[metadata]
creation_date = "2020/12/04"
maturity = "production"
updated_date = "2021/03/03"

[rule]
author = ["Elastic"]
description = "Identifies attempts to enumerate hosts in a network using the built-in Windows net.exe tool."
from = "now-9m"
index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Windows Network Enumeration"
risk_score = 47
rule_id = "7b8bfc26-81d2-435e-965c-d722ee397ef1"
severity = "medium"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Discovery"]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where event.type in ("start", "process_started") and
  ((process.name : "net.exe" or process.pe.original_file_name == "net.exe") or
   ((process.name : "net1.exe" or process.pe.original_file_name == "net1.exe") and
       not process.parent.name : "net.exe")) and
  (process.args : "view" or (process.args : "time" and process.args : "\\\\*"))


  /* expand when ancestry is available
  and not descendant of [process where event.type == ("start", "process_started") and process.name : "cmd.exe" and
                           ((process.parent.name : "userinit.exe") or
                            (process.parent.name : "gpscript.exe") or
                            (process.parent.name : "explorer.exe" and
                               process.args : "C:\\*\\Start Menu\\Programs\\Startup\\*.bat*"))]
  */
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1018"
name = "Remote System Discovery"
reference = "https://attack.mitre.org/techniques/T1018/"

[[rule.threat.technique]]
id = "T1135"
name = "Network Share Discovery"
reference = "https://attack.mitre.org/techniques/T1135/"


[rule.threat.tactic]
id = "TA0007"
name = "Discovery"
reference = "https://attack.mitre.org/tactics/TA0007/"