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Date: 11/08/2023
Four zero-day vulnerabilities in Microsoft Exchange were recently disclosed as part of Trend Micro’s Zero-Day Initiative. Note that these vulnerabilities did not meet Microsoft’s threshold for immediate servicing. Currently, the vulnerabilities are being tracked under ZDI IDs so Exchange administrators can be aware.
These vulnerabilities can be remotely exploited to execute code or view sensitive information. It is also important to note that authentication is required for exploitation. The vulnerabilities include ZDI-23-1578, ZDI-23-1581, ZDI-23-1579, and ZDI-23-1580. Widespread exploitation has not yet been observed by GreyCastle Security though this may change in the near future.
After disclosure, it was discovered that one of the vulnerabilities (ZDI-23-1578) can be mitigated by applying the August Security Updates. For other vulnerabilities, administrators should apply fixes immediately once they are released by Microsoft. It is also recommended that public access to web Exchange services be restricted, especially in a hybrid Microsoft 365 environment.
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QNAP Systems disclosed two critical command injection vulnerabilities affecting various versions of QTS on network-attached storage (NAS) devices. These vulnerabilities could be exploited by remote attackers to execute arbitrary commands on the affected systems. The vulnerabilities include CVE-2023-23368 (CVSS 9.8) and CVE-2023-2336 (CVSS 9.0).
Both vulnerabilities have the potential to allow remote attackers to execute commands on NAS devices, which are commonly used to store sensitive data. Exploitation of these vulnerabilities can lead to data theft, encryption, and potential ransom demands.
It is recommended that the following be performed:
Sources
On November 6th, 2023, Veeam released patches for four vulnerabilities. Products include Veeam ONE, Veeam Disaster Recovery Orchestrator, Veeam Availability Orchestrator, and Veeam Recovery Orchestrator.
The impact described in Veeam’s knowledge base article includes remote code execution and theft of password hashes. Expect threat actors to exploit these vulnerabilities to either escalate privileges in a compromised environment or corrupt backups as part of a ransomware deployment.
Apply patches to all impacted products. Review configuration, and implement best practices as described here: https://bp.veeam.com/vbr
Sources
The AvosLocker ransomware gang has been identified as targeting critical infrastructure in the U.S. The gang employs ransomware-as-a-service (RaaS) operations so initial attack vectors may vary. However, GreyCastle Security has observed external vulnerability exploitation and social engineering to be common attack vectors of ransomware groups.
AvosLocker leverages open-source tools and living-off-the-land tactics such as RDP, PowerShell, Windows batch scripts. Cobalt Strike activity may also be observed for command and control. The threat actor may also leverage tools such as Rclone or Filezilla for data exfiltration.
The Cybersecurity and Infrastructure Security Agency (CISA) recommends the following to mitigate AvosLocker ransomware:
Sources
https://thehackernews.com/2023/10/fbi-cisa-warn-of-rising-avoslocker.html
https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-284a
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Ho Chin is Chief Financial Officer at GreyCastle Security. In this role, Ho leads Finance, HR, IT and Professional Development. As part of the executive leadership team, Ho works to establish the company’s overall strategy and ensure proper execution of the supporting initiatives pertaining to the above areas of responsibility.
Prior to joining GreyCastle Security, Ho led finance and administrative functions at multiple private equity and venture-backed portfolio companies across multiple industries. Ho holds a bachelor’s degree in Accounting from Pennsylvania State University in Centre County, Pennsylvania and a master’s degree in Business Administration from the Wharton School of Business at the University of Pennsylvania in Philadelphia, Pennsylvania.
Michael Stamas is an entrepreneur, board member, Vice President and a founder of GreyCastle Security. With more than two decades of experience in the technology sector, Mike pairs his management and business development skills with a deep understanding of cybersecurity. Mike brings a unique brand of risk-based advising to GreyCastle clients and prospects.
Mike holds certifications in numerous security and technology related areas, including the Department of Homeland Security and other security technologies like Symantec, Cisco and Microsoft.
Mike plays an active role in his community and serves as a board member and Vice President of InfraGard Albany as well as an advisory board position with the Capital Region YMCA.
Mike has been recognized for his numerous achievements through various honors including the Albany Business Review’s prestigious 40 Under 40 award.
Dan Kalil is Chief Executive Officer (CEO) and Board Chairman at GreyCastle Security. In this role, Dan provides vision, leadership and strategies that drive GreyCastle Security’s position as an industry leader. With an emphasis on customer success, Dan’s profitable growth model leverages a customer-centric business approach that balances employee wellbeing and social responsibility.
Prior to becoming CEO, Dan served as the company’s Chief Strategy Officer, during which he supported multiple acquisitions and helped the organization achieve substantial sales growth. In addition to serving as CEO at GreyCastle Security, Dan continues to hold the position of Chief Commercial Officer (CCO) at Assured information Security (AIS) in Rome, New York, a company he co-founded in 2001.
