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Category Archives for "Security"

Networking Challenges in OpenStack Clouds

Did you decided that is time to implement OpenStack to build your Cloud? Have you tested in the lab? Evaluated many distributions available and hired specialized OpenStack resources? However, when the environment goes into production, Neutron is not integrating with the physical network?

If the above story closely resembles what you have faced, this post will unconceal the many challenges of Networking with any OpenStack distribution and how VMware NSX is the missing piece for your Cloud.

Networking and Security Challenges with OpenStack

Since its creation, the biggest challenges of OpenStack Clouds implementations are automation, integration and orchestration of the required networking and security components at the physical infrastructure layer. The main difficulty is that these environments are extremely heterogeneous and most of the devices do not have an open and programmable interface for configuration and, thus, the initial way of running OpenStack was to pre-provisioning the network manually and only use basics functionalities when implementing security services.

With the rise of Network Virtualization solutions and evolution of Open vSwitch, some of these challenges were solved, making it possible to create an abstraction layer from the physical elements of infrastructure and automate the virtual network through the programmable interface Continue reading

Three Issues of Being a Part-Time Security Professional

In Information Technology, we commonly hear the mantra of “doing more with less.” That may sound great, and in some cases it can actually be beneficial. It obviously drives the requirement of streamlining performance and the simplification of processes. It can drive innovators to innovate and the attrition of unnecessary systems. The predominate reason for this philosophy is cost cutting.

My argument would generally be that IT should NOT simply be keeping the lights on, it should be adding value by creating competitive differentiators for the business. Being able to execute on that effectively SHOULD change the perspective of IT as it is viewed by the rest of the leadership team. One particular concern I have in regards to those businesses that continue aggressively down this path of cost cutting (or don’t proper initially fund) IT, is in regards to Cybersecurity.

In many cases smaller shops, or shops that don’t fully understand the risks, tend to place their technical team members into split roles. Maybe the view is that someone should be a part-time security person and a part-time network or system administrator. This introduces several concerns and I wanted to quickly share three that are top of mind.

Issue One — What do I Continue reading

Burner laptops for DEF CON

Hacker summer camp (Defcon, Blackhat, BSidesLV) is upon us, so I thought I'd write up some quick notes about bringing a "burner" laptop. Chrome is your best choice in terms of security, but I need Windows/Linux tools, so I got a Windows laptop.

I chose the Asus e200ha for $199 from Amazon with free (and fast) shipping. There are similar notebooks with roughly the same hardware and price from other manufacturers (HP, Dell, etc.), so I'm not sure how this compares against those other ones. However, it fits my needs as a "burner" laptop, namely:
  • cheap
  • lasts 10 hours easily on battery
  • weighs 2.2 pounds (1 kilogram)
  • 11.6 inch and thin
Some other specs are:
  • 4 gigs of RAM
  • 32 gigs of eMMC flash memory
  • quad core 1.44 GHz Intel Atom CPU
  • Windows 10
  • free Microsoft Office 365 for one year
  • good, large keyboard
  • good, large touchpad
  • USB 3.0
  • microSD
  • WiFi ac
  • no fans, completely silent
There are compromises, of course.
  • The Atom CPU is slow, thought it's only noticeable when churning through heavy webpages. Adblocking addons or Brave are a necessity. Most things are usably fast, such as using Microsoft Word.
  • Crappy sound and Continue reading

Packet Tracer in Firepower Threat Defense

I wanted to share a quick post on a feature that I have found incredibly useful on the ASA and has been extended to Firepower Threat Defense. The feature is called Packet Tracer and is an easy way to apply “packet walk” logic to a flow that would be initiated through the platform. Like most things FTD, the Firepower Management Console is the point of contact for initiating the process.

To initiate Packet Tracer in FTD, open the Firepower Management Console and choose ‘Devices‘ then ‘Device Management‘. Next, select the device that you want to perform the operation and select the icon that looks like a screwdriver and wrench.

DevDevMgmt

This will produce the screen that provides health monitoring and troubleshooting for the device. Selecting “Advanced Troubleshooting” will change the view to a multi-tab troubleshooting screen.

AdvTroubleshoot

Selecting the Packet Tracer tab will allow for input like Source/Destination, Protocol, Port, SGT, etc.

