[metadata]
creation_date = "2020/11/03"
maturity = "production"
updated_date = "2020/11/03"

[rule]
author = ["Elastic"]
description = """
Identifies the use of Distributed Component Object Model (DCOM) to execute commands from a remote host, which are
launched via the HTA Application COM Object. This behavior may indicate an attacker abusing a DCOM application to move
laterally while attempting to evading detection.
"""
from = "now-9m"
index = ["winlogbeat-*", "logs-endpoint.events.*"]
language = "eql"
license = "Elastic License"
name = "Incoming DCOM Lateral Movement via MSHTA"
references = ["https://codewhitesec.blogspot.com/2018/07/lethalhta.html"]
risk_score = 73
rule_id = "622ecb68-fa81-4601-90b5-f8cd661e4520"
severity = "high"
tags = ["Elastic", "Host", "Windows", "Threat Detection", "Lateral Movement"]
type = "eql"

query = '''
sequence with maxspan=1m
  [process where event.type in ("start", "process_started") and
     process.name : "mshta.exe" and process.args : "-Embedding"
  ] by host.id, process.entity_id
  [network where event.type == "start" and process.name : "mshta.exe" and 
     network.direction == "incoming" and network.transport == "tcp" and
     source.port > 49151 and destination.port > 49151 and not source.address in ("127.0.0.1", "::1")
  ] by host.id, process.entity_id
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1021"
name = "Remote Services"
reference = "https://attack.mitre.org/techniques/T1021/"


[rule.threat.tactic]
id = "TA0008"
name = "Lateral Movement"
reference = "https://attack.mitre.org/tactics/TA0008/"
