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Network Connection via Mshta

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Network Connection via Mshta

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Identifies mshta.exe making a network connection. This may indicate adversarial activity as mshta.exe is often leveraged by adversaries to execute malicious scripts and evade detection.

Rule type: query

Rule indices:

winlogbeat-*
logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5 minutes

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

Maximum alerts per execution: 100

References:

https://www.fireeye.com/blog/threat-research/2017/05/cyber-espionage-apt32.html

Tags:

Elastic
Windows

Version: 4 (version history)

Added (Elastic Stack release): 7.6.0

Last modified (Elastic Stack release): 7.9.1

Rule authors: Elastic

Rule license: Elastic License

Rule query

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event.category:network and event.type:connection and
process.name:mshta.exe

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
Technique:
- Name: Mshta
- ID: T1170
- Reference URL: https://attack.mitre.org/techniques/T1170/

Rule version history

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Version 4 (7.9.1 release)

Formatting only

Version 3 (7.9.0 release)

Updated query, changed from:

event.action:"Network connection detected (rule: NetworkConnect)" and
process.name:mshta.exe

Version 2 (7.7.0 release)

Updated query, changed from:

event.action:"Network connection detected (rule: NetworkConnect)" and
process.name:"mshta.exe"

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