pass the ticket laptop Giacomo Lanzi

Pass the Ticket: how to mitigate it with a SOCaaS

Estimated reading time: 5 minutes

Every year the number of attacks that threaten the security of devices, computer systems, servers and network infrastructures is growing steadily. This is done by taking advantage of the vulnerabilities present in these systems. Among the many types of attacks, particular attention must be paid to the pass the ticket (PTT) attack.

With a pass the ticket attack it is possible to take advantage of the Kerberos network protocol, present in all major operating systems, to access a user’s session without having his login credentials. An attack of this type can be difficult to detect and is usually able to bypass the most common system access controls.

pass the ticket laptop

Pass The Ticket: what it is and how it works

Kerberos

Before understanding in detail what a PTT attack is and how it works, it is advisable to clarify the Kerberos network protocol since an attack of this type uses this protocol. Kerberos is a network protocol designed by MIT in the 1980s and became a standard IETF in 1993. It is used for strong authentication between different terminals through a symmetric key encryption system, without transmitting any passwords.

The advantage of using the Kerberos protocol lies in its strong authentication system between client and server. This makes it very effective against phishing and “ man in the middle ” attacks.
Kerberos is integrated into all major operating systems belonging to well-known companies such as Microsoft, Apple, Red Hat Linux and many more.

With a pass the ticket attack it is possible to exploit Kerberos authentication to gain access to a user account. The consequences that such an event could entail are not are to be underestimated. Among the many imaginable scenarios, for example, there could be the possibility that the compromised account enjoys high administrative privileges thus guaranteeing the hacker full access to resources.

The attack

A pass the ticket attack allows you to gain privileged access to network resources without having to use any user passwords . Here’s how: In Active Directory, a Ticket Granting Ticket (TGT) serves to prove that a user is just who he says to be. Through some tools and techniques, a hacker could collect these tickets and use them to request Ticket Granting Services (TGS) in order to access resources present in other parts of the network.

A PTT attack could involve risks even if the compromised account does not have particular administrative privileges since the hacker, through the Lateral Movement, may be able to gain access to other accounts and devices.

The difference between pass the ticket and an attack pass the hash lies in the fact that the former exploits TGT tickets that have an expiration of a few hours, while the latter uses NTLM hashes that change only in case a user decides to change his password. A TGT ticket must be used within its expiration time or renewed for a longer period of time.

How to Defend and Prevent a Pass The Ticket Attack

Keeping a network and the devices connected to it safe is a very important factor. You must always have protocols and software that are able to guarantee effective protection from all kinds of threats , with up-to-date systems that keep sensitive information safe. Enterprises can take advantage of endpoint detection and response technologies. Local detection of multiple tickets used for the same session will be possible.

Account case without-privileges

In the event of a pass the ticket attack, if the compressed account from which the TGT or TGS was stolen was a low-privilege account, the mitigation could be quite simple. Just reset the user’s Active Directory password. Such an action would invalidate the TGT or TGS, preventing the hacker from generating new tickets.

Case-account with privileges

Conversely, if the PTT attack compromised a privileged account, limiting the damage is much more difficult. In these cases, companies could respond to the attack by resetting the Kerberos TGT service to to generate a new signing key, making sure to delete the compromised key.

Next you need to drill down into Kerberos logs and Active Directory information to investigate and find out which network resources have been compromised. In this way it is also possible to understand which data may have been stolen. The technology SIEM allows organizations to assimilate, analyze and analyze this data.

Pass the ticket User privileges

Protection from attack

To ensure complete protection of an infrastructure, also preventing pass the ticket attacks, it is good to use valid detection technologies such as UEBA and SIEM. In fact, it is possible to prevent Pass The Ticket attacks by analyzing the behavior of users and entities. The solution UEBA , in these cases, would ensure the quick identification of any compromised account, blocking it in order to mitigate the damage.

Some software SIEM also allow not only to analyze traditional logs but are also able to provide an accurate analysis of security , analyzing the behavior of the network and users in order to detect promptly the presence of any threats to the infrastructure.

Conclusions

We have seen what a pass the ticket attack is and how companies can adopt specific solutions to intercept the dangers and anomalies of an entire IT infrastructure. This allows us to mitigate threats more effectively.

A complete solution, as we have seen, involves constant and granular communication monitoring . The solution we propose for this purpose is a SOCaaS .

If you want to know our dedicated security services, do not hesitate to contact us. You can use the button below, we will be happy to answer any of your questions.

