[metadata]
creation_date = "2024/08/29"
integration = ["endpoint", "windows", "system", "sentinel_one_cloud_funnel", "m365_defender"]
maturity = "production"
min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
min_stack_version = "8.13.0"
updated_date = "2024/09/17"

[rule]
author = ["Elastic"]
description = """
Identifies the Foxmail client spawning a child process with argument pointing to the Foxmail temp directory. 
This may indicate the successful exploitation of a Foxmail vulnerability for initial access and execution via 
a malicious email.
"""
from = "now-9m"
index = [
    "winlogbeat-*",
    "logs-windows.*",
    "endgame-*",
    "logs-system.security*",
    "logs-windows.sysmon_operational-*",
    "logs-sentinel_one_cloud_funnel.*",
    "logs-m365_defender.event-*", 
    "logs-endpoint.events.process-*"
]
language = "eql"
license = "Elastic License v2"
name = "Potential Foxmail Exploitation"
references = ["https://mp.weixin.qq.com/s/F8hNyESBdKhwXkQPgtGpew"]
risk_score = 73
rule_id = "2c6a6acf-0dcb-404d-89fb-6b0327294cfa"
severity = "high"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Initial Access",
    "Tactic: Execution",
    "Data Source: Elastic Defend",
    "Data Source: Sysmon", 
    "Data Source: System", 
    "Data Source: Elastic Endgame",
    "Data Source: SentinelOne",
    "Data Source: Microsoft Defender for Endpoint"
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
process where host.os.type == "windows" and event.type == "start" and 
 process.parent.name : "Foxmail.exe" and process.args : ("?:\\Users\\*\\AppData\\*", "\\\\*")

'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1203"
name = "Exploitation for Client Execution"
reference = "https://attack.mitre.org/techniques/T1203/"


[rule.threat.tactic]
id = "TA0002"
name = "Execution"
reference = "https://attack.mitre.org/tactics/TA0002/"
[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1189"
name = "Drive-by Compromise"
reference = "https://attack.mitre.org/techniques/T1189/"


[rule.threat.tactic]
id = "TA0001"
name = "Initial Access"
reference = "https://attack.mitre.org/tactics/TA0001/"