[rule]
description = "Identifies attempt to stop or disable the Windows Defender services from an unusual parent process."
id = "32ab2977-2932-4172-9117-36e382591818"
license = "Elastic License v2"
name = "Attempt to Disable Windows Defender Services"
os_list = ["windows"]
reference = ["https://www.elastic.co/security-labs/luna-ransomware-attack-pattern"]
version = "1.0.28"
query = '''
process where event.action == "start" and
process.pe.original_file_name : ("net.exe", "sc.exe", "cmd.exe") and
process.command_line : ("*disabled*", "*stop*") and process.command_line : ("*WdNisSvc*", "*WinDefend*") and
(process.parent.executable :
("?:\\Windows\\Microsoft.NET\\*",
"?:\\Users\\*",
"?:\\ProgramData\\*") or
process.parent.name : ("rundll32.exe", "regsvr32.exe", "wscript.exe", "cscript.exe", "powershell.exe", "mshta.exe"))
'''
min_endpoint_version = "7.15.0"
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
[[actions]]
action = "kill_process"
field = "process.parent.entity_id"
state = 0
[[optional_actions]]
action = "rollback"
field = "process.parent.entity_id"
state = 0
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1562"
name = "Impair Defenses"
reference = "https://attack.mitre.org/techniques/T1562/"
[[threat.technique.subtechnique]]
id = "T1562.001"
name = "Disable or Modify Tools"
reference = "https://attack.mitre.org/techniques/T1562/001/"
[threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"
[internal]
min_endpoint_version = "7.15.0"