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Sophos Uncovers Backdoors Attackers Leverage to Attack VMware Horizon servers, Sophos Finds

Sophos Finds Three Backdoors, Possibly Delivered by Initial Access Brokers, and Four Cryptominers Targeting Unpatched VMware Horizon Servers, reports SANDRA ANI

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Log4J

Sophos, a global leader in next-generation cybersecurity, today released findings on how attackers are using the Log4Shell vulnerability to deliver backdoors and profiling scripts to unpatched VMware Horizon servers, paving the way for persistent access and future ransomware attacks.

A new technical paper, “Horde of Miner Bots and Backdoors Leveraged Log4J to Attack VMware Horizon Servers,” details the tools and techniques used to compromise the servers and deliver three different backdoors and four cryptominers. The backdoors are possibly delivered by Initial Access Brokers.

Log4Shell is a remote code execution vulnerability in the Java logging component, Apache Log4J, which is embedded in hundreds of software products. It was reported and patched in December 2021.

“Widely used applications such as VMware Horizon that are exposed to the internet and need to be manually updated, are particularly vulnerable to exploitation at scale,” said Sean Gallagher, senior security researcher at Sophos. “Sophos detections reveal waves of attacks targeting Horizon servers, starting in January, and delivering a range of backdoors and cryptominers to unpatched servers, as well as scripts to collect some device information. Sophos believes that some of the backdoors may be delivered by Initial Access Brokers looking to secure persistent remote access to a high value target that they can sell on to other attackers, such as ransomware operators.”

Cybersecurity by Sophos

Cybersecurity by Sophos

The multiple attack payloads Sophos detected using Log4Shell to target vulnerable Horizon servers include:

  • Two legitimate remote monitoring and management tools, Atera agent and Splashtop Streamer, likely intended for malicious use as backdoors
  • The malicious Sliver backdoor
  • The cryptominers z0Miner, JavaX miner, Jin and Mimu
  • Several PowerShell-based reverse shells that collect device and backup information

Sophos’ analysis revealed that Sliver is sometimes delivered together with Atera and PowerShell profiling scripts and is used to deliver the Jin and Mimu variants of the XMrig Monero miner botnet.

According to Sophos, the attackers are using several different approaches to infect targets. While some of the earlier attacks used Cobalt Strike to stage and execute the cryptominer payloads, the largest wave of attacks that began in mid-January 2022, executed the cryptominer installer script directly from the Apache Tomcat component of the VMware Horizon server. This wave of attacks is ongoing.

“Sophos’ findings suggest that multiple adversaries are implementing these attacks, so the most important protective step is to upgrade all devices and applications that include Log4J with the patched version of the software. This includes patched versions of VMware Horizon if organizations use the application in their network,” said Gallagher. “Log4J is installed in hundreds of software products and many organizations may be unaware of the vulnerability lurking within their infrastructure, particularly in commercial, open-source or custom software that doesn’t have regular security support. And while patching is vital, it won’t be enough if attackers have already been able to install a web shell or backdoor in the network. Defense in depth and acting upon any detection of miners and other anomalous activity is critical to avoid falling victim to such attacks.”

For further information read the article “Horde of Miner Bots and Backdoors Leveraged Log4J to Attack VMware Horizon Servers” on Sophos News.

Sophos has closely monitored attack activity related to the Log4Shell vulnerability and has published a number of in depth technical and advisory reports, including  Log4Shell Hell – Anatomy of an Exploit Outbreak, Log4Shell Response and Mitigation Recommendations, Inside the Code: How the Log4Shell Exploit Works, and Log4Shell: No Mass Abuse, But No Respite, What Happened?

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Sophos Partners with Tenable to Launch New Sophos Managed Risk Service

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Sophos Partners with Tenable

. New Fully Managed Solution Provides Visibility, Risk Monitoring, Prioritization, Investigation, and Proactive Notification to Prevent Cyberattacks  

April 4, 2024 – Sophos, a global leader of innovative security solutions that defeat cyberattacks, today announced a strategic partnership with Tenable, the Exposure Management company, to provide Sophos Managed Risk, a worldwide vulnerability and attack surface management service.

The new service features a dedicated Sophos team that leverages Tenable’s exposure management technology and collaborates with the security operations experts from Sophos Managed Detection and Response (MDR) to provide attack surface visibility, continuous risk monitoring, vulnerability prioritization, investigation, and proactive notification designed to prevent cyberattacks.

The modern attack surface has expanded beyond traditional on-premises IT boundaries, with organizations operating frequently unknown numbers of external and internet-facing assets that are unpatched or under protected, leaving them vulnerable to cyberattackers.

