The protection in the runtime rule that would cause the audit message indicating "/bin/ls launched and is explicitly blocked in the runtime rule" is related to "Processes". In container security, a runtime rule set to monitor and restrict processes can block specific executables or commands from running within a container. If the rule is triggered, it indicates that a process that is explicitly denied by the policy attempted to execute, which in this case is the 'ls' command.

https://docs.paloaltonetworks.com/prisma/prisma-cloud/22-12/prisma-cloud-compute-edition-admin/runtime_defense/runtime_audits