Technical Cyber Defense Strategies Explained

Marcus Murray & Hasain AlshakartiTruesec Security Team, MVP-Enterprise Security x2

Marcus Murray Hasain Alshakarti

WARNING!Session format

=DISCUSSION!

Soo.. What does it take to be hack-proof?

Let´s start with the big picture!

We all know what a network looks like..

Web Srv Mail Srv

File SrvDC Mail Srv

ClientClient

Attacker

Internet Strategy

Web Srv Mail Srv

SqlSrvDC FileSrv

Client

UserAdmin

Client

Attacker

Front-end

Back-end

Client

Traditional internal Strategy

Web Srv Mail Srv

SqlSrvDC FileSrv

Client

UserAdmin

Client

AttackerFront-end

Back-end

Admin

Client

Demo – Hacking SQL..

SqlSrv Attacker

Traditional Internet strategy

FileSrv

Client

Attacker

Internet Front-end

Internal Front-end

Client network(Internet)

Internet back-end

Internal back-end

Cloud Front-end

Cloud back-end

WorldAccessible

Client network(Managed)

Trusted access

World access

Admin access

Client

Client

Client Client

Apply Internet strategy internally

Internet Front-end

Internal Front-end

Client network(Managed)

Secure Access Layer

Client network(Internet)

Internet back-end

Internal back-end

Cloud Front-end

Cloud back-end

WorldAccessible

Trusted access

World access

Admin access

Client

Client

Attacker

Let´s add som future.. (today for some..)

Internet Front-end

Internal Front-end

Client network(Managed)

Secure Access Layer

Client network(Internet)

Internet back-end

Internal back-end

Cloud Front-end

Cloud back-end

WorldAccessible

Trusted access

World access

Admin access

Client

Client

Attacker

Fabric controllersFabric controllers.

Implementing Secure networking - DEMO

• Ipsec domain isolation• Direct Access• Ipsec server isolation

Domain Isolation - Demo

Internal

Client network(Managed)

Trusted access

World access

Admin accessClient

Attacker

Client

File Srv

Sql Srv

Attacker

Direct access - Demo

Internal

Client network(Managed)

Secure Access LayerWorldAccessible

Trusted access

World access

Admin accessClient

Attacker

Client

DA Srv

File Srv

Sql Srv

Server isolation - Demo

Internal Front-end

Client network(Managed)

Secure Access Layer

Internal back-end

WorldAccessible

Trusted access

World access

Admin accessClient

Attacker

Client

DA Srv

File Srv

Sql Srv

So, if the clients are on the ”internet” all the time..

• Physical access• Firewall• Patching• Non-admin• Malware protection• Secure transport

Client

User

Web Srv

Attacker

Physical access protection

• Bitlocker• Protect from DMA access!

– http://support.microsoft.com/kb/2516445

Local Firewall

• Is there ANY reason why the client firewall must allow inbound traffic at any time?

Client

User

Web Srv

AttackerClient

User

Patching, of course, but what about the 0-days?

• Non-Admin• Early mitigations• Patching strategy

Client

User

Web Srv

AttackerClient

User

Malware protection

• Macro settings• Antivirus? Yes or No?• Remember applocker?

Attacker

Client

User

Secure transports….

• Weak protocols…– Clear text– NTLM configurations

• Direct access!• IPSEC!

Client

User

Web Srv

AttackerClient

User

So, what about BYOD?

Internet Front-end

Internal Front-end

Client network(Managed)

Secure Access Layer

Client network(Internet)

Internet back-end

Internal back-end

Cloud Front-end

Cloud back-end

WorldAccessible

Trusted access

World access

Admin access

Client

Client

Attacker

• Application classification• Data classification

..and… adminclients

• Should an adminuser/computer be on the ”internet”?

• Should an admin user read email?

• Safe admin access– Non compromized computer– Trusted communication channel– Robust exposure of admin interface

• Robust services• Limited number of administrators

– Authentication– Authorization

Client

Admin

DC

Attacker

And let´s talk about server services.

• Robust service– Authentication– Authorization

• Firewall• Patching• privs• depencencies• Admin exposure

Client

User

Web Srv

Attacker

Web server attack

Web SrvAttacker

Marcus Murray Hasain Alshakarti

Thank you for listening!