Justin Ibarra
6bdfddac8e
* Expand timestamp_override tests * removed timestamp_override from eql sequence rules * add config entry for eql rules with beats index and t_o * add timestamp_override to missing fields
49 lines
1.7 KiB
TOML
49 lines
1.7 KiB
TOML
[metadata]
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creation_date = "2020/08/31"
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maturity = "production"
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updated_date = "2022/03/31"
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[rule]
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author = ["Elastic"]
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description = "Identifies a suspicious Conhost child process which may be an indication of code injection activity."
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Suspicious Process from Conhost"
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note = """## Config
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
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"""
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references = [
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"https://modexp.wordpress.com/2018/09/12/process-injection-user-data/",
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"https://github.com/sbousseaden/EVTX-ATTACK-SAMPLES/blob/master/Defense%20Evasion/evasion_codeinj_odzhan_conhost_sysmon_10_1.evtx",
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]
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risk_score = 73
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rule_id = "28896382-7d4f-4d50-9b72-67091901fd26"
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severity = "high"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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process where event.type in ("start", "process_started") and
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process.parent.name : "conhost.exe" and
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not process.executable : ("?:\\Windows\\splwow64.exe", "?:\\Windows\\System32\\WerFault.exe", "?:\\Windows\\System32\\conhost.exe")
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1055"
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name = "Process Injection"
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reference = "https://attack.mitre.org/techniques/T1055/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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