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MsBuild Network Connection Sequence

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MsBuild Network Connection Sequence

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Identifies MsBuild.exe making outbound network connections. This may indicate adversarial activity as MsBuild is often leveraged by adversaries to execute code and evade detection.

Rule type: eql

Rule indices:

logs-endpoint.events.*
winlogbeat-*
logs-windows.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Defense Evasion

Version: 1

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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/* duplicate of MsBuild Making Network Connections - 0e79980b-4250-4a50-a509-69294c14e84b */

sequence by process.entity_id
  [process where host.os.type == "windows" and event.type == "start" and process.name : "MSBuild.exe"]
  [network where host.os.type == "windows" and process.name : "MSBuild.exe" and
     not (destination.ip == "127.0.0.1" and source.ip == "127.0.0.1")]

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Trusted Developer Utilities Proxy Execution
- ID: T1127
- Reference URL: https://attack.mitre.org/techniques/T1127/
Sub-technique:
- Name: MSBuild
- ID: T1127.001
- Reference URL: https://attack.mitre.org/techniques/T1127/001/

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