[metadata]
creation_date = "2020/10/27"
deprecation_date = "2023/12/15"
integration = ["endpoint", "windows"]
maturity = "deprecated"
min_stack_comments = "New fields added: required_fields, related_integrations, setup"
min_stack_version = "8.3.0"
updated_date = "2023/12/15"

[rule]
author = ["Elastic"]
description = """
Identifies process execution followed by a file overwrite of an executable by the same parent process. This may indicate
an evasion attempt to execute malicious code in a stealthy way.
"""
from = "now-9m"
index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
language = "eql"
license = "Elastic License v2"
name = "Potential Process Herpaderping Attempt"
references = ["https://github.com/jxy-s/herpaderping"]
risk_score = 73
rule_id = "ccc55af4-9882-4c67-87b4-449a7ae8079c"
severity = "high"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Defense Evasion",
    "Data Source: Elastic Defend",
]
type = "eql"

query = '''
sequence with maxspan=5s
   [process where host.os.type == "windows" and event.type == "start" and not process.parent.executable :
      (
         "?:\\Windows\\SoftwareDistribution\\*.exe",
         "?:\\Program Files\\Elastic\\Agent\\data\\*.exe",
         "?:\\Program Files (x86)\\Trend Micro\\*.exe"
      )
   ] by host.id, process.executable, process.parent.entity_id
   [file where host.os.type == "windows" and event.type == "change" and event.action == "overwrite" and file.extension == "exe"] by host.id, file.path, process.entity_id
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1036"
name = "Masquerading"
reference = "https://attack.mitre.org/techniques/T1036/"


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