diff --git a/rules/falco_rules.yaml b/rules/falco_rules.yaml index 2e390cd4..6fc7740a 100644 --- a/rules/falco_rules.yaml +++ b/rules/falco_rules.yaml @@ -3218,3 +3218,21 @@ # Application rules have moved to application_rules.yaml. Please look # there if you want to enable them by adding to # falco_rules.local.yaml. + +- list: proc_environ_file_names + items: [/proc/self/environ, /proc/1/environ] + +- macro: proc_environ_files + condition: > + fd.name in (proc_environ_file_names) + +- rule: Read environment variable from /proc files + desc: An attempt to read process environment variables from /proc files + condition: > + container and open_read and proc_environ_files + enabled: true + output: > + Environment variables were retrieved from /proc files (user=%user.name user_loginuid=%user.loginuid program=%proc.name + command=%proc.cmdline file=%fd.name parent=%proc.pname gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] container_id=%container.id image=%container.image.repository) + priority: WARNING + tags: [filesystem, mitre_credential_access, mitre_discovery]