The Emotet client is broken up into the following components:
| Component | Description |
|---|---|
| EmotetClientDLL | The main implant in DLL format |
| OutlookScraper | Outlook scraper module |
| LatMovementDLL | Lateral movement module |
Open the developer command prompt, navigate to directory containing the Emotet Client DLL Visual Studio solution file (EmotetClientDLL.sln), and run the devenv.exe command:
cd %userprofile%\wizard_spider\Resources\Emotet\EmotetClientDLL
devenv.exe EmotetClientDLL.sln /build Release
Wait about 3 minutes for the build to finish.
The executable will be found in the Release folder:
wizard_spider\Resources\Emotet\EmotetClientDLL\EmotetClientDLL\x64
Note: if building Emotet for the first time, first build EmotetClientDLL.sln in Visual Studio so it can fetch dependencies (googletest).
Open the command prompt (cmd.exe), navigate to directory containing the Outlook Scaper Visual Studio solution file (OutlookScraper.sln), and run the devenv.exe command:
cd wizard_spider\Resources
"C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Common7\IDE\devenv.exe" OutlookScraper.sln /build Release
The executable will be found in the Release folder.
Open the command prompt (cmd.exe), navigate to directory containing the Emotet Client DLL Visual Studio solution file (EmotetClientDLL.sln), and run the devenv.exe command:
cd wizard_spider\Resources
"C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Common7\IDE\devenv.exe" EmotetClientDLL.sln
Previous command will open project in Visual Studio, run all tests by opening the Test Explorer and clicking in on "Run All Test In View".
Test > Test Explorer > "Run All Test In View" button
Open the command prompt (cmd.exe)
rundll32.exe C:\%USERPROFILE%\{path to DLL}\EmotetClientDLL.dll,Control_RunDLL
Open a command prompt or PowerShell and navigate to the directory from where the DLL was ran.
del EmotetClientDLL.dll (or renamed)
del Outlook.dll (if installed)
del LatMovementDLL.dll (if installed)
del PAExec.exe (if installed)
Conditions required:
- Requires range configuration to remove Outlook prompt when DLL is accessing Outlook via PowerShell.
(PowerShell) New-Item –Path "HKLM:\SOFTWARE\Microsoft\Office\16.0\Outlook" –Name Security
(PowerShell) New-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Office\16.0\Outlook\Security" -Name "ObjectModelGuard" -Value 2 -PropertyType "DWord"
https://attack.mitre.org/software/S0367 https://www.cisecurity.org/white-papers/ms-isac-security-primer-emotet/ https://blogs.vmware.com/security/2019/04/cb-tau-threat-intelligence-notification-emotet-utilizing-wmi-to-launch-powershell-encoded-code.html https://securityintelligence.com/new-banking-trojan-icedid-discovered-by-ibm-x-force-research/ https://unit42.paloaltonetworks.com/attack-chain-overview-emotet-in-december-2020-and-january-2021/ https://www.fortinet.com/blog/threat-research/deep-dive-into-emotet-malware https://support.malwarebytes.com/hc/en-us/articles/360038524714s
https://docs.microsoft.com/en-us/visualstudio/ide/reference/build-devenv-exe?view=vs-2019