Sep 10 2015
The content in this post describes a method by which an attacker could persist administrative access to Active Directory after having Domain Admin level rights for 5 minutes. I presented on this AD persistence method in Las Vegas at DEF CON 23 (2015). Complete list of Sneaky Active Directory Persistence Tricks posts The Directory …
Sep 02 2015
Looks like we are getting closer to Windows Server 2016 RTM! Microsoft released Windows Server 2016 Technical Preview 3 in late August (Download & Release Notes).
Aug 13 2015
At Black Hat USA 2015 this summer (2015), I spoke about the danger in having Kerberos Unconstrained Delegation configured in the environment. When Active Directory was first released with Windows 2000 Server, Microsoft had to provide a simple mechanism to support scenarios where a user authenticates to a Web Server via Kerberos and needs to …
Aug 07 2015
At my talk at Black Hat USA 2015, I highlighted new Golden Ticket capability in Mimikatz (“Enhanced Golden Tickets”). This post provides additional detailed on “enhanced” Golden Tickets. Over the past few months, I researched how SID History can be abused in modern enterprises. As part of this research, I reached out to Benjamin Delpy, …
May 11 2015
Benjamin Delpy published some YARA rules in detecting Mimikatz use in your environment. More information on Mimikatz capability is in the “Unofficial Mimikatz Guide & Command Reference” on this site. YARA is described as: YARA is a tool aimed at (but not limited to) helping malware researchers to identify and classify malware samples. With YARA …
May 07 2015
At the Microsoft Ignite conference this week, there are several sessions covering Windows 10 features. One of biggest changes in Windows 10 is the new credential management method and the related “Next Generation Credential”, now named Microsoft Passport. There hasn’t been much information on how the new credential system works, so I challenged myself to …
May 06 2015
Windows Server 2016 Technical Preview 2 Now Available for Download (ISO or VHD): https://www.microsoft.com/en-us/evalcenter/evaluate-windows-server-technical-preview What’s new in Active Directory Domain Services (AD DS) in Windows Server Technical Preview: Privileged access management Privileged access management (PAM) helps mitigate security concerns for Active Directory environments that are caused by credential theft techniques such pass-the-hash, spear phishing, and …
Apr 12 2015
The best way to discover services in an Active Directory environment is through what I call “SPN Scanning.” The primary benefit of SPN scanning for an attacker over network port scanning is that SPN scanning doesn’t require connections to every IP on the network to check service ports. SPN scanning performs service discovery via LDAP …