Active Directory Security
Categories
- Active Directory Backup & Recovery (62)
- Active Directory Security (213)
- AD Security 101 (17)
- Community Tools (19)
- Directory Modernization (9)
- From the Front Lines (69)
- Hybrid Identity Protection (68)
- Identity Attack Catalog (27)
- Identity Threat Detection & Response (143)
- Our Mission: Be a Force for Good (14)
- Purple Knight (5)
- Semperis University (1)
- The CISO's Perspective (16)
- Threat Research (68)
How Attackers Can Use Active Directory Primary Group Membership for Defense Evasion
- Yuval Gordon
Identity systems—particularly Active Directory, which is the primary identity store for most businesses—are constantly under attack by cybercriminals because they are the gateway to an organization’s critical information systems, including valuable customer data. Here we'll explore a little-known Discretionary Access Control List (DACL) tactic that attackers can use to hide…
Identity Attack Watch: August 2021
- Semperis Research Team
Cyberattacks targeting Active Directory are on the upswing, putting pressure on AD, identity, and security teams to monitor the constantly shifting AD-focused threat landscape. To help IT pros better understand and guard against attacks involving AD, the Semperis Research Team offers this monthly roundup of recent cyberattacks that used AD…
Now’s the Time to Rethink Active Directory Security
- Guido Grillenmeier
Note: This article was first published in the July 2021 issue of the monthly newsletter Network Security, and appears here with the permission of the publisher. Winding back the clock 21 years to the turn of the millennium would be astrange experience, given the world we live in today. Even…
Detecting and Mitigating the PetitPotam Attack on Windows Domains
- Ran Harel
Update August 10, 2021: Microsoft released a patch that partially covers the initial PetitPotam authentication coercion through MS-EFSR. Fresh on the heels of PrintNightmare and SeriousSam, we now have another high-impact attack vector on Windows domains that is relatively easy to carry out and difficult to mitigate. What is now…
Identity Attack Watch: July 2021
- Semperis Research Team
Cyberattacks targeting Active Directory are on the upswing, putting pressure on AD, identity, and security teams to monitor the constantly shifting AD-focused threat landscape. To help IT pros better understand and guard against attacks involving AD, the Semperis Research Team offers this monthly roundup of recent cyberattacks that used AD…
Applying the MITRE ATT&CK Framework to Your Active Directory
- Nikolay Chernavsky
I recently had the pleasure of teaming up with Ran Harel, principal security product manager at Semperis for a webinar focused on making the MITRE ATT&CK Framework relevant and actionable for organizations seeking to ramp up their security. In the webinar we zeroed in on the most attacked target –…
Time to Leave ADFS Behind for Authenticating in Hybrid Environments?
- Doug Davis
One of the biggest challenges of adopting cloud services is extending identity policies from the on-premises environment into the cloud. In an Active Directory (AD) environment, it might be tempting to turn to Active Directory Federation Services (ADFS), which has long been the answer for providing single sign-on capabilities to…
What You Need to Know about PrintNightmare, the Critical Windows Print Spooler Vulnerability
- Ran Harel
Update July 6, 2021: Microsoft has released a patch for CVE 2021-34527, available here. Another week, another critical vulnerability. The latest critical security flaw is dubbed “PrintNightmare,” a reference to two vulnerabilities in the Windows Print Spooler service—CVE 2021-1675 and CVE 2021-34527, published between June and July 2021. CVE 2021-1675…