Useful links:

Share


RSS

More Articles…

Categories …

Tags

RSS darkreading

RSS Full Disclosure

  • BACKDOOR.WIN32.DUMADOR.C / Remote Stack Buffer Overflow (SEH) April 19, 2024
    Posted by malvuln on Apr 19Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024 Original source: https://malvuln.com/advisory/6cc630843cabf23621375830df474bc5.txt Contact: malvuln13 () gmail com Media: twitter.com/malvuln Threat: Backdoor.Win32.Dumador.c Vulnerability: Remote Stack Buffer Overflow (SEH) Description: The malware runs an FTP server on TCP port 10000. Third-party adversaries who can reach the server can send a specially […]
  • SEC Consult SA-20240418-0 :: Broken authorization in Dreamehome app April 19, 2024
    Posted by SEC Consult Vulnerability Lab via Fulldisclosure on Apr 19SEC Consult Vulnerability Lab Security Advisory < 20240418-0 > ======================================================================= title: Broken authorization product: Dreamehome app vulnerable version:
  • MindManager 23 - full disclosure April 19, 2024
    Posted by Pawel Karwowski via Fulldisclosure on Apr 19Resending! Thank you for your efforts. GitHub - pawlokk/mindmanager-poc: public disclosure Affected application: MindManager23_setup.exe Platform: Windows Issue: Local Privilege Escalation via MSI installer Repair Mode (EXE hijacking race condition) Discovered and reported by: Pawel Karwowski and Julian Horoszkiewicz (Eviden Red Team) Proposed mitigation:...
  • CVE-2024-31705 April 14, 2024
    Posted by V3locidad on Apr 14CVE ID: CVE-2024-31705 Title : RCE to Shell Commands" Plugin / GLPI Shell Command Management Interface Affected Product : GLPI - 10.X.X and last version Description: An issue in Infotel Conseil GLPI v.10.X.X and after allows a remote attacker to execute arbitrary code via the insufficient validation of user-supplied input. […]
  • SEC Consult SA-20240411-0 :: Database Passwords in Server Response in Amazon AWS Glue April 14, 2024
    Posted by SEC Consult Vulnerability Lab via Fulldisclosure on Apr 14SEC Consult Vulnerability Lab Security Advisory < 20240411-0 > ======================================================================= title: Database Passwords in Server Response product: Amazon AWS Glue vulnerable version: until 2024-02-23 fixed version: as of 2024-02-23 CVE number: - impact: medium homepage: https://aws.amazon.com/glue/ found:...
  • [KIS-2024-03] Invision Community <= 4.7.16 (toolbar.php) Remote Code Execution Vulnerability April 11, 2024
    Posted by Egidio Romano on Apr 10------------------------------------------------------------------------------ Invision Community
  • [KIS-2024-02] Invision Community <= 4.7.15 (store.php) SQL Injection Vulnerability April 11, 2024
    Posted by Egidio Romano on Apr 10-------------------------------------------------------------------- Invision Community
  • Multiple Issues in concretecmsv9.2.7 April 11, 2024
    Posted by Andrey Stoykov on Apr 10# Exploit Title: Multiple Web Flaws in concretecmsv9.2.7 # Date: 4/2024 # Exploit Author: Andrey Stoykov # Version: 9.2.7 # Tested on: Ubuntu 22.04 # Blog: http://msecureltd.blogspot.com Verbose Error Message - Stack Trace: 1. Directly browse to edit profile page 2. Error should come up with verbose stack trace […]
  • OXAS-ADV-2024-0001: OX App Suite Security Advisory April 11, 2024
    Posted by Martin Heiland via Fulldisclosure on Apr 10Dear subscribers, We&apos;re sharing our latest advisory with you and like to thank everyone who contributed in finding and solving those vulnerabilities. Feel free to join our bug bounty programs for OX App Suite, Dovecot and PowerDNS at YesWeHack. This advisory has also been published at https://documentation.open-xchange.com/appsuite/security/advisories/html/2024/oxas-adv-2024-0001.html. […]
  • Trojan.Win32.Razy.abc / Insecure Permissions (In memory IPC) April 11, 2024
    Posted by malvuln on Apr 10Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2024 Original source: https://malvuln.com/advisory/0eb4a9089d3f7cf431d6547db3b9484d.txt Contact: malvuln13 () gmail com Media: twitter.com/malvuln Threat: Trojan.Win32.Razy.abc Vulnerability: Insecure Permissions (In memory IPC) Family: Razy Type: PE32 MD5: 0eb4a9089d3f7cf431d6547db3b9484d SHA256: 3d82fee314e7febb8307ccf8a7396b6dd53c7d979a74aa56f3c4a6d0702fd098 Vuln ID: MVID-2024-0678...

Customers

Newsletter

{subscription_form_1}