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chore: remove exe_flags=%evt.arg.flags output from each non spawned_process rule #217

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Jan 11, 2024
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chore: remove exe_flags=%evt.arg.flags output from each non spawned_process rule #217

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16 changes: 8 additions & 8 deletions rules/falco-incubating_rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -265,7 +265,7 @@
and not proc.name in (shell_binaries)
and not exe_running_docker_save
and not user_known_shell_config_modifiers
output: A shell configuration file has been modified (file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: A shell configuration file has been modified (file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority:
WARNING
tags: [maturity_incubating, host, container, filesystem, mitre_persistence, T1546.004]
Expand All @@ -281,7 +281,7 @@
((open_write and fd.name startswith /etc/cron) or
(spawned_process and proc.name = "crontab"))
and not user_known_cron_jobs
output: Cron jobs were scheduled to run (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Cron jobs were scheduled to run (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority:
NOTICE
tags: [maturity_incubating, host, container, filesystem, mitre_execution, T1053.003]
Expand Down Expand Up @@ -377,7 +377,7 @@
and (user_ssh_directory or fd.name startswith /root/.ssh)
and not user_known_read_ssh_information_activities
and not proc.name in (ssh_binaries)
output: ssh-related file/directory read by non-ssh program (file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: ssh-related file/directory read by non-ssh program (file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_incubating, host, container, filesystem, mitre_collection, T1005]

Expand Down Expand Up @@ -456,7 +456,7 @@
evt.type=unshare and evt.dir=<
and container
and not thread.cap_permitted contains CAP_SYS_ADMIN
output: Change namespace privileges via unshare (res=%evt.res evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
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output: Change namespace privileges via unshare (res=%evt.res evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: NOTICE
tags: [maturity_incubating, container, mitre_privilege_escalation, T1611]

Expand Down Expand Up @@ -864,7 +864,7 @@
and not fd.name in (allowed_dev_files)
and not fd.name startswith /dev/tty
and not user_known_create_files_below_dev_activities
output: File created below /dev by untrusted program (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: File created below /dev by untrusted program (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_incubating, host, filesystem, mitre_persistence, T1543]

Expand Down Expand Up @@ -1203,7 +1203,7 @@
and container
and (fd.name glob /proc/*/environ)
and not proc.name in (known_binaries_to_read_environment_variables_from_proc_files)
output: Environment variables were retrieved from /proc files (file=%fd.name gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Environment variables were retrieved from /proc files (file=%fd.name gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: WARNING
tags: [maturity_incubating, container, filesystem, process, mitre_discovery, T1083]

Expand Down Expand Up @@ -1242,7 +1242,7 @@
and container_entrypoint
and proc.tty=0
and not system_level_side_effect_artifacts_kubectl_cp
output: Exfiltrating Artifacts via Kubernetes Control Plane (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Exfiltrating Artifacts via Kubernetes Control Plane (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: NOTICE
tags: [maturity_incubating, container, filesystem, mitre_exfiltration, TA0010]

Expand All @@ -1259,7 +1259,7 @@
and (user_ssh_directory or fd.name startswith /root/.ssh)
and fd.name endswith authorized_keys
and not proc.name in (ssh_binaries)
output: Adding ssh keys to authorized_keys (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags)
output: Adding ssh keys to authorized_keys (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty)
priority: WARNING
tags: [maturity_incubating, host, filesystem, mitre_persistence, T1098.004]

Expand Down
18 changes: 9 additions & 9 deletions rules/falco-sandbox_rules.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -312,7 +312,7 @@
fd.directory in (shell_config_directories))
and not proc.name in (shell_binaries)
enabled: false
output: A shell configuration file was read by a non-shell program (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: A shell configuration file was read by a non-shell program (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority:
WARNING
tags: [maturity_sandbox, host, container, filesystem, mitre_discovery, T1546.004]
Expand Down Expand Up @@ -601,7 +601,7 @@
and not package_mgmt_ancestor_procs
and not exe_running_docker_save
and not user_known_update_package_registry
output: Repository files get updated (newpath=%evt.arg.newpath file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Repository files get updated (newpath=%evt.arg.newpath file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority:
NOTICE
tags: [maturity_sandbox, host, container, filesystem, mitre_execution, T1072]
Expand All @@ -626,7 +626,7 @@
and not python_running_get_pip
and not python_running_ms_oms
and not user_known_write_below_binary_dir_activities
output: File below a known binary directory opened for writing (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: File below a known binary directory opened for writing (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_sandbox, host, container, filesystem, mitre_persistence, T1543]

Expand Down Expand Up @@ -681,7 +681,7 @@
and not google_accounts_daemon_writing_ssh
and not cloud_init_writing_ssh
and not user_known_write_monitored_dir_conditions
output: File below a monitored directory opened for writing (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: File below a monitored directory opened for writing (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_sandbox, host, container, filesystem, mitre_persistence, T1543]

