Suspicious WMIC XSL Script Execution

 1[metadata]
 2creation_date = "2020/09/02"
 3integration = ["endpoint", "windows"]
 4maturity = "production"
 5updated_date = "2024/10/15"
 6min_stack_version = "8.14.0"
 7min_stack_comments = "Breaking change at 8.14.0 for the Windows Integration."
 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 = [
17    "winlogbeat-*",
18    "logs-endpoint.events.process-*",
19    "logs-endpoint.events.library-*",
20    "logs-windows.sysmon_operational-*",
21]
22language = "eql"
23license = "Elastic License v2"
24name = "Suspicious WMIC XSL Script Execution"
25risk_score = 47
26rule_id = "7f370d54-c0eb-4270-ac5a-9a6020585dc6"
27severity = "medium"
28tags = [
29    "Domain: Endpoint",
30    "OS: Windows",
31    "Use Case: Threat Detection",
32    "Tactic: Defense Evasion",
33    "Tactic: Execution",
34    "Data Source: Elastic Defend",
35    "Data Source: Sysmon",
36]
37type = "eql"
38
39query = '''
40sequence by process.entity_id with maxspan = 2m
41[process where host.os.type == "windows" and event.type == "start" and
42   (process.name : "WMIC.exe" or process.pe.original_file_name : "wmic.exe") and
43   process.args : ("format*:*", "/format*:*", "*-format*:*") and
44   not process.command_line : ("* /format:table *", "* /format:table")]
45[any where host.os.type == "windows" and (event.category == "library" or (event.category == "process" and event.action : "Image loaded*")) and
46 (?dll.name : ("jscript.dll", "vbscript.dll") or file.name : ("jscript.dll", "vbscript.dll"))]
47'''
48
49
50[[rule.threat]]
51framework = "MITRE ATT&CK"
52[[rule.threat.technique]]
53id = "T1220"
54name = "XSL Script Processing"
55reference = "https://attack.mitre.org/techniques/T1220/"
56
57
58[rule.threat.tactic]
59id = "TA0005"
60name = "Defense Evasion"
61reference = "https://attack.mitre.org/tactics/TA0005/"
62[[rule.threat]]
63framework = "MITRE ATT&CK"
64[[rule.threat.technique]]
65id = "T1047"
66name = "Windows Management Instrumentation"
67reference = "https://attack.mitre.org/techniques/T1047/"
68
69
70[rule.threat.tactic]
71id = "TA0002"
72name = "Execution"
73reference = "https://attack.mitre.org/tactics/TA0002/"