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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Unusual Process Writing Data to an External Device

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Unusual Process Writing Data to an External Device

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A machine learning job has detected a rare process writing data to an external device. Malicious actors often use benign-looking processes to mask their data exfiltration activities. The discovery of such a process that has no legitimate reason to write data to external devices can indicate exfiltration.

Rule type: machine_learning

Rule indices: None

Severity: low

Risk score: 21

Runs every: 15m

Searches indices from: now-2h (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Use Case: Data Exfiltration Detection
Rule Type: ML
Rule Type: Machine Learning
Tactic: Exfiltration

Version: 4

Rule authors:

Elastic

Rule license: Elastic License v2

Setup

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Setup

The rule requires the Data Exfiltration Detection integration assets to be installed, as well as network and file events collected by integrations such as Elastic Defend and Network Packet Capture (for network events only).

Data Exfiltration Detection Setup

The Data Exfiltration Detection integration detects data exfiltration activity by identifying abnormalities in network and file events. Anomalies are detected using Elastic’s Anomaly Detection feature.

Prerequisite Requirements:

Fleet is required for Data Exfiltration Detection.
To configure Fleet Server refer to the documentation.
File events collected by the Elastic Defend integration.
To install Elastic Defend, refer to the documentation.

The following steps should be executed to install assets associated with the Data Exfiltration Detection integration:

Go to the Kibana homepage. Under Management, click Integrations.
In the query bar, search for Data Exfiltration Detection and select the integration to see more details about it.
Follow the instructions under the Installation section.
For this rule to work, complete the instructions through Add preconfigured anomaly detection jobs.

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Exfiltration
- ID: TA0010
- Reference URL: https://attack.mitre.org/tactics/TA0010/
Technique:
- Name: Exfiltration Over Physical Medium
- ID: T1052
- Reference URL: https://attack.mitre.org/techniques/T1052/

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