Microsoft Sync Center Suspicious Network Connections (via network_connection)

title: Microsoft Sync Center Suspicious Network Connections (via network_connection)
id: 727c673e-ffe9-56aa-9647-20be394dcb52
status: stable
description: This rule detects anomalous connections from Microsoft Sync Center to non-private IPs.
references:
    - https://attack.mitre.org/techniques/T1218/
    - https://attack.mitre.org/techniques/T1055/
    - https://redcanary.com/blog/intelligence-insights-november-2021/
author: Huntrule Team
date: 2026-01-18
tags:
    - attack.privilege-escalation
    - attack.stealth
    - attack.t1055
    - attack.t1218
    - attack.execution
logsource:
    product: windows
    category: network_connection
detection:
    selection:
        Image|endswith: '\mobsync.exe'
    filter_main_local_ranges:
        DestinationIp|cidr:
            - '127.0.0.0/8'
            - '10.0.0.0/8'
            - '172.16.0.0/12'
            - '192.168.0.0/16'
            - '169.254.0.0/16'
            - '::1/128'
            - 'fe80::/10'
            - 'fc00::/7'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium