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May 11, 2022
CVE-2022-26923 - Active Directory Domain Services Elevation of Privilege Vulnerability
THE THREAT Microsoft has disclosed a new vulnerability impacting Active Directory Certificate Services (ADCS) tracked as CVE-2022-26923 (Active Directory Domain Services Elevation of Privilege Vulnerability). If exploited successfully, an authenticated attacker can escalate privileges in environments where ADCS is running on the domain. eSentire is aware of technical details and tooling [2] for…
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eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 1200+ organizations in 75+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
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Blog — Jun 18, 2019

Who's Watching the Watchers?

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As seen in Infosecurity Magazine on June 17, 2019.

Supply chain risk is gaining prominence, and organizations must pay closer attention to this type of risk. According to Resilinc’s Annual EventWatch Report, global supply chain risk events increased 36% in 2018. This includes, for example, nation state attacks against law firms and the weaponization of a leading remote administrative tool used by many security firms. The consequences of a compromised vendor system can be huge for an organization – even more so when the company cannot identify how far the infection has spread yet is held accountable for the outcome.

Kaseya is a prime example. Discovered by security researchers, the recent exploitation of Kaseya Ltd.’s Virtual Systems Administrator (VSA) agent was used to gain access to multiple customer assets since January 2018. Unknown threat actors exploited the Kaseya software to deploy Monero cryptocurrency miner software across compromised client networks. Indicators of this attack method were identified over multiple client networks. Since the initial discovery, Kaseya was quick to release updates to remove this exploit.

Still, this transmission method makes it virulent and extremely dangerous. Consider another way of looking at this incident. Kaseya’s VSA agent is widely used by managed security service providers – the vendors tasked with protecting their clients, who became the unwitting agents spreading malware to the very same clients they are hired to protect. This is ironic at best and disturbing at worst. Who is watching the watchers?

Kaseya should serve as a cautionary tale that teaches companies to scrutinize the security standards of their vendors – including and especially their security vendors. Today, there is a three-dimensional web of connection. Vendors have vendors, and clients are vendors to their clients, and this relationship stretches out in an ever-expanding universe of potential risk.

There are numerous frameworks including GDPR and ISO that address vendors. Perhaps the best guidance comes from the U.S. Department of Financial Services, in its New York Cybersecurity Rules and Regulations (NYCRR 500). Governed financial institutions have to implement NYCRR500 section 11, the most stringent controls regarding their vendors that include:

It’s a best practice to review the DFS rules regarding third party vendors. DFS doesn’t just apply to US-based companies – it also applies to international banks and other entities licensed to operate in New York. Even if you aren’t governed by the DFS, their recommendations cover the core cybersecurity responsibilities between vendor and client, and are a good baseline from which to start.

Systemic attacks like the one against Kaseya are not fully evolved. Today, we see the agnostic systemic vulnerabilities that exploit infrastructure tools and software, be it remote access administrative tools or cloud-based accounting software. Tomorrow will bring the next generation, specializing in infecting its homogenous host through very targeted assaults on the core industry-centric tools without which the industry cannot operate.

These are the types of targeted attacks cyber-criminals will pivot toward. The reason is simple: economies of scale. It’s more economical and efficient to exploit one victim and spread from there to hundreds of the victim’s clients. There’s a way to prevent these attacks: watch your watchers. Are you watching yours?

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eSentire

eSentire is the Authority in Managed Detection and Response, protecting the critical data and applications of 1200+ organizations in 75+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events. Combining cutting-edge machine learning XDR technology, 24/7 Threat Hunting, and proven security operations leadership, eSentire mitigates business risk, and enables security at scale. The Team eSentire difference means enterprises are protected by the best in the business with a named Cyber Risk Advisor, 24/7 access to SOC Cyber Analysts & Elite Threat Hunters, and industry-leading threat intelligence research from eSentire’s Threat Response Unit (TRU). eSentire provides Managed Risk, Managed Detection and Response and Incident Response services. For more information, visit www.esentire.com and follow @eSentire.