This is evident in the newest Sophos Active Adversary Report, also released, which identifies three tasks that organizations must prioritize to minimize the risk of brazen intrusions that lead to ransomware or other types of attacks.

These include closing exposed Remote Desktop Protocol (RDP) access, enabling multi-factor authorization and patching vulnerable servers, all of which were top entry points in breaches handled by Sophos Incident Response in 2023.

The Sophos Managed Risk service can assess an organization’s external attack surface, prioritize the riskiest exposures, such as open RDP, and provide tailored remediation guidance to help eliminate blind spots and stay ahead of potentially devastating attacks.

“Sophos and Tenable are two industry security leaders coming together to address urgent, pervasive security challenges that organizations continuously struggle to control. We can now help organizations identify and prioritize the remediation of vulnerabilities in external assets, devices and software that are often overlooked. It is critical that organizations manage these exposure risks, because unattended, they only lead to more costly and time-consuming issues and are often the root causes of significant breaches,” said Rob Harrison, senior vice president for endpoint and security operations product management at Sophos. “We know from Sophos’ worldwide survey data that 32% of ransomware attacks start with an unpatched vulnerability and that these attacks are the most expensive to remediate. The ideal security layers to prevent these issues include an active approach to improving security postures by minimizing the chances of a breach with Sophos Managed Risk, Sophos Endpoint, and 24×7 Sophos MDR coverage.”

“While the latest zero day may dominate the headlines, the biggest threat to organizations, by a large margin, is still known vulnerabilities – or vulnerabilities for which patches are readily available,” said Greg Goetz, vice president of global strategic partners and MSSP, Tenable. “A winning approach includes risk-based prioritization with context-driven analytics to proactively address exposures before they become a problem. Sophos Managed Risk, powered by the Tenable One Exposure Management Platform, delivers outsourced preventive risk management, enabling organizations to anticipate attacks and reduce cyber risk.”

Specific key benefits of Sophos Managed Risk include:

  • External Attack Surface Management (EASM): Advanced identification and classification of internet-facing assets, such as web and email servers, web applications, and public-facing API endpoints
  • Continuous monitoring and proactive notification of high-risk exposures: Proactive notification when a new critical vulnerability is identified in an organization’s internet-facing assets
  • Vulnerability prioritization and identification of new risks: Swift detection of high-risk and zero-day vulnerabilities, followed by real-time notification to ensure critical internet-facing assets are promptly identified, investigated and responded to by order of importance

“One of the biggest challenges organizations face when improving their security posture is prioritizing what to handle first. This type of guidance helps solve that issue and reduces the workload for security teams tasked with tackling vulnerability and exposure management,” said Craig Robinson, research vice president of Security Services, IDC. “Solutions such as Sophos Managed Risk can be a differentiator by enabling overwhelmed teams to take a more holistic approach to continuous monitoring and threat management.”  

Sophos Managed Risk is available as an extended service with Sophos MDR, which already protects more than 21,000 organizations globally. The Sophos Managed Risk team is Tenable-certified and works closely with Sophos MDR to share essential information about zero-days, known vulnerabilities and exposure risks to assess and investigate possibly exploited environments.

“Sophos Managed Risk simplifies the difficult and resource consuming task of identifying vulnerabilities, really understanding the extent of risk exposure, and prioritizing necessary remediations,” said Kieron Stone, cybersecurity business development manager at Phoenix Software Ltd. “As a trusted managed service provider (MSP), this is a service we’re proud to stand behind, and nearly all our customers using it have already discovered significant vulnerabilities that they were previously unaware of. For organizations that don’t already have a well-defined vulnerability patching cadence, this is a must-have service for the identification of vulnerabilities and building that schedule; and for organizations that are already managing vulnerabilities, it’s a second set of eyes for added peace of mind that they’re not missing anything.”

Organizations benefit through regular interaction, including scheduled meetings with Sophos experts to review recent discoveries, insights into the current threat landscape, and recommendations for remediation and prioritizing actions. Additionally, organizations can initiate inquiries via the Sophos Central platform, allowing users to directly engage with the Sophos Managed Risk team for tailored support, reports and to review their latest prioritized alerts.

“You can’t fix what you can’t see. Sophos Managed Risk is shining a light on areas of exposure that require remediation in order to keep customers protected. Combining Sophos’ elite MDR experts with Tenable’s industry-leading exposure management technology gives us a full picture view of vulnerabilities with the guidance we need to minimize risk,” said Brooks Roy, president at Communications Consulting, Inc. “The real value add for us as a channel partner is having the ability to easily manage Sophos Managed Risk’s prioritized alerts across our customer base on the Sophos Central dashboard.”

