Suspicious WMIC XSL Script Execution

 1[metadata]
 2creation_date = "2020/09/02"
 3integration = ["endpoint", "windows"]
 4maturity = "production"
 5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 6min_stack_version = "8.3.0"
 7updated_date = "2024/04/08"
 8
 9[rule]
10author = ["Elastic"]
11description = """
12Identifies WMIC allowlist bypass techniques by alerting on suspicious execution of scripts. When WMIC loads scripting
13libraries it may be indicative of an allowlist bypass.
14"""
15from = "now-9m"
16index = ["winlogbeat-*", "logs-endpoint.events.process-*", "logs-endpoint.events.library-*", "logs-windows.sysmon_operational-*"]
17language = "eql"
18license = "Elastic License v2"
19name = "Suspicious WMIC XSL Script Execution"
20risk_score = 47
21rule_id = "7f370d54-c0eb-4270-ac5a-9a6020585dc6"
22severity = "medium"
23tags = ["Domain: Endpoint", "OS: Windows", "Use Case: Threat Detection", "Tactic: Defense Evasion", "Tactic: Execution", "Data Source: Elastic Defend", "Data Source: Sysmon"]
24type = "eql"
25
26query = '''
27sequence by process.entity_id with maxspan = 2m
28[process where host.os.type == "windows" and event.type == "start" and
29   (process.name : "WMIC.exe" or process.pe.original_file_name : "wmic.exe") and
30   process.args : ("format*:*", "/format*:*", "*-format*:*") and
31   not process.command_line : ("* /format:table *", "* /format:table")]
32[any where host.os.type == "windows" and (event.category == "library" or (event.category == "process" and event.action : "Image loaded*")) and
33 (?dll.name : ("jscript.dll", "vbscript.dll") or file.name : ("jscript.dll", "vbscript.dll"))]
34'''
35
36
37[[rule.threat]]
38framework = "MITRE ATT&CK"
39[[rule.threat.technique]]
40id = "T1220"
41name = "XSL Script Processing"
42reference = "https://attack.mitre.org/techniques/T1220/"
43
44
45[rule.threat.tactic]
46id = "TA0005"
47name = "Defense Evasion"
48reference = "https://attack.mitre.org/tactics/TA0005/"
49
50[[rule.threat]]
51framework = "MITRE ATT&CK"
52
53[[rule.threat.technique]]
54id = "T1047"
55name = "Windows Management Instrumentation"
56reference = "https://attack.mitre.org/techniques/T1047/"
57
58[rule.threat.tactic]
59id = "TA0002"
60name = "Execution"
61reference = "https://attack.mitre.org/tactics/TA0002/"