Segurança Informática - Tópicos atuais sobre segurança da informação. A segurança informática é da responsabilidade de todos.

computer security, Malware, segurancainformatica

Ransomware deletion methods and the canary in the coal mine

17 Setembro, 2021

Introduction Ransomware is an emergent threat. Every week, there is a new and notable outbreak of this class of data encryption malware. From Ragnar Locker to Netwalker, the threats…

Malware, Malware and Phishing Analysis, reverse engineering, segurancainformatica

The new maxtrilha trojan is being disseminated and targeting several banks

10 Setembro, 2021

A new banking trojan dubbed maxtrilha (due to its encryption key) has been discovered in the last few days and targeting customers of European and…

Hacking, segurancainformatica, tutorials

Bypassing security products via DNS data exfiltration

7 Setembro, 2021

Criminals are using different strategies to compromise computer networks, infrastructures, and organizations. Cyber incidents have increased in number and complexity since the exploitation of public…

Malware, Malware and Phishing Analysis, ransomware, reverse engineering, segurancainformatica

Netwalker ransomware full analysis

3 Setembro, 2021

Netwalker is a data encryption malware that represents an evolution of the well-known Kokoklock ransomware and has been active since September 2019. This article will detail the specific technical features of the Netwalker ransomware. We will analyze what Netwalker is, how it works, and how you can avoid falling victim to this threat.

Malware and Phishing Analysis, Phishing, segurancainformatica

Phishing+Telegram: Solicitação de reembolso da Autoridade Tributária?

31 Agosto, 2021

Phishing+Telegram: Solicitação de reembolso da Autoridade Tributária?

Malware and Phishing Analysis, Phishing, segurancainformatica

Fraude personificando a marca Continente espalha-se através do WhatsApp: Não se deixe enganar!

27 Agosto, 2021

Nos últimos dias, uma nova campanha fraudulenta personificando a marca Continente tem atingido os utilizadores portugueses. A campanha tem a capacidade de se auto-propagar via WhatsApp.

computer security, Data Breach, ransomware, Reports, segurancainformatica

NIST ransomware recovery guide: What you need to know

26 Agosto, 2021

NIST ransomware recovery guide: What you need to know.

computer security, segurancainformatica

How to protect files with canary tokens

24 Agosto, 2021

This article provides some hints and tricks on keeping data away from hackers. However, we will not describe an approach to stop the exploitation of vulnerabilities and the leak of information. Instead, a method based on canary tokens can be used by developers and IT professionals to receive alerts when something strange happens in their infrastructures and applications.

Malware, Malware and Phishing Analysis, reverse engineering, segurancainformatica

Ragnar Locker – Malware analysis

19 Agosto, 2021

Ragnar Locker is ransomware that affects devices running Microsoft Windows operating systems. It was initially observed towards the end of December 2019 as part of a series of attacks against compromised networks.

Malware, Malware and Phishing Analysis, reverse engineering, segurancainformatica

Secrets behind the Lazarus’s VHD ransomware

17 Agosto, 2021

Data encryption malware is one of the most popular malware families in recent years and targets mass volumes of users and companies around the world. In this article, we will take a deep dive into a new VHD ransomware distributed in the wild by the Lazarus group — the criminals behind the WannaCry incident in 2017.

Malware, Malware and Phishing Analysis, reverse engineering, segurancainformatica