Archive for category: Network Security
VMware code execution flaw CVE-2021-21972/in Cyber-security, Network Infrastructure, Network Security, News, Uncategorized /by Carl Easterday
There is a newly disclosed code-execution vulnerability in VMware vCenter. VMware was quick to release a patch (within a day) and it can be found here.
The severity of this vulnerability as well as the fact that there are exploits available for both Windows and Linux servers, kicked off a flurry of mass scanning for vulnerable vCenter Servers.
Code execution, no authorization required
CVE-2021-21972 allows hacker with no authorization to upload files to vulnerable vCenter servers that are publicly accessible over port 443, researchers from security firm Tenable said. Successful exploits will result in hackers gaining unfettered remote code-execution privileges in the underlying operating system. The vulnerability stems from a lack of authentication in the vRealize Operations plugin, which is installed by default.
The flaw has received a severity score of 9.8 out of 10.0 on the Common Vulnerability Scoring System Version 3.0. Mikhail Klyuchnikov, the Positive Technologies researcher who discovered the vulnerability and privately reported it to VMware, compared the risk posed by CVE-2021-21972 to that of CVE-2019-19781, a critical vulnerability in the Citrix Application Delivery Controller
Ransomware and the impact to your business/in Cyber-security, Network Security, News /by Carl Easterday
Everyday, you read another story about how a company has been hit by a ransomware attack, which potentially can disrupt your business, services to your clients and livelihood of your employees.
Just last week it was announced another company, Forward Air, was hit by a ransomware attack, which disrupted services and impacted revenue. This attack was attributed to a group “Hades”. Forward Air, a trucking company from Tennessee, posted revenues of $1.4 billion in 2019 and employs more than 4300.
The ransomware note, resembles a similar note used by another ransomware group known as “REvil”, also known as “Sodin”.
This is a Sodinokibi variant that was first seen in early 2019. Sodinokibi is what is known as ransomware-as-a-service, basically a software package which is catered by underground vendors to threat actors providing them a ransomware platform tool.
Companies are limited in their ability to defend against this type of exploitation, especially if they do not have full time IT staff or contracted Managed Service Providers that focus on security. Your organization must follow the following guidelines to help mitigate your exposure:
- Patch aggressively so vulnerabilities are eliminated and access routes are contained
- Enable endpoints with tools that automatically detect and respond to infections before they become systemwide
- Enable network threat intelligence tools to detect anomalies in your network traffic
- Make sure emails are screened for malicious payloads and links
- Minimize access levels by employees to perform their job functions
If you have been hit by ransomware, or just want to assess your company’s state of preparedness, reach out to us to discuss your needs.
LMJ is a full service Managed Service Provider, with offices in Alaska and California.
Cyber-security Training can save the day!/in Computer Technology, Cyber-security, Network Security, Work from home /by Carl Easterday
So you have secured your business.
Firewall, VPN for work from home, radius authenticated WiFi or perhaps an RDS gateway for remote desktops. Anti-virus is up to date, patching is top notch, SaaS applications locked up with two-factor authentication.
What about educating your workforce? Although Phishing is only the 5th most common primary cause of security incidents (per the Verizon 2020 Data Breach Report), following Denial-of-Service (DoS), data loss, Command and Control, or misdelivery of email/data – when it comes to data breaches Phishing is still number one.
Without a solid training plan for your employees, your business is at greater risk to have data compromised.
Top areas to look out for:
- Social Engineering
- Stolen Credentials
- Malware (usually delivered via email)
According to Verizon, Phishing is the first step in about 20% of security incidents and plays a role in another 30% of secondary steps to gain access to your information.
Highlights by Sector
Financial and Insurance:
- 1,509 incidents, 448 with confirmed data disclosure
- What did they target, Web Applications, Miscellaneous Errors and Everything Else
represent 81% of breaches
- External to company (64%), Internal (35%), Partner (2%), Multiple (1%) (breaches)
- Financial motive (91%), Espionage (3%), Grudge (3%) (breaches)
- What did they get- Personal data (77%), Other (35%), Credentials (35%), Bank (32%)
- How do they solve the problem -Implement a Security Awareness and Training Program (CSC 17),
Boundary Defense (CSC 12), Secure Configurations (CSC 5, CSC 11)
- 798 incidents, 521 with confirmed data disclosure
- Miscellaneous Errors, Web Applications and Everything Else
represent 72% of breaches.
