Hunting down Threat Infrastructure (1)

In this two article series, I am going to explain how to spot anomalous activity in proxies and DNS queries coming out of your network. Additionally, I am also explaining how to recognize suspicious threat infrastructure, what elements you need to pay attention to, how this infrastructure behaves, what are the challenges for the defender and…

The evil side of DNS

Detection on this phase of the kill chain is not extremely complex, however from a business perspective it is critical for the organization to find this activity. An attacker who has progressed his attack to the C&C phase may be a dangerous and impactful threat for the business. Whether your organization is part of botnet…

Threat hunting quick fix

Are you currently threat hunting and not finding much? I do not support this threat hunting modality however it is true that I use it when I do not have the time to go on a hunting trip and keep focused. This is not a silver bullet but it is true that it can help…

Cyber Threat Hunting (3): Hunting in the perimeter

In this third post we are going to see what we need to look at when hunting and detecting adversaries in the perimeter. We are also going to look at some of the firewall technologies and their log formats in order to detect anomalies in the inbound and outbound traffic in your network.    …

Cyber Threat Hunting (2): Getting Ready

In my previous post I went through the basics of hunting and its benefits for the organization and for analysts. To continue the journey, today I am going to cover the preparations you need to do before you go out there and hunt. We are covering preparations and locations to hunt. As you need some…

Cyber Threat Hunting (1): Intro

After some long months debating whether to write a white paper, and what potential topics I could write about – I just decided that I do not have enough time to go through the process of writing a research paper for the next 6 to 12 months. Instead, I am taking some of my research and current…

Bypassing Perimeter Security and Malware Evasion (3)

This will be the final post in which I am presenting one of the many infection and evasion techniques used by criminals today. In this article which I hope is shorter than the previous ones, https://samuelalonsog.wordpress.com/2015/08/14/bypassing-perimeter-security-and-malware-evasion-1/ and https://samuelalonsog.wordpress.com/2015/08/24/bypassing-perimeter-security-and-malware-evasion-2/ I presume you are currently competent with pcap analysis and Wireshark as the main aim of this…

Bypassing Perimeter Security and Malware Evasion (2)

This post is a continuation of Bypassing Perimeter Security and Malware Evasion (1) As discussed before the best way to understand how drived by downloads technique work to bypass modern cyberdefenses is with a network traffic analysis exercise. The get a full understanding of the technique we will have to look for answers to some…

Computer network defense operations, disrupting the enemy’s attack

In the last couple of weeks I have been reading different white papers related to network computer defense and the general idea in all of them is that the industry is moving towards a dynamic approach to computer network defense. In the past, IT would be dealing with the defense of corporate networks however that…

Bypassing Perimeter Security and Malware Evasion (1)

I could have titled this article in many ways such as perimeter disintegration, endpoint security visibility still a problem or even exploit kit. The reality is that all of them are part of a bigger problem and it is how criminals are bypassing the security perimeter and getting inside the networks where organization´s most precious…