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Scenario 2 Infrastructure

The infrastructure listed below is specific to Scenario 2, which assumes that protective/preventative actions may be performed within the target environment. Scenario 1 has different infrastructure requirements than those described here, so only use this document as a reference for Scenario 2.

The requirements described herein should be considered a bare minimum to execute the scenario. If you have the time and resources to remain true-to-form, you may elect to stand up multiple of each of these servers, non-contiguous IP space, etc. If you are not concerned with emulating Carbanak to this degree, this level of effort is not necessary. You could for instance, phish, serve payload, and exfil from/to the same server.

Please note that binary executable files hosted in Resources have been added to password protected zip files. The password for these files is "malware."

We provide a script to automatically decrypt these files:

$ cd carbanak

$ python3 Resources/utilities/crypt_executables.py -i ./ -p malware --decrypt

Emulation Team Infrastructure

  1. Attacker Desktop: tested and executed on Ubuntu 20.04 LTS

  2. Attack Platform: tested and executed on Kali Linux 2019.1

Emulation Team Infrastructure Configuration

This methodology assumes the following static IP address configuration:

Red Team System IP Address
Attack Platform 192.168.0.4

A note about red team payloads

  • This evaluation utilizes payloads that model Carbanak malware.

  • Some pre-compiled payloads are available in the resources directory; however, they are configured to connect back to static IP address 192.168.0.4.

  • If you would like to build the payloads yourself, please make the necessary adjustments to the payload source to match your environment.

Attack Platform Setup

  1. Download the Carbanak Adversary Emulation Library to the home directory

  2. Enable SSH Port Forwarding

    printf "\nGatewayPorts yes\n >> /etc/ssh/sshd_config
systemctl restart sshd.service

  3. Add low privilege SSH user

  4. Enable Metasploit PostGRES database

  5. Stage certain files for download

    mkdir /var/files
cp /home/<attacker>/carbanak/Resources/step7/Java-Update.exe /var/files/
cp /home/<attacker>/carbanak/Resources/step10/tightvnc-2.8.27-gpl-setup-64bit.msi /var/files/
cp /home/<attacker>/carbanak/Resources/step10/vnc-settings.reg /var/files/
chmod 777 -R /var/files

  6. Generate SSH key to copy into domain

    ssh-keygen -t rsa -f "/home/<attacker>/carbanak/Resources/setup/ssh/id_rsa" -P ""

Target Infrastructure

4 targets, all domain joined:

  1. Domain Controller: tested and executed on Windows Server 2019 1809

  2. HR Manager Workstation: tested and executed on Windows 10 1909

  3. CFO Workstation: tested and executed on Windows 10 1909

    • Domain user with local admin access on only this machine

  4. Bank File Server: tested and executed on CentOS 7.7

Target Infrastructure Configuration

This methodology assumes the following hostname configurations:

Target System Hostname
Domain Controller bankdc
HR Manager Workstation hrmanager
CFO Workstation cfo
Bank File Server bankfileserver

Domain Controller Setup

  1. If only testing detection capabilities, disable Windows Defender

    The set-defender.ps1 PowerShell script in the setup folder can be used to perform this.

HR Manager Workstation Setup

  1. If only testing detection capabilities, disable Windows Defender

    The set-defender.ps1 PowerShell script in the setup folder can be used to perform this.

  2. Copy newly generated SSH keypair from attacker platform to the following directory:

    C:\Users\<domain_user>.<domain>\

  3. Disable OLE Security to enable execution of initial access payload

    The set-OLEsecurity.ps1 PowerShell script in the setup folder can be used to perform this.

CFO Workstation Setup

  1. If only testing detection capabilities, disable Windows Defender

    The set-defender.ps1 PowerShell script in the setup folder can be used to perform this.

  2. Give the CFO user RDP privileges on only this machine by adding them to the following local groups:

    Remote Desktop Users
Remote Management Users

  3. Copy Payment Transfer System executable onto Desktop of CFO user.

  4. Cache CFO User's credentials in Microsoft Edge:

    1. Open Edge

2. Navigate to github.com

3. Click "Sign In"

4. Enter fake creds:
    -Username: <cfo_user>@<domain_full>
    -Password: <fake_password>

5. Save credentials to password vault when prompted

6. Close Edge

7. Close RDP session

Bank File Server Setup

  1. Ensure the server is domain joined to the rest of the domain:

    https://www.redhat.com/sysadmin/linux-active-directory

  2. Copy the following prop files to the /var/tmp directory:

    carbanak/Resources/step5/network-diagram-financial.xml
carbanak/Resources/step5/help-desk-ticket.txt

  3. Copy the newly generated SSH keypair's public key id_rsa.pub to the SSH Authorized Keys file:

    /home/<domain_user>/.ssh/authorized_keys

Setup Automation

The setup-teamsherver.sh and setup-winhosts.ps1 scripts in the setup folder can be used to automate this process. These scripts use the default hostnames, but require usernames and host IP addresses to be substituted in place of placeholder values.

  1. Run setup-teamserver.sh on the Attack Platform.

    Note: The script assumes that this repo is downloaded to the user's home directory.

  2. Run setup-winhosts.ps1 on the Domain Controller.

Additional Plan Resources