Over the course of the last 22 years, Dan has been committed to advancing the state of cybersecurity and has played an instrumental role in the identification and development of critical, next-generation cyber capabilities. He has held positions in almost every facet of cybersecurity, beginning as a computer forensic examiner and progressing through the management and executive leadership ranks. In addition to co-founding AIS, Dan has facilitated multiple cybersecurity startups, raised investment capital and has served in various lead and support roles toward the acquisition of five companies in the last eight years.
Dan has a bachelor’s degree in Cybersecurity and a master’s degree in Cybersecurity from Utica College in Utica, New York.
Dan Maynard serves as GreyCastle Security’s Chief Operating Officer, where he currently leads Sales, Marketing and Legal.
Dan has enjoyed a 30+ year career in the Information Technology and Telecommunications industry, during which time he has held various leadership positions for organizations such as Rochester Tel/RCI, Citizens Communications (Frontier), PAETEC Communications, IntegraOptics, tw telecom/Level3 and Centurylink.
In addition to various voice and data technology platforms, he possesses a strong background in leadership development, sales and marketing leadership, transformational leadership and strategic planning. Dan has a thirst for knowledge and as a committed lifelong learner, he encourages and supports professional development initiatives for his teams and continues his involvement with Vistage International.
Dan holds a bachelor’s degree in Biology from Lafayette College in Easton, Pennsylvania, where he was selected as a member of their Athletic Hall of Fame in 2016.
When not at work, Dan enjoys traveling, golfing, attending Utica Comets hockey games and relaxing in the Adirondacks on beautiful Canada Lake with family and friends.
Dan Didier is the Vice President of Solutions and board member at GreyCastle Security.
Dan has been a cybersecurity practitioner for more than 20 years and uses his knowledge and experience to develop cybersecurity solutions that ensure readiness and preparedness.
Dan received his bachelor’s degree in Telecommunications from SUNY Polytechnic Institute in Utica, New York, and graduated Summa Cum Laude with a master’s degree in Information Assurance from Norwich University in Northfield, Vermont.
Our Computer Incident Response Teams (CIRTs) have responded to hundreds of breaches, intrusions, malware infections, thefts, employee investigations, fraud cases and other incidents. Our highly-certified experts have extensive experience in command, coordination and correction of incidents in nearly every industry throughout North America, from local businesses to Fortune 500 international conglomerates.
800-403-8350Francesca LoPorto-Brandow is Director of Culture at GreyCastle Security. In this role, Francesca leads all social responsibility efforts and partnerships and develops effective strategies that promote organizational-wide behaviors and attitudes consistent with a culture of safety, inclusion, teamwork, motivation and high-performance.
Prior to this role, Francesca was Director of People & Culture at GreyCastle and with her leadership, the company’s culture has been recognized by Inc. Magazine as a Nationally recognized Best Workplace, Albany Business Review Best Places to Work and Albany Times Union Top Workplaces.
Before joining GreyCastle Security, Francesca worked as an OD consultant and focused on strategic culture change at The Kaleel Jamison Consulting Group, Inc. for more than six years. There, she facilitated client education sessions, coached leaders and teams, developed and executed consulting interventions and served as strategy project leader on various client engagements. Her work has taken her into Fortune 100 companies and across borders including Panama, Singapore and beyond.
Francesca is a Lean Six Sigma–certified Green Belt, a proud YWCA-GCR board member and in 2013, she coordinated and emceed the inaugural TEDx Troy—a livestream of TEDCity 2.0. Since 2012, she has coordinated and emceed the Troy 100 Forum, a biannual forum for government, religious and community leaders to discuss issues vital to the future of Troy, New York.
Bilingual in English and Italian, Francesca holds a bachelor’s degree in Management and Technology from the Rensselaer Polytechnic Institute’s Lally School of Management & Technology. She was awarded Cybersecurity Recruiter of the year North America in 2017 by the Cybersecurity Excellence Awards.
Jamie Aiello is Senior Vice President of Services and Product Management at GreyCastle Security. In this position, Jamie is responsible for leading a high performing and well-balanced team that is ultimately responsible for the identification, selection, execution and successful performance of our company’s diverse portfolio of cybersecurity offerings.
Prior to joining GreyCastle Security, Jamie has held leadership positions with Annese and Associates, ConvergeOne and BlueSky IT Partners with a focus on delivering cost effective information technology solutions for companies across multiple verticals.
Jamie holds a bachelor’s degree in Political Science from Le Moyne College in Syracuse, New York, a master’s degree in Business Administration from Gardner-Webb University in Boiling Springs, North Carolina and a master’s degree in Computer Information Systems from University of Phoenix in Phoenix, Arizona.
