Attempt to Install Kali Linux via WSL

 1[metadata]
 2creation_date = "2023/01/12"
 3integration = ["endpoint", "windows", "system", "m365_defender", "sentinel_one_cloud_funnel", "crowdstrike"]
 4maturity = "production"
 5updated_date = "2024/10/31"
 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 = """
12Detects attempts to install or use Kali Linux via Windows Subsystem for Linux. Adversaries may enable and use WSL for
13Linux to avoid detection.
14"""
15from = "now-9m"
16index = [
17    "winlogbeat-*",
18    "logs-endpoint.events.process-*",
19    "logs-windows.forwarded*",
20    "logs-windows.sysmon_operational-*",
21    "endgame-*",
22    "logs-system.security*",
23    "logs-m365_defender.event-*",
24    "logs-sentinel_one_cloud_funnel.*",
25    "logs-crowdstrike.fdr*",
26]
27language = "eql"
28license = "Elastic License v2"
29name = "Attempt to Install Kali Linux via WSL"
30references = ["https://learn.microsoft.com/en-us/windows/wsl/wsl-config"]
31risk_score = 73
32rule_id = "dd34b062-b9e3-4a6b-8c0c-6c8ca6dd450e"
33severity = "high"
34tags = [
35    "Domain: Endpoint",
36    "OS: Windows",
37    "Use Case: Threat Detection",
38    "Tactic: Defense Evasion",
39    "Data Source: Elastic Endgame",
40    "Data Source: Elastic Defend",
41    "Data Source: System",
42    "Data Source: Microsoft Defender for Endpoint",
43    "Data Source: Sysmon",
44    "Data Source: SentinelOne",
45    "Data Source: Crowdstrike",
46]
47timestamp_override = "event.ingested"
48type = "eql"
49
50query = '''
51process where host.os.type == "windows" and event.type == "start" and
52(
53  (process.name : "wsl.exe" and process.args : ("-d", "--distribution", "-i", "--install") and process.args : "kali*") or 
54  process.executable : (
55    "?:\\Users\\*\\AppData\\Local\\packages\\kalilinux*", 
56    "?:\\Users\\*\\AppData\\Local\\Microsoft\\WindowsApps\\kali.exe",
57    "?:\\Program Files*\\WindowsApps\\KaliLinux.*\\kali.exe",
58    "\\Device\\HarddiskVolume?\\Users\\*\\AppData\\Local\\packages\\kalilinux*", 
59    "\\Device\\HarddiskVolume?\\Users\\*\\AppData\\Local\\Microsoft\\WindowsApps\\kali.exe",
60    "\\Device\\HarddiskVolume?\\Program Files*\\WindowsApps\\KaliLinux.*\\kali.exe"
61  )
62)
63'''
64
65
66[[rule.threat]]
67framework = "MITRE ATT&CK"
68[[rule.threat.technique]]
69id = "T1202"
70name = "Indirect Command Execution"
71reference = "https://attack.mitre.org/techniques/T1202/"
72
73
74[rule.threat.tactic]
75id = "TA0005"
76name = "Defense Evasion"
77reference = "https://attack.mitre.org/tactics/TA0005/"