Preventing threat actors from taking advantage of Bloodhound 3.0
Reading Time: < 1 | Published: July 8, 2020 in Attivo News
Tags: Active Directory, Blog, passwords, security audit
Recently SPECTEROPS announced the release of Bloodhound 3.0 with three new attack methods — gMSA Control, OU Control & SID History. This article discusses how one can protect one’s Active Directory from these new attack methods.
…
Ask any Active Directory admins, and they would agree that service accounts have always been a problem from all aspects, including Manageability, Accountability, and, most importantly, Security. In every IT audit, Service Accounts are one of the top risks that auditors flag because passwords do not expire, unconstrained delegation happens, the accounts have extended privileges, and many other reasons. Making things worse is a new Kerberos attack method researchers recently discovered called a Silver Ticket attack. In 2012 Microsoft came up with a new concept called gMSA, which addressed most of the problems mentioned above. Domain controllers manage the passwords, which by default, change every 30 days automatically, uses 128-character strong passwords, and eliminates Silver Ticket attacks.
Recently one of the Bloodhound developers posted a tool (GMSAPasswordReader) on GitHub, which can read the password blob from a gMSA account. The tool can retrieve the NT hash of the gMSA account, which attackers can reuse. This article does not discuss the attack method, as the authors of Bloodhound have already documented it. It instead looks at what measures one can take to protect gMSA accounts.
Share on:
Continue Reading
Free Active Directory Assessment
Get Visibility Into Privilege And Service Account Exposure
For a limited time, Attivo Networks is providing free Active Directory Security Assessments to demonstrate how ADAssessor provides unprecedented and continuous visibility to AD vulnerabilities.
Try Our Endpoint Detection Net (EDN) for Free
FAST AND EASY
Free use offer of our Award-winning security solution to prevent attackers from lateral movement, credential theft, and privilege escalation, fast and easy.
Newsletter Signup
ADSecure 90-Day Free Trial
GET PROTECTION AGAINST UNAUTHORIZED ACCESS TO ACTIVE DIRECTORY
- Hide and deny access to AD objects
- Get alerted on unauthorized queries
- Attack details easily viewable in dashboard
- Your data remains on-premise