Terrance DeJesus
3b994c1133
* adding new rule 'Attempt to Retrieve User Data from AWS EC2 Instance' * Update rules_building_block/discovery_userdata_request_from_ec2_instance.toml Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com> --------- Co-authored-by: Ruben Groenewoud <78494512+Aegrah@users.noreply.github.com>
63 lines
1.9 KiB
TOML
63 lines
1.9 KiB
TOML
[metadata]
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creation_date = "2024/04/14"
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integration = ["aws"]
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.9.0"
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updated_date = "2024/04/14"
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[rule]
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author = ["Elastic"]
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building_block_type = "default"
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description = """
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Identifies discovery request `DescribeInstanceAttribute` with the attribute userData and instanceId in AWS CloudTrail
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logs. This may indicate an attempt to retrieve user data from an EC2 instance. Adversaries may use this information to
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gather sensitive data from the instance or to identify potential vulnerabilities. This is a building block rule that
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does not generate an alert on its own, but serves as a signal for anomalous activity.
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"""
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from = "now-119m"
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index = ["filebeat-*", "logs.aws.cloudtrail-*"]
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interval = "60m"
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language = "kuery"
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license = "Elastic License v2"
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name = "Attempt to Retrieve User Data from AWS EC2 Instance"
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references = [
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"https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeInstanceAttribute.html",
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"https://hackingthe.cloud/aws/exploitation/local_ec2_priv_esc_through_user_data",
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]
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risk_score = 21
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rule_id = "c1e79a70-fa6f-11ee-8bc8-f661ea17fbce"
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severity = "low"
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tags = [
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"Domain: Cloud",
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"Data Source: AWS",
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"Data Source: Amazon Web Services",
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"Data Source: Amazon EC2",
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"Use Case: Log Auditing",
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"Tactic: Discovery",
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"Rule Type: BBR"
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]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.dataset:aws.cloudtrail
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and event.action:DescribeInstanceAttribute
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and aws.cloudtrail.request_parameters:(*attribute=userData* and *instanceId*)
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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 = "T1580"
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name = "Cloud Infrastructure Discovery"
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reference = "https://attack.mitre.org/techniques/T1580/"
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[rule.threat.tactic]
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id = "TA0007"
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name = "Discovery"
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reference = "https://attack.mitre.org/tactics/TA0007/"
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