Suspicious DLL Execution through Rasautou.exe (via process_creation)

title: Suspicious DLL Execution through Rasautou.exe (via process_creation)
id: e8887e59-87bf-5ee7-bc13-c2bafd7b5788
status: stable
description: This rule detects using Rasautou.exe for loading arbitrary .DLL specified in -d option and runs the export specified in -p.
references:
    - https://attack.mitre.org/techniques/T1218/
    - https://lolbas-project.github.io/lolbas/Binaries/Rasautou/
    - https://github.com/fireeye/DueDLLigence
    - https://www.fireeye.com/blog/threat-research/2019/10/staying-hidden-on-the-endpoint-evading-detection-with-shellcode.html
author: Huntrule Team
date: 2026-01-17
tags:
    - attack.stealth
    - attack.t1218
logsource:
    product: windows
    category: process_creation
    definition: Since options '-d' and '-p' were removed in Windows 10 this rule is relevant only for Windows before 10. And as Windows 7 doesn't log command line in 4688 by default, to detect this attack you need Sysmon 1 configured or KB3004375 installed for command-line auditing (https://support.microsoft.com/en-au/help/3004375/microsoft-security-advisory-update-to-improve-windows-command-line-aud)
detection:
    selection_img:
        - Image|endswith: '\rasautou.exe'
        - OriginalFileName: 'rasdlui.exe'
    selection_cli:
        CommandLine|contains|all:
            - ' -d '
            - ' -p '
    condition: all of selection*
falsepositives:
    - Unknown
level: medium