- External (51%), Internal (48%), Partner (2%), Multiple (1%) (breaches)
- Financial motive (88%), Fun (4%), Convenience (3%) (breaches)
- What did they get – Personal data (77%), Medical (67%), Other (18%), Credentials (18%)
- How do they solve the problem – Implement a Security Awareness and Training Program (CSC 17),
Boundary Defense (CSC 12), Data Protection (CSC 13)
But my company is too small for someone to try and get our data!
While differences between small and medium-sized businesses (SMBs) and large organizations remain, the movement toward the cloud and its myriad web-based tools, along with the continued rise of social attacks, has narrowed the dividing line between the two.
As SMBs have adjusted their business models, the criminals have
adapted their actions to keep in step and select the quickest and easiest path to their victims.
Contact us to get more information on our security practice and how you can have your team trained on cyber-security awareness.
Can your small business survive during the Covid crisis?/in Computer Technology, Network Infrastructure, Network Security, Work from home /by Carl Easterday
The management stresses that are pressed upon small business owners during this time of crisis are many fold. How do you keep your business afloat during the crisis that diminishes your ability to react, with your staff either working from home, or limited in their ability to interact with each other and customers.
Companies need to rethink their operating model based on how their staff work best, including operations and IT. I know this is old news, but the push to digital tech is accelerating and the skill sets necessary to maintain, plan and grow as well as maintain appropriate security are becoming more and more difficult for small companies that don’t have the resources to employee multiple IT staff and keep their skills up to date.
This provides a new opportunity to review the benefits of a managed IT provider – providing a bench of skilled technology staff as well as a standardized approach to hardware, software management and security for both the endpoints and the overall company.
If you are unfamiliar with the managed IT business model, here is a quick overview: Managed IT services is a subscription based model, usually scoped around the number of devices, with pricing driven by consumption, monitoring, backups and security. This model helps in several ways, but primarily it aligns the cost structure to drive positive proactive maintenance of both infrastructure as well as planning for future growth and expansion to minimize risk. Risk management is something that every business understands. The Managed IT provider assumes and manages much of the risk for the company it serves by applying standardized methodologies to your infrastructure and software systems.
Some questions to ask yourself to determine if your company is ready for a managed IT solution:
- Do you have sufficiently trained staff or time to formally deal with proper maintenance, updates and repairs/replacement?
- Did your IT team achieve its goals last year, or were they hampered by lack of time, skills or support?
- Did your organization have too many outages or downtime?
- Did you lose data due to lack of a proper disaster recovery plan, malware or ransomware?
- Were you able to quickly pivot to a remote workforce and have the tools necessary to maintain and support that workforce?
These are all areas that a managed IT solution provider can help your business cope with the stresses and changes happening in the IT requirements due to Covid.
I recommend you reach out to your local providers and get a better understanding on how managed IT can help your business survive and thrive during these trying times.
Why your company needs to have a network and infrastructure assessment/in Network Infrastructure, Network Security, Uncategorized /by Carl Easterday
Many times, we have been contacted by companies that want us to ‘replace our hyper-visor infrastructure’ or ‘update our server infrastructure’ because of perceived issues in performance or user experience. Unfortunately, by bypassing the critical step of a full network and infrastructure assessment, companies miss out on identifying the root cause of security issues and network performance.
Do you know all your infrastructure assets and what bandwidth they are using?
What are the critical infrastructure is not longer under warranty or service support?
How much traffic is traversing your branch office internet connection?
Network and infrastructure assessments are not a one time and done process. Having fresh insight on your network and potential bottlenecks and security issues brings a piece of mind to any IT Manager, CIO and CSO.
Having our team identify and rank your organization’s pain points gives you the tools to apply budget appropriately and meet the growing demand of your companies IT needs.
Zero-Day vulnerability in iTunes and iCloud Apps on Windows PCs allowed ransomware to be installed/in Network Security /by Carl Easterday
A vulnerability in the Bonjour component in both iTunes and iCloud for Windows was exploited to install malicious applications. Apple has released a patch update for iTunes 12.10.1 and iCloud 7.14, so PC users should check that they have both updates installed.