Expand Down Expand Up @@ -971,7 +971,7 @@
profiling of your environment can transform this rule into an effective rule for detecting unusual behavior associated with system
changes, including compliance-related cases.
condition: write_etc_common
output: File below /etc opened for writing (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: File below /etc opened for writing (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_sandbox, host, container, filesystem, mitre_persistence, T1098]

Expand Down Expand Up @@ -1074,7 +1074,7 @@
and not known_root_conditions
and not user_known_write_root_conditions
and not user_known_write_below_root_activities
output: File below / or /root opened for writing (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: File below / or /root opened for writing (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_sandbox, host, container, filesystem, mitre_persistence, TA0003]

Expand Down Expand Up @@ -1103,7 +1103,7 @@
and not exe_running_docker_save
and not amazon_linux_running_python_yum
and not user_known_write_rpm_database_activities
output: rpm database opened for writing by a non-rpm program (file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: rpm database opened for writing by a non-rpm program (file=%fd.name pcmdline=%proc.pcmdline evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_sandbox, host, container, filesystem, software_mgmt, mitre_persistence, T1072]

Expand Down Expand Up @@ -1583,7 +1583,7 @@
and not runc_writing_var_lib_docker
and not user_known_container_drift_activities
enabled: false
output: Drift detected (open+create), new executable created in a container (filename=%evt.arg.filename name=%evt.arg.name mode=%evt.arg.mode evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Drift detected (open+create), new executable created in a container (filename=%evt.arg.filename name=%evt.arg.name mode=%evt.arg.mode evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: ERROR
tags: [maturity_sandbox, container, process, filesystem, mitre_execution, T1059]

Expand Down Expand Up @@ -1694,7 +1694,7 @@
and not docker_procs
and not proc.cmdline = "runc:[1:CHILD] init"
enabled: false
output: Detect Potential Container Breakout Exploit (CVE-2019-5736) (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Detect Potential Container Breakout Exploit (CVE-2019-5736) (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: WARNING
tags: [maturity_sandbox, container, filesystem, mitre_initial_access, T1611]

Expand Down
10 changes: 5 additions & 5 deletions rules/falco_rules.yaml
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -329,7 +329,7 @@
and directory_traversal
and not proc.pname in (shell_binaries)
enabled: true
output: Read monitored file via directory traversal (file=%fd.name fileraw=%fd.nameraw gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Read monitored file via directory traversal (file=%fd.name fileraw=%fd.nameraw gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: WARNING
tags: [maturity_stable, host, container, filesystem, mitre_credential_access, T1555]

Expand All @@ -355,7 +355,7 @@
and not proc_is_new
and proc.name!="sshd"
and not user_known_read_sensitive_files_activities
output: Sensitive file opened for reading by trusted program after startup (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Sensitive file opened for reading by trusted program after startup (file=%fd.name pcmdline=%proc.pcmdline gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: WARNING
tags: [maturity_stable, host, container, filesystem, mitre_credential_access, T1555]

Expand Down Expand Up @@ -427,7 +427,7 @@
and not linux_bench_reading_etc_shadow
and not user_known_read_sensitive_files_activities
and not user_read_sensitive_file_containers
output: Sensitive file opened for reading by non-trusted program (file=%fd.name gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Sensitive file opened for reading by non-trusted program (file=%fd.name gparent=%proc.aname[2] ggparent=%proc.aname[3] gggparent=%proc.aname[4] evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: WARNING
tags: [maturity_stable, host, container, filesystem, mitre_credential_access, T1555]

Expand Down Expand Up @@ -938,7 +938,7 @@
and not containerd_activities
and not trusted_logging_images
and not allowed_clear_log_files
output: Log files were tampered (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Log files were tampered (file=%fd.name evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority:
WARNING
tags: [maturity_stable, host, container, filesystem, mitre_defense_evasion, T1070, NIST_800-53_AU-10]
Expand Down Expand Up @@ -1080,7 +1080,7 @@
and fd.name endswith release_agent
and (user.uid=0 or thread.cap_effective contains CAP_DAC_OVERRIDE)
and thread.cap_effective contains CAP_SYS_ADMIN
output: Detect an attempt to exploit a container escape using release_agent file (file=%fd.name cap_effective=%thread.cap_effective evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty exe_flags=%evt.arg.flags %container.info)
output: Detect an attempt to exploit a container escape using release_agent file (file=%fd.name cap_effective=%thread.cap_effective evt_type=%evt.type user=%user.name user_uid=%user.uid user_loginuid=%user.loginuid process=%proc.name proc_exepath=%proc.exepath parent=%proc.pname command=%proc.cmdline terminal=%proc.tty %container.info)
priority: CRITICAL
tags: [maturity_stable, container, process, mitre_privilege_escalation, T1611]

Expand Down
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