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Detectioncriticaltest

HackTool - F-Secure C3 Load by Rundll32

F-Secure C3 produces DLLs with a default exported StartNodeRelay function.

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Launch
Alfie Champion (ajpc500)Created Wed Jun 02Updated Sun Mar 05b18c9d4c-fac9-4708-bd06-dd5bfacf200fwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic
Detection Logic1 selector
detection:
    selection:
        CommandLine|contains|all:
            - 'rundll32.exe'
            - '.dll'
            - 'StartNodeRelay'
    condition: selection
False Positives
Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References
1
Resolving title…
github.com
MITRE ATT&CK

Sub-techniques

T1218.011 · Rundll32
Rule Metadata
Rule ID
b18c9d4c-fac9-4708-bd06-dd5bfacf200f
Status
test
Level
critical
Type
Detection
Created
Wed Jun 02
Modified
Sun Mar 05
Author
Alfie Champion (ajpc500)
Path
rules/windows/process_creation/proc_creation_win_hktl_c3_rundll32_pattern.yml
Raw Tags
attack.defense-evasionattack.t1218.011
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