TA505: A Brief History Of Their Time

Threat Intel Analyst: Antonis Terefos (@Tera0017)Data Scientist: Anne Postma (@A_Postma) 1. Introduction TA505 is a sophisticated and innovative threat actor, with plenty of cybercrime experience, that engages in targeted attacks across multiple sectors and geographies for financial gain. Over time, TA505 evolved from a lesser partner to a mature, self-subsisting and versatile crime operation with … Continue reading TA505: A Brief History Of Their Time

Decrypting OpenSSH sessions for fun and profit

Author: Jelle Vergeer Introduction A while ago we had a forensics case in which a Linux server was compromised and a modified OpenSSH binary was loaded into the memory of a webserver. The modified OpenSSH binary was used as a backdoor to the system for the attackers. The customer had pcaps and a hypervisor snapshot … Continue reading Decrypting OpenSSH sessions for fun and profit

Conference Talks – October 2020

This month, members of NCC Group will be presenting their work at the following conferences: Dirk-Jan Mollema, "Walking Your Dog in Multiple Forests: Breaking AD Trust Boundaries through Kerberos Vulnerabilities," to be presented at Black Hat Asia 2020 (Virtual - October 1 2020)Sanne Maasakkers, "Improve Security Awareness Campaigns by Applying Phishing Research," to be presented … Continue reading Conference Talks – October 2020

Machine learning from idea to reality: a PowerShell case study

Detecting both ‘offensive’ and obfuscated PowerShell scripts in Splunk using Windows Event Log 4104 This blog provides a ‘look behind the scenes’ at the RIFT Data Science team and describes the process of moving from the need or an idea for research towards models that can be used in practice. More specifically, how known and … Continue reading Machine learning from idea to reality: a PowerShell case study

WastedLocker: A New Ransomware Variant Developed By The Evil Corp Group

Authors: Nikolaos Pantazopoulos, Stefano Antenucci (@Antelox), Michael Sandee and in close collaboration with NCC’s RIFT. About the Research and Intelligence Fusion Team (RIFT):RIFT leverages our strategic analysis, data science, and threat hunting capabilities to create actionable threat intelligence, ranging from IOCs and detection capabilities to strategic reports on tomorrow's threat landscape. Cyber security is an … Continue reading WastedLocker: A New Ransomware Variant Developed By The Evil Corp Group

In-depth analysis of the new Team9 malware family

Publicly discovered in late April 2020, the Team9 malware family (also known as ‘Bazar’) appears to be a new malware being developed by the group behind Trickbot. Even though the development of the malware appears to be recent, the developers have already developed two components with rich functionality. The purpose of this blog post is to describe the functionality of the two components, the loader and the backdoor.