Suspicious Termination of ESXI Process

 1[metadata]
 2creation_date = "2023/04/11"
 3integration = ["endpoint"]
 4maturity = "production"
 5min_stack_comments = "New fields added: required_fields, related_integrations, setup"
 6min_stack_version = "8.5.0"
 7updated_date = "2023/04/11"
 8
 9[rule]
10author = ["Elastic"]
11description = """
12Identifies instances where VMware processes, such as "vmware-vmx" or "vmx," are terminated on a Linux system
13by a "kill" command. The rule monitors for the "end" event type, which signifies the termination of a process.
14The presence of a "kill" command as the parent process for terminating VMware processes may indicate that a
15threat actor is attempting to interfere with the virtualized environment on the targeted system.
16"""
17from = "now-9m"
18index = ["logs-endpoint.events.*"]
19language = "eql"
20license = "Elastic License v2"
21name = "Suspicious Termination of ESXI Process"
22references = [
23    "https://www.bleepingcomputer.com/news/security/massive-esxiargs-ransomware-attack-targets-vmware-esxi-servers-worldwide/",
24]
25risk_score = 47
26rule_id = "6641a5af-fb7e-487a-adc4-9e6503365318"
27severity = "medium"
28tags = ["Domain: Endpoint", "OS: Linux", "Use Case: Threat Detection", "Tactic: Impact", "Data Source: Elastic Defend"]
29timestamp_override = "event.ingested"
30type = "eql"
31query = '''
32process where host.os.type == "linux" and event.type == "end" and process.name : ("vmware-vmx", "vmx")
33and process.parent.name : "kill"
34'''
35
36
37[[rule.threat]]
38framework = "MITRE ATT&CK"
39[[rule.threat.technique]]
40id = "T1489"
41name = "Service Stop"
42reference = "https://attack.mitre.org/techniques/T1489/"
43
44
45[rule.threat.tactic]
46id = "TA0040"
47name = "Impact"
48reference = "https://attack.mitre.org/tactics/TA0040/"```