diff --git a/rules/linux/execution_egress_connection_from_entrypoint_in_container.toml b/rules/linux/execution_egress_connection_from_entrypoint_in_container.toml new file mode 100644 index 00000000000..63d52d93d78 --- /dev/null +++ b/rules/linux/execution_egress_connection_from_entrypoint_in_container.toml @@ -0,0 +1,77 @@ +[metadata] +creation_date = "2024/07/10" +integration = ["endpoint"] +maturity = "production" +updated_date = "2024/07/10" + +[rule] +author = ["Elastic"] +description = """ +This rule identifies a sequence of events where a process named `entrypoint.sh` is started in a container, followed by a +network connection attempt. This sequence indicates a potential egress connection from an entrypoint in a container. An +entrypoint is a command or script specified in the Dockerfile and executed when the container starts. Attackers can use +this technique to establish a foothold in the environment, escape from a container to the host, or establish persistence. +""" +from = "now-9m" +index = ["logs-endpoint.events.*"] +language = "eql" +license = "Elastic License v2" +name = "Egress Connection from Entrypoint in Container" +risk_score = 47 +rule_id = "c75d0c86-38d6-4821-98a1-465cff8ff4c8" +severity = "medium" +tags = [ + "Domain: Endpoint", + "Domain: Container", + "OS: Linux", + "Use Case: Threat Detection", + "Tactic: Execution", + "Data Source: Elastic Defend", +] +timestamp_override = "event.ingested" +type = "eql" +query = ''' +sequence by host.id with maxspan=3s + [process where host.os.type == "linux" and event.type == "start" and event.action == "exec" and + process.entry_leader.entry_meta.type == "container" and process.name == "entrypoint.sh"] by process.entity_id + [network where event.type == "start" and event.action == "connection_attempted" and not ( + destination.ip == null or destination.ip == "0.0.0.0" or cidrmatch( + destination.ip, "10.0.0.0/8", "127.0.0.0/8", "169.254.0.0/16", "172.16.0.0/12", "192.0.0.0/24", "192.0.0.0/29", + "192.0.0.8/32", "192.0.0.9/32", "192.0.0.10/32", "192.0.0.170/32", "192.0.0.171/32", "192.0.2.0/24", + "192.31.196.0/24", "192.52.193.0/24", "192.168.0.0/16", "192.88.99.0/24", "224.0.0.0/4", "100.64.0.0/10", + "192.175.48.0/24","198.18.0.0/15", "198.51.100.0/24", "203.0.113.0/24", "240.0.0.0/4", "::1", "FE80::/10", + "FF00::/8", "172.31.0.0/16" + ) + )] by process.parent.entity_id +''' + +[[rule.threat]] +framework = "MITRE ATT&CK" + +[[rule.threat.technique]] +id = "T1059" +name = "Command and Scripting Interpreter" +reference = "https://attack.mitre.org/techniques/T1059/" + +[[rule.threat.technique.subtechnique]] +id = "T1059.004" +name = "Unix Shell" +reference = "https://attack.mitre.org/techniques/T1059/004/" + +[rule.threat.tactic] +id = "TA0002" +name = "Execution" +reference = "https://attack.mitre.org/tactics/TA0002/" + +[[rule.threat]] +framework = "MITRE ATT&CK" + +[[rule.threat.technique]] +id = "T1611" +name = "Escape to Host" +reference = "https://attack.mitre.org/techniques/T1611/" + +[rule.threat.tactic] +id = "TA0004" +name = "Privilege Escalation" +reference = "https://attack.mitre.org/tactics/TA0004/" diff --git a/rules/linux/privilege_escalation_docker_escape_via_nsenter.toml b/rules/linux/privilege_escalation_docker_escape_via_nsenter.toml new file mode 100644 index 00000000000..ea2de502b4b --- /dev/null +++ b/rules/linux/privilege_escalation_docker_escape_via_nsenter.toml @@ -0,0 +1,50 @@ +[metadata] +creation_date = "2024/07/10" +integration = ["endpoint"] +maturity = "production" +updated_date = "2024/07/10" + +[rule] +author = ["Elastic"] +description = """ +This rule identifies a UID change event via `nsenter`. The `nsenter` command is used to enter a namespace, which is a +way to isolate processes and resources. Attackers can use `nsenter` to escape from a container to the host, which can +lead to privilege escalation and lateral movement. +""" +from = "now-9m" +index = ["logs-endpoint.events.process*"] +language = "eql" +license = "Elastic License v2" +name = "Docker Escape via Nsenter" +references = ["https://www.cyberark.com/resources/threat-research-blog/the-route-to-root-container-escape-using-kernel-exploitation"] +risk_score = 47 +rule_id = "5f3ab3ce-7b41-4168-a06a-68d2af8ebc88" +severity = "medium" +tags = [ + "Domain: Endpoint", + "Domain: Container", + "OS: Linux", + "Use Case: Threat Detection", + "Tactic: Privilege Escalation", + "Data Source: Elastic Defend", +] +timestamp_override = "event.ingested" +type = "eql" +query = ''' +process where host.os.type == "linux" and event.type == "change" and event.action == "uid_change" and +process.entry_leader.entry_meta.type == "container" and process.args == "nsenter" and +process.args in ("-t", "--target") and process.args_count >= 4 +''' + +[[rule.threat]] +framework = "MITRE ATT&CK" + +[[rule.threat.technique]] +id = "T1611" +name = "Escape to Host" +reference = "https://attack.mitre.org/techniques/T1611/" + +[rule.threat.tactic] +id = "TA0004" +name = "Privilege Escalation" +reference = "https://attack.mitre.org/tactics/TA0004/"