Unusual Process Execution Path - Alternate Data Stream

 1[metadata]
 2creation_date = "2020/12/04"
 3integration = ["endpoint", "windows", "m365_defender", "sentinel_one_cloud_funnel"]
 4maturity = "production"
 5updated_date = "2024/10/10"
 6min_stack_version = "8.13.0"
 7min_stack_comments = "Breaking change at 8.13.0 for SentinelOne Integration."
 8
 9[rule]
10author = ["Elastic"]
11description = """
12Identifies processes running from an Alternate Data Stream. This is uncommon for legitimate processes and sometimes done
13by adversaries to hide malware.
14"""
15from = "now-9m"
16index = ["logs-endpoint.events.process-*", "winlogbeat-*", "logs-windows.sysmon_operational-*", "endgame-*", "logs-m365_defender.event-*", "logs-sentinel_one_cloud_funnel.*"]
17language = "eql"
18license = "Elastic License v2"
19name = "Unusual Process Execution Path - Alternate Data Stream"
20risk_score = 47
21rule_id = "4bd1c1af-79d4-4d37-9efa-6e0240640242"
22severity = "medium"
23tags = [
24    "Domain: Endpoint",
25    "OS: Windows",
26    "Use Case: Threat Detection",
27    "Tactic: Defense Evasion",
28    "Data Source: Elastic Endgame",
29    "Data Source: Elastic Defend",
30    "Data Source: Sysmon",
31    "Data Source: Microsoft Defender for Endpoint",
32    "Data Source: SentinelOne",
33]
34timestamp_override = "event.ingested"
35type = "eql"
36
37query = '''
38process where host.os.type == "windows" and event.type == "start" and
39  process.args : "?:\\*:*" and process.args_count == 1
40'''
41
42
43[[rule.threat]]
44framework = "MITRE ATT&CK"
45[[rule.threat.technique]]
46id = "T1564"
47name = "Hide Artifacts"
48reference = "https://attack.mitre.org/techniques/T1564/"
49[[rule.threat.technique.subtechnique]]
50id = "T1564.004"
51name = "NTFS File Attributes"
52reference = "https://attack.mitre.org/techniques/T1564/004/"
53
54
55
56[rule.threat.tactic]
57id = "TA0005"
58name = "Defense Evasion"
59reference = "https://attack.mitre.org/tactics/TA0005/"