PacketTracer

After filling out this information and choosing “Start“, the device would be put through the same process as an initial packet of a new connection. The resulting packet walk is shown in an expandable tree view or raw text (user selectable).

Tree View

TreeView

Continue reading

Yet more reasons to disagree with experts on nPetya

In WW II, they looked at planes returning from bombing missions that were shot full of holes. Their natural conclusion was to add more armor to the sections that were damaged, to protect them in the future. But wait, said the statisticians. The original damage is likely spread evenly across the plane. Damage on returning planes indicates where they could damage and still return. The undamaged areas are where they were hit and couldn't return. Thus, it's the undamaged areas you need to protect.

This is called survivorship bias.

Many experts are making the same mistake with regards to the nPetya ransomware. 

I hate to point this out, because they are all experts I admire and respect, especially @MalwareJake, but it's still an error. An example is this tweet:


The context of this tweet is the discussion of why nPetya was well written with regards to spreading, but full of bugs with regards to collecting on the ransom. The conclusion therefore that it wasn't intended to be ransomware, but was intended Continue reading

Latest Ransomware Techniques Show Need for Layered Security

I think everyone that touches security has had multiple conversations about the hardened edge and soft center, commonly found in networks. This usually accompanies some discussion around the overlapping concepts of difference in depth, layered security and security ecosystems. It seems like many of the recent exploits have used a C2 connection for instructions. In those cases, assuming a perfect NGFW product and configuration actually existed that caught 100% of the malicious traffic, it would have the capability to impact those attacks.

However on June 27, Cisco Talos published an article about a ransomware variant known as Nyetya. As of today, Talos has been able to find no evidence of the more common initial infection vehicles. Both Cisco and Microsoft have cited the upgrade process for a tax accounting package as the initial point of infection.

Per Cisco Talos:

The identification of the initial vector is still under investigation. We have observed no use of email or Office documents as a delivery mechanism for this malware. We believe that infections are associated with software update systems for a Ukrainian tax accounting package called MeDoc. Talos is investigating this currently.

So what does this mean to the majority of the world that Continue reading

NonPetya: no evidence it was a “smokescreen”

Many well-regarded experts claim that the not-Petya ransomware wasn't "ransomware" at all, but a "wiper" whose goal was to destroy files, without any intent at letting victims recover their files. I want to point out that there is no real evidence of this.


Certainly, things look suspicious. For one thing, it certainly targeted the Ukraine. For another thing, it made several mistakes that prevent them from ever decrypting drives. Their email account was shutdown, and it corrupts the boot sector.

But these things aren't evidence, they are problems. They are things needing explanation, not things that support our preferred conspiracy theory.

The simplest, Occam's Razor explanation explanation is that they were simple mistakes. Such mistakes are common among ransomware. We think of virus writers as professional software developers who thoroughly test their code. Decades of evidence show the opposite, that such software is of poor quality with shockingly bad bugs.

It's true that effectively, nPetya is a wiper. Matthieu Suiche‏ does a great job describing one flaw that prevents it working. @hasherezade does a great job explaining another flaw.  But best explanation isn't that this is intentional. Even if these bugs didn't exist, it'd still be a wiper if the Continue reading

VMware Evolve Transform Security is Coming to A City Near You!

Modern IT professionals face significant security challenges. As digital transformation continues to connect applications, users, and data in the cloud, perimeter security models that once offered businesses protection are no longer sufficient. Critical visibility into users and endpoints is missing, enforcing policies is difficult, and, in the meantime, cyberattacks are more sophisticated and costly than ever.

What do IT teams need to defend today’s applications, users, and data from potentially brand-damaging attacks?

That’s the question VMware experts will be tackling during our VMware EVOLVE Transform Security events, coming to a city near you. During these half-day, in-person events, you will learn how a ubiquitous software layer can help support the security challenges of the modern business. 

VMware experts will guide you through how to:

  • Secure application infrastructure and better align security controls to apps
  • Secure identity and endpoints to control access and enforce data loss prevention
  • Streamline governance, risk management and compliance to limit cyber-attack vectors

Reserve your spot at an upcoming Transform Security-focused VMware EVOLVE event in your city:

The post VMware Evolve Transform Security is Coming to A City Near You! appeared first on Network Virtualization.

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