For most of 2019, I was digging into Office 365 and Azure AD and looking at features as part of the development of the new Trimarc Microsoft Cloud Security Assessment which focuses on improving customer Microsoft Office 365 and Azure AD security posture. As I went through each of them, I found one that was …
Tag: ActiveDirectory
Jul 06 2016
DEF CON 24 (2016) Talk – Beyond the MCSE: Red Teaming Active Directory
This August at DEF CON 24, I will be speaking about Active Directory security evaluation in my talk “Beyond the MCSE: Red Teaming Active Directory”. This talk is focused on the Red side of AD security, specifically how to best evaluate the security of AD and quickly identify potential security issues. Whether you perform “Red …
Mar 14 2016
Sneaky Active Directory Persistence #17: Group Policy
The content in this post describes a method through which an attacker could persist administrative access to Active Directory after having Domain Admin level rights for about 5 minutes. Complete list of Sneaky Active Directory Persistence Tricks posts This post explores how an attacker could leverage the built-in Active Directory management capability called Group Policy …
Jan 22 2016
ADSecurity.org in the Press!
IT World Canada reached out to me recently to help with an article on Active Directory attack & defense. Read the article: “IT not doing enough to secure Active Directory, says expert.” IIT World Canada also requested comments for a second story titled: “22 tips for preventing ransomware attacks“.
Jan 05 2016
Mimikatz Update Fixes Forged Kerberos Ticket Domain Field Anomaly – Golden Ticket Invalid Domain Field Event Detection No Longer Works
In late 2014, I discovered that the domain field in many events in the Windows security event log are not properly populated when forged Kerberos tickets are used. The key indicator is that the domain field is blank or contains the FQDN instead of the short (netbios) name and depending on the tool used to …
Jan 01 2016
Attack Methods for Gaining Domain Admin Rights in Active Directory
There are many ways an attacker can gain Domain Admin rights in Active Directory. This post is meant to describe some of the more popular ones in current use. The techniques described here “assume breach” where an attacker already has a foothold on an internal system and has gained domain user credentials (aka post-exploitation). The …
Dec 31 2015
Cracking Kerberos TGS Tickets Using Kerberoast – Exploiting Kerberos to Compromise the Active Directory Domain
Microsoft’s Kerberos implementation in Active Directory has been targeted over the past couple of years by security researchers and attackers alike. The issues are primarily related to the legacy support in Kerberos when Active Directory was released in the year 2000 with Windows Server 2000. This legacy support is enabled when using Kerberos RC4 encryption …
Nov 30 2015
Real-World Example of How Active Directory Can Be Compromised (RSA Conference Presentation)
At the RSA Conference in Abu Dhabi earlier this month, Stefano Maccaglia (Incident Response Consultant with RSA) presented “Evolving Threats: dissection of a Cyber-Espionage attack.” The slides for this talk are available on the RSA Conference site (UPDATE: RSA removed the slides from their site, Presentation Slides on Yumpu). This post covers and adds some …