers (LEO) are more likely to experience symptoms of PTSD when compared to the general population yet are less likely to seek mental health treatment (Jetelina et al., 2020). Given that LEO face unique occupational stressors and repeated exposure to traumatic events, treatment for PTSD among law enforcement populations poses unique challenges for clinicians. The combination of these variables precludes officers from seeking and receiving mental health services. Research regarding the efficacy of Brazilian Jiu Jitsu (BJJ) as a psychotherapeutic intervention is limited. To date, no studies have examined the use of BJJ to mitigate symptoms of PTSD among LEO. Through an extensive review of existing literature, this article takes a theoretical stance, advocating for further research into the possible psychotherapeutic benefits of BJJ for addressing symptoms of PTSD among LEOs. Based on existing literature, BJJ appears well suited to mitigate PTSD symptomology by facilitating increased self-regulation and fostering resiliency

Don't Daze, Phase, or Lase Me, Bro! Fourth Amendment Excessive-Force Claims, Future Nonlethal Weapons, and Why Requiring an Injury Cannot Withstand a Constitutional or Practical Challenge

This is the published version