The worst part of this issue is that no anti-virus will catch it since the actions being done, were being done by a signed Apple application, and therefore flagged as ok. In addition, uninstalling via the iTunes uninstaller doesn’t automatically remove Bonjour, leaving your PC vulnerable even if you have uninstalled the application.
The primary vehicle for the ransomware exploit is called BitPaymer.
This is a good reminder that updating third-party applications is a critical component of a broad based security posture.
Is your business paying attention to cyber-security?/in Network Security /by Carl Easterday
There are many resources available to help your IT team or outsourced partner meet some of the basic policies to protect your business: A network with a firewall, encrypting data, cyber-security insurance and a next generation AI endpoint protection.
But despite these options, over a third of organizations still admit they are unprepared for cyber attacks, according to the eSecurity Planet’s 2019 State of IT Security survey.
Some questions to ask your IT service provider:
- Do we perform penetration testing?
- Do we perform phishing email response testing and education?
- Do we perform threat hunting? (are we already compromised?)
- How often to we review our cyber-security preparedness?
- How quickly could we recover critical data from a backup in case of crypto virus?
But you may be thinking, I’m a small business and not a target for any cyber security issues. Unfortunately, especially with phishing, your data might be a target due to the lack of formal education to help your users make good decisions when they receive a phishing email.
It is also a good idea to have a professional IT consultant review your Microsoft Office 365 tenant for security best practices.
SamSam Ransomware/in Network Security /by Carl Easterday
December 3, the FBI and Department of Homeland Security (DHS) issued an alert for SamSam ransomware—also known as MSIL/SAMAS.A—after identifying certain cyber threat actors using the ransomware to target industries in the US.
SamSam Ransomware: How it Works
As explained in the DHS alert, the SamSam actors exploit Windows servers to gain persistent access to a victim’s network and infect all reachable hosts. According to earlier reports, this is done by:
- The cyber actors using the JexBoss Exploit Kit to access vulnerable JBoss applications
- The cyber actors using Remote Desktop Protocol (RDP) to gain persistent access to victims’ networks
After gaining access to a particular network—typically through brute force attacks or stolen login credentials—the SamSam actors escalate privileges for administrator rights, drop malware onto the server, and run an executable file, all without victims’ action or authorization.
Detecting RDP intrusions can be challenging because the malware enters through an approved access point. While many ransomware campaigns rely on a victim completing an action, such as opening an email or visiting a compromised website, RDP allows cyber actors to infect victims with minimal detection.
Protecting Against SamSam Ransomware
DHS and FBI recommend that users and administrators consider using the following best practices to strengthen the security posture of their organization’s systems and mitigate the risk of SamSam ransomware infection:
- Audit your network for systems that use RDP for remote communication. Disable the service if unneeded or install available patches. Users may need to work with their technology venders to confirm that patches will not affect system processes.
- Verify that all cloud-based virtual machine instances with public IPs have no open RDP ports, especially port 3389, unless there is a valid business reason to keep open RDP ports. Place any system with an open RDP port behind a firewall and require users to use a virtual private network (VPN) to access that system.
- Enable strong passwords and account lockout policies to defend against brute force attacks.
- Where possible, apply two-factor authentication.
- Regularly apply system and software updates.
- Maintain a good backup strategy.
- Enable logging and ensure that logging mechanisms capture RDP logins. Keep logs for a minimum of 90 days and review them regularly to detect intrusion attempts.
- When creating cloud-based virtual machines, adhere to the cloud provider’s best practices for remote access.
- Ensure that third parties that require RDP access follow internal policies on remote access.
- Minimize network exposure for all control system devices. Where possible, disable RDP on critical devices.
- Regulate and limit external-to-internal RDP connections. When external access to internal resources is required, use secure methods such as VPNs. Of course, VPNs are only as secure as the connected devices.
- Restrict users’ ability (permissions) to install and run unwanted software applications.
- Scan for and remove suspicious email attachments; ensure the scanned attachment is its “true file type” (i.e., the extension matches the file header).
- Disable file and printer sharing services. If these services are required, use strong passwords or Active Directory authentication.