[metadata]
creation_date = "2023/05/12"
integration = ["cloud_defend"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
description = """
This rule detects interactive 'exec' events launched against a container using the 'exec' command. Using the 'exec'
command in a pod allows a user to establish a temporary shell session and execute any process/command inside the
container. This rule specifically targets higher-risk interactive commands that allow real-time interaction with a
container's shell. A malicious actor could use this level of access to further compromise the container environment or
attempt a container breakout.
"""
false_positives = [
    """
    An administrator may need to exec into a pod for a legitimate reason like debugging purposes. Containers built from
    Linux and Windows OS images, tend to include debugging utilities. In this case, an admin may choose to run commands
    inside a specific container with kubectl exec ${POD_NAME} -c ${CONTAINER_NAME} -- ${CMD} ${ARG1} ${ARG2} ...
    ${ARGN}. For example, the following command can be used to look at logs from a running Cassandra pod: kubectl exec
    cassandra --cat /var/log/cassandra/system.log . Additionally, the -i and -t arguments might be used to run a shell
    connected to the terminal: kubectl exec -i -t cassandra -- sh
    """,
]
from = "now-6m"
index = ["logs-cloud_defend*"]
interval = "5m"
language = "eql"
license = "Elastic License v2"
name = "Interactive Exec Command Launched Against A Running Container"
references = [
    "https://kubernetes.io/docs/tasks/debug/debug-application/debug-running-pod/",
    "https://kubernetes.io/docs/tasks/debug/debug-application/get-shell-running-container/",
]
risk_score = 73
rule_id = "420e5bb4-93bf-40a3-8f4a-4cc1af90eca1"
severity = "high"
tags = [
    "Data Source: Elastic Defend for Containers",
    "Domain: Container",
    "OS: Linux",
    "Use Case: Threat Detection",
    "Tactic: Execution",
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where container.id : "*" and event.type== "start" and 

/* use of kubectl exec to enter a container */
process.entry_leader.entry_meta.type : "container" and 

/* process is the inital process run in a container */
process.entry_leader.same_as_process== true and

/* interactive process */
process.interactive == true
'''


[[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.technique]]
id = "T1609"
name = "Container Administration Command"
reference = "https://attack.mitre.org/techniques/T1609/"


[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"