One has to compare the binary version which is currently running at the Kubernetes master and later on find out the PID of kubelet process. At the very end - simply run sha512sum /proc/<11111>/root/bin/kubelet. Compare it with the official kubernetes binary downloadeb by wget ...

kubectl get pods
kubectl get nodes
wget https://dl.k8s.io/v1.23.1/kubernetes-server-linux-amd64.tar.gz
tar -xvzf *.tar.gz

sha512sum kubernetes/server/bin/kubelet | cut -d" " -f1 > compare
ps -ef | grep kubelet
sha512sum /proc/23213/root/bin/kubelet | cut -d" " -f 1 >> compare
cat compare  | uniq
echo DIFFERENT > /answer