[metadata]
creation_date = "2024/08/29"
integration = ["endpoint", "windows"]
maturity = "production"
updated_date = "2024/08/29"

[rule]
author = ["Elastic"]
description = """
Identifies the load of a remote library by the WPS Office promecefpluginhost.exe executable. This may indicate the successful 
exploitation of CVE-2024-7262 or CVE-2024-7263 via DLL hijack abusing the ksoqing custom protocol handler.
"""
from = "now-9m"
index = [ "logs-endpoint.events.library-*", "logs-windows.sysmon_operational-*"]
language = "eql"
license = "Elastic License v2"
name = "WPS Office Exploitation via DLL Hijack"
references = [
 "https://www.welivesecurity.com/en/eset-research/analysis-of-two-arbitrary-code-execution-vulnerabilities-affecting-wps-office/", 
 "https://mp.weixin.qq.com/s/F8hNyESBdKhwXkQPgtGpew"
 ]
risk_score = 73
rule_id = "ac6bc744-e82b-41ad-b58d-90654fa4ebfb"
severity = "high"
tags = [
    "Domain: Endpoint",
    "OS: Windows",
    "Use Case: Threat Detection",
    "Tactic: Initial Access",
    "Tactic: Execution",
    "Data Source: Elastic Defend",
    "Data Source: Sysmon"
]
timestamp_override = "event.ingested"
type = "eql"

query = '''
any where host.os.type == "windows" and process.name : "promecefpluginhost.exe" and 
(
 (event.category == "library" and 
  ?dll.path : 
     ("?:\\Users\\*\\AppData\\Local\\Temp\\wps\\INetCache\\*", 
      "\\Device\\Mup\\**", "\\\\*")) or 

  ((event.category == "process" and event.action : "Image loaded*") and 
  ?file.path : 
     ("?:\\Users\\*\\AppData\\Local\\Temp\\wps\\INetCache\\*", 
      "\\Device\\Mup\\**", "\\\\*"))
)
'''


[[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/"