[rule]
description = """
Identifies the sequence of a file creation event followed by a process start event for netcat. This may indicate that a
file listener has been established using netcat, which is often used for lateral movement or data exfiltration.
"""
id = "b3ab4040-1289-4a8a-959a-bb71c9b09afe"
license = "Elastic License v2"
name = "Potential Netcat File Listener Established"
os_list = ["linux"]
version = "1.0.7"
query = '''
sequence by process.entity_id with maxspan=5s
[file where event.type == "creation" and file.path like (
"/tmp/*", "/var/tmp/*", "/dev/shm/*", "/home/*", "/root/*"
)]
[process where event.type == "start" and event.action == "exec" and
process.name in ("nc", "ncat", "netcat", "netcat.openbsd", "netcat.traditional", "nc.openbsd", "nc.traditional") and
not (
process.command_line like ("*127.0.0.1*", "*localhost*") or
process.args like "-*z*"
)]
'''
min_endpoint_version = "7.15.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 1
[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 0
[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 1
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1059"
name = "Command and Scripting Interpreter"
reference = "https://attack.mitre.org/techniques/T1059/"
[[threat.technique.subtechnique]]
id = "T1059.004"
name = "Unix Shell"
reference = "https://attack.mitre.org/techniques/T1059/004/"
[threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1570"
name = "Lateral Tool Transfer"
reference = "https://attack.mitre.org/techniques/T1570/"
[threat.tactic]
id = "TA0008"
name = "Lateral Movement"
reference = "https://attack.mitre.org/tactics/TA0008/"
[internal]
min_endpoint_version = "7.15.0"