Potential Proxy Execution via Sed

[rule]
description = """
This rule detects the execution of a command or binary through the Sed binary. Attackers may use this technique to
execute commands while attempting to evade detection.
"""
id = "272cf3e7-fd3f-442b-a781-f9e864fb1d4c"
license = "Elastic License v2"
name = "Potential Proxy Execution via Sed"
os_list = ["linux"]
reference = ["https://gtfobins.github.io/gtfobins/sed/"]
version = "1.0.4"

query = '''
sequence with maxspan=3s
  [process where event.type == "start" and event.action == "exec" and process.parent.name == "sed" and
   process.parent.args == "-n" and not process.args like "s/*"] by process.entity_id
  [process where event.type == "start" and event.action == "exec" and
   process.parent.name in ("bash", "dash", "sh", "tcsh", "csh", "zsh", "ksh", "fish") and
   process.parent.args == "-c"] by process.parent.entity_id
'''

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 = "T1218"
name = "System Binary Proxy Execution"
reference = "https://attack.mitre.org/techniques/T1218/"


[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"

[internal]
min_endpoint_version = "7.15.0"