title: Rundll32 Internet Connection
status: experimental
description: Detects a rundll32 that communicates with piblic IP addresses
reference: https://www.hybrid-analysis.com/sample/759fb4c0091a78c5ee035715afe3084686a8493f39014aea72dae36869de9ff6?environmentId=100
author: Florian Roth
date: 2017/11/04
logsource:
    product: windows
    service: sysmon
detection:
    selection:
        EventID: 3
        Image: '*\rundll32.exe'
    filter:
        DestinationIp: 
            - '10.*'
            - '192.168.*'
            - '172.*'
    condition: selection and not filter
falsepositives:
    - Communication to other corporate systems that use IP addresses from public address spaces
level: medium