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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Remote File Download via MpCmdRun

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Remote File Download via MpCmdRun

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Identifies the Windows Defender configuration utility (MpCmdRun.exe) being used to download a remote file.

Rule type: eql

Rule indices:

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

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:

Tags:

Elastic
Host
Windows
Threat Detection
Command and Control

Version: 5 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 7.13.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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Triage and analysis

Investigating Remote File Download via MpCmdRun Verify details such as the parent process, URL reputation, and downloaded file details. Additionally, MpCmdRun logs this information in the Appdata Temp folder in MpCmdRun.log.

Rule query

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process where event.type == "start" and (process.name :
"MpCmdRun.exe" or process.pe.original_file_name == "MpCmdRun.exe") and
process.args : "-DownloadFile" and process.args : "-url" and
process.args : "-path"

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Command and Control
- ID: TA0011
- Reference URL: https://attack.mitre.org/tactics/TA0011/
Technique:
- Name: Ingress Tool Transfer
- ID: T1105
- Reference URL: https://attack.mitre.org/techniques/T1105/

Rule version history

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Version 5 (7.13.0 release)

Updated query, changed from:

event.category:process and event.type:(start or process_started) and
(process.name:MpCmdRun.exe or
process.pe.original_file_name:MpCmdRun.exe) and
process.args:(("-DownloadFile" or "-downloadfile") and "-url" and
"-path")

Version 4 (7.12.0 release)

Formatting only

Version 3 (7.11.2 release)

Formatting only

Version 2 (7.11.0 release)

Updated query, changed from:

event.category:process and event.type:(start or process_started) and
(process.name:MpCmdRun.exe or
process.pe.original_file_name:MpCmdRun.exe or
winlog.event_data.OriginalFileName:MpCmdRun.exe) and
process.args:(("-DownloadFile" or "-downloadfile") and "-url" and
"-path")

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