UAC Bypass via Malicious MMC Snap-In Execution

[rule]
description = """
Identifies attempts to bypass User Account Control (UAC) by executing a malicious Microsoft Management Console (MMC)
snap-in. Attackers bypass UAC to stealthily execute code with elevated permissions.
"""
id = "ccdf56a8-697b-497c-ab90-3aa01bfc5f9f"
license = "Elastic License v2"
name = "UAC Bypass via Malicious MMC Snap-In Execution"
os_list = ["windows"]
reference = ["https://github.com/hfiref0x/UACME/"]
version = "1.0.31"

query = '''
sequence with maxspan=60s
 [file where event.action != "deletion" and file.extension : "msc" and not user.name : "SYSTEM"]
 [process where event.action == "start" and
  process.name : "mmc.exe" and process.command_line : "*.msc *.msc*"]
 [process where event.action == "start" and
  process.parent.name : "mmc.exe" and process.Ext.token.integrity_level_name == "high" and
  not process.executable :
           ("?:\\Windows\\System32\\WerFault.exe",
            "?:\\Windows\\SysWOW64\\WerFault.exe")]
'''

min_endpoint_version = "7.15.0"
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 2

[[optional_actions]]
action = "rollback"
field = "process.entity_id"
state = 2

[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1548"
name = "Abuse Elevation Control Mechanism"
reference = "https://attack.mitre.org/techniques/T1548/"
[[threat.technique.subtechnique]]
id = "T1548.002"
name = "Bypass User Account Control"
reference = "https://attack.mitre.org/techniques/T1548/002/"



[threat.tactic]
id = "TA0004"
name = "Privilege Escalation"
reference = "https://attack.mitre.org/tactics/TA0004/"

[internal]
min_endpoint_version = "7.15.0"