IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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AWS EC2 Full Network Packet Capture Detected

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AWS EC2 Full Network Packet Capture Detected

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Identifies potential Traffic Mirroring in an Amazon Elastic Compute Cloud (EC2) instance. Traffic Mirroring is an Amazon VPC feature that you can use to copy network traffic from an Elastic network interface. This feature can potentially be abused to exfiltrate sensitive data from unencrypted internal traffic.

Rule type: query

Rule indices:

filebeat-*
logs-aws*

Severity: medium

Risk score: 47

Runs every: 10 minutes

Searches indices from: now-60m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Cloud
AWS
Continuous Monitoring
SecOps
Network Security

Version: 4 (version history)

Added (Elastic Stack release): 7.14.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic, Austin Songer

Rule license: Elastic License v2

Potential false positives

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Traffic Mirroring may be done by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. Traffic Mirroring from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Investigation guide

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Rule query

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event.dataset:aws.cloudtrail and event.provider:ec2.amazonaws.com and
event.action:(CreateTrafficMirrorFilter or
CreateTrafficMirrorFilterRule or CreateTrafficMirrorSession or
CreateTrafficMirrorTarget) and event.outcome:success

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Exfiltration
- ID: TA0010
- Reference URL: https://attack.mitre.org/tactics/TA0010/
Technique:
- Name: Automated Exfiltration
- ID: T1020
- Reference URL: https://attack.mitre.org/techniques/T1020/
Tactic:
- Name: Collection
- ID: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
Technique:
- Name: Data Staged
- ID: T1074
- Reference URL: https://attack.mitre.org/techniques/T1074/

Rule version history

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Version 4 (8.4.0 release)

Updated query, changed from:

event.dataset:aws.cloudtrail and event.provider:ec2.amazonaws.com and
event.action:(CreateTrafficMirrorFilter or
CreateTrafficMirrorFilterRule or CreateTrafficMirrorSession or
CreateTrafficMirrorTarget) and event.outcome:success

Version 2 (7.15.0 release)

Formatting only

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