Sophos Managed Risk is available with a term license through Sophos’ global network of channel partners and Managed Service Providers (MSPs). A Sophos MSP Flex version will be available in 2024.

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inq.Digital Supports Payments Forum Nigeria [PAFON 1.0]

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PAFOn 1.0
PAFON SPEAKERS

Inq. Digital Nigeria Limited has been announced as a sponsor of Payments Forum Nigeria [PAFON 1.0] maiden edition holding this Thursday in Lagos.

inq. Digital Nigeria Limited, a subsidiary of inq. Group is an emerging leading digital and cloud solutions provider that delivers simpler seamless solutions to complex business challenges.

With offices in Lagos, Abuja, Port Harcourt and Kano, inq. provides reliable and affordable Intelligent Connectivity, SDN/NFV, Cloud and Digital services (including Edge –AI) for Nigerian businesses including those in the payment space.

Participation is FREE, however, pre-registration is required: https://bit.ly/4c4N19H.

Speaking ahead of Payments Forum Nigeria [PAFON 1,0] scheduled to take place at Oriental Hotel, Lekki Road, Lagos on Thursday, March 21, 2024 by 9am under the theme: “Payments: Trust, Security and Privacy in AI Era”, Mr. Chike Onwuegbuchi, the co-founder of TechCastle Foundation, the organisers, said the goal is to enable information exchange and knowledge sharing on key industry insights issues amongst key stakeholders, with the objective of ensuring a collaborative and proactive approach to push for policies that enable growth, tackling/mitigating fraud and limiting occurrences and losses.

Speakers

The following speakers are lined up for the Forum: Chibuzo Efobi, Director, Payments System Management, Central Bank of Nigeria (CBN); Festus Amede, Chairman, Committee of Chief Information Security Officers of Nigerian Financial institutions (CCISONFI; Dr. Adewale Peter Obadare, Chief Visionary Officer (CVO), Digital Encode Limited; Adetokunbo Omotosho, Chief Executive Officer, Cybervergent; Roosevelt Elias, Founder, Payble; Ikenna Ndugbu, chief compliance officer, Moniepoint MFB, and Peter Evbota, Sales Director at inq. Digital Nigeria Limited.

Payments Forum Nigeria is organised by TechCastle Foundation and sponsored by: inq. Digital Nigeria Limited, Cybervergent, Moniepoint, Digital Encode Limited, Payble with support from the Central Bank of Nigeria (CBN).

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S Mobile Tech Hub Opens Registration to Entrepreneurs in Southeast

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Kingsely Adonu, founder and CEO, S Mobile Group

•⁠ ⁠500 successful candidates to get starter-packs

•⁠ ⁠Rolls our Free Data, Airtime to Civil Servants, Students, others

S Mobile Tech Hub, an offspring of S Mobile Group has open applications to technology entrepreneurs in the Southeast Nigeria.

S Mobile Tech Hub was recently conceived by Mr. Kingsley Adonu, a visionary entrepreneur and CEO/Founder S Mobile Group, who aims to manifest the Group’s deliberate programmes towards building a dynamic and vibrant startup ecosystem in eastern region of the country.

APPLY by visiting www.smobilegroup.com to register.

Speaking against this backdrop, Mr. Adonu, said that even against tremendous challenges faced by the youth in the Southeast, they must be actively engaged in digital skills development in order to eschew social vices and make positive contributions towards maintaining peace and progress in the region.

“Unfortunately, a lot of our young people are facing numerous barriers to participating in formal and informal sectors today. In December 2015, the United Nations Security Council adopted UNSCR 2250 on Youth, Peace and Security. The resolution was the first to recognise the important role young people can play in preventing conflicts, and sustaining peace.

“It is on this premise and more that S Mobile is thinking out of the box by extending digital skills programmes to empower the youth to be more economically relevant. This will also go a long way in supporting the efforts of the Governors in the Southeast who are not resting on their oars until we have crime-free society with less poverty index.

“S Mobile Tech Hub has been positioned as a platform for entrepreneurs to leverage trends to accelerate their skills and innovation especially in the areas of artificial intelligence, robotics, big data, etc., which have become embedded in our daily lives.

“We are rolling out free data and airtime to civil servants, students, farmers and other entrepreneurs, for connecting with MTN Nigeria services.

Also during the cohort 1 of S Mobile Tech Hub programme 500 successful technology entrepreneurs across the Southeast region will be sponsored with the starter-tools to live their dreams.

“Together, let’s turn technology into your personal pathway to empowerment, growth, and societal well-being. Don’t just dream about a brighter tomorrow; let’s build it together today!”, the company said on Wednesday.

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