[rule]
description = """
Detects when the tc (traffic control) binary is utilized to set a BPF (Berkeley Packet Filter) on a network interface.
Tc is used to configure Traffic Control in the Linux kernel. It can shape, schedule, police and drop traffic. A threat
actor can utilize tc to set a bpf filter on an interface for the purpose of manipulating the incoming traffic. This
technique is not at all common and should indicate abnormal, suspicious or malicious activity.
"""
id = "bde36476-0c2c-40df-b3b1-941b0b31e444"
license = "Elastic License v2"
name = "BPF Filter Applied using Traffic Control"
os_list = ["linux"]
version = "1.0.1"
query = '''
process where event.type == "start" and event.action == "exec" and process.name == "tc" and
process.args == "filter" and process.args == "add" and process.args == "bpf" and
not process.parent.executable == "/usr/sbin/libvirtd"
'''
min_endpoint_version = "7.15.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 0
[[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 = "T1562"
name = "Impair Defenses"
reference = "https://attack.mitre.org/techniques/T1562/"
[[threat.technique.subtechnique]]
id = "T1562.001"
name = "Disable or Modify Tools"
reference = "https://attack.mitre.org/techniques/T1562/001/"
[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
[internal]
min_endpoint_version = "7.15.0"