## If you are on a 64 bit platform, everything should be running
## in 64 bit mode. This rule will detect any use of the 32 bit syscalls
## because this might be a sign of someone exploiting a hole in the 32
## bit API.
-a always,exit -F arch=b32 -S all -F key=32bit-abi

## Executions.
-a always,exit -F arch=b64 -S execve,execveat -k exec

## Identity changes.
-w /etc/group -p wa -k identity
-w /etc/passwd -p wa -k identity
-w /etc/gshadow -p wa -k identity

## Unauthorized access attempts.
-a always,exit -F arch=b64 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EACCES -k access
-a always,exit -F arch=b64 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EPERM -k access