Detection rules › Elastic
Suspicious WMI Event Consumer Subscription
WMI Event Consumers can be used by malware for file-less persistence, and are rare otherwise.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence |
Rule body
[rule]
description = "WMI Event Consumers can be used by malware for file-less persistence, and are rare otherwise."
id = "3946dd5a-820d-4e5a-ad01-d2f00a6bb2e2"
license = "Elastic License v2"
name = "Suspicious WMI Event Consumer Subscription"
os_list = ["windows"]
reference = [
"https://github.com/devonakerr/Presentations/blob/master/There%27s%20something%20about%20WMI%20-%20SANS%20DFIR%20Prague%202015.pdf",
]
version = "1.0.5"
query = '''
api where
process.Ext.api.summary like "IWbemServices::PutInstance*FilterToConsumerBinding*" and
not (
process.code_signature.trusted == true and
process.code_signature.subject_name in ("HP Inc.", "HP Inc") and
process.Ext.api.parameters.consumer_type == "CommandLineEventConsumer"
)
'''
min_endpoint_version = "8.15.0"
optional_actions = []
[[actions]]
action = "kill_process"
field = "process.entity_id"
state = 0
[[threat]]
framework = "MITRE ATT&CK"
[[threat.technique]]
id = "T1546"
name = "Event Triggered Execution"
reference = "https://attack.mitre.org/techniques/T1546/"
[[threat.technique.subtechnique]]
id = "T1546.003"
name = "Windows Management Instrumentation Event Subscription"
reference = "https://attack.mitre.org/techniques/T1546/003/"
[threat.tactic]
id = "TA0003"
name = "Persistence"
reference = "https://attack.mitre.org/tactics/TA0003/"
[internal]
min_endpoint_version = "8.15.0"
Stages and Predicates
Stage 1: api
api where
process.Ext.api.summary like "IWbemServices::PutInstance*FilterToConsumerBinding*" and
not (
process.code_signature.trusted == true and
process.code_signature.subject_name in ("HP Inc.", "HP Inc") and
process.Ext.api.parameters.consumer_type == "CommandLineEventConsumer"
)
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
process.Ext.api.parameters.consumer_type | eq | CommandLineEventConsumer | excludes:process.Ext.api.parameters.consumer_type field:"process.Ext.api.parameters.consumer_type" value:"CommandLineEventConsumer" |
process.code_signature.subject_name | in | HP Inc, HP Inc. | excludes:process.code_signature.subject_name field:"process.code_signature.subject_name" value:"HP Inc" field:"process.code_signature.subject_name" value:"HP Inc." |
process.code_signature.trusted | eq | true | excludes:process.code_signature.trusted field:"process.code_signature.trusted" value:"true" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
process.Ext.api.summary | wildcard |
| field:"process.Ext.api.summary" kind:wildcard value:"IWbemServices::PutInstance*FilterToConsumerBinding*" |