Remote Management and Monitoring tool - MSP360_CloudBerry - Network Connection

Hunt Hypothesis

Unusual network connections from MSP360_CloudBerry to external domains may indicate adversary use of the tool for C2 or persistence. SOC teams should proactively hunt for this behavior to detect potential compromise of endpoints managed by RMM tools.

KQL Query

let Time_start = now(-5d);
let Time_end = now();
//
DeviceNetworkEvents
| where Timestamp between (Time_start..Time_end)
| where RemoteUrl has_any (
        'rm.mspbackups.com',
        'client.rmm.mspbackups.com',
        'settings.services.mspbackups.com',
        'connect.ra.msp360.com',
        'foris.cloudberrylab.com'
    )
    and InitiatingProcessVersionInfoCompanyName has_any (
        'CloudBerry',
        'MSP360'
    )
| summarize FirstSeen=min(Timestamp), LastSeen=max(Timestamp), 
    Report=make_set(ReportId), Count=count() by DeviceId, DeviceName,
    RemoteUrl 

Analytic Rule Definition

id: 3a4d43d5-2326-467c-a22a-4f1f1f3e2890
name: Remote Management and Monitoring tool - MSP360_CloudBerry - Network Connection
description: |
    Remote Monitoring and Management (RMM) programs are IT to manage remote endpoints. Attackers have begun to abuse these programs to persist or provide C2 channels.
    https://github.com/jischell-msft/RemoteManagementMonitoringTools
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceNetworkEvents
tactics: CommandAndControl
relevantTechniques: T1219
query: |
  let Time_start = now(-5d);
  let Time_end = now();
  //
  DeviceNetworkEvents
  | where Timestamp between (Time_start..Time_end)
  | where RemoteUrl has_any (
          'rm.mspbackups.com',
          'client.rmm.mspbackups.com',
          'settings.services.mspbackups.com',
          'connect.ra.msp360.com',
          'foris.cloudberrylab.com'
      )
      and InitiatingProcessVersionInfoCompanyName has_any (
          'CloudBerry',
          'MSP360'
      )
  | summarize FirstSeen=min(Timestamp), LastSeen=max(Timestamp), 
      Report=make_set(ReportId), Count=count() by DeviceId, DeviceName,
      RemoteUrl 

Required Data Sources

MITRE ATT&CK Context

• Tactic: CommandAndControl
• Technique: T1219 — T1219

References

• [Source Query](https://github.com/Azure/Azure-Sentinel/blob/main/Hunting Queries/Microsoft 365 Defender/RemoteManagementMonitoring/rmm_MSP360_CloudBerry_netconn.yaml)

False Positive Guidance

• Scenario: Scheduled Backup Job Using MSP360
  Description: A legitimate backup job initiated by MSP360 is establishing a network connection to a remote server for data transfer.
  Filter/Exclusion: process.name == "MSP360Backup.exe" or process.name == "CloudBerryBackup.exe"

• Scenario: CloudBerry Sync Job Running on Endpoint
  Description: CloudBerry is synchronizing files between the endpoint and a cloud storage service, which may trigger network connection alerts.
  Filter/Exclusion: process.name == "CloudBerrySync.exe" or destination_ip == "cloudberry.com"

• Scenario: Admin Performing Remote System Monitoring via MSP360
  Description: An IT admin is using MSP360 to monitor system performance and check logs on a remote endpoint.
  Filter/Exclusion: user == "ITAdminUser" or process.name == "MSP360Monitor.exe"

• Scenario: Network Discovery via CloudBerry Agent
  Description: The CloudBerry agent is performing a network discovery scan to map the internal network for configuration purposes.
  Filter/Exclusion: process.name == "CloudBerryAgent.exe" and destination_port == 445 or destination_port == 139

• Scenario: Remote PowerShell Session for Troubleshooting
  Description: An admin is using PowerShell remoting via CloudBerry to troubleshoot an endpoint, which may trigger network connection alerts.
  Filter/Exclusion: process.name == "powershell.exe" and command_line contains "Invoke-Command" or user == "ITAdminUser"