title: F-Secure C3 Load by Rundll32
status: test
id: b18c9d4c-fac9-4708-bd06-dd5bfacf200f
author: Alfie Champion (ajpc500)
date: 2021/06/02
description: F-Secure C3 produces DLLs with a default exported StartNodeRelay function.
references:
    - https://github.com/FSecureLABS/C3/blob/master/Src/NodeRelayDll/NodeRelayDll.cpp#L12
tags:
    - attack.defense_evasion
    - attack.t1218.011
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'rundll32.exe'
            - '.dll'
            - 'StartNodeRelay'
    condition: selection
falsepositives:
    - Unknown
level: critical
