In their first article on the XZ backdoor, Kaspersky researchers analyzed its code from initial infection to the function hooking it performs. As they mentioned then, its initial goal was to successfully hook one of the functions related to RSA key manipulation.
In this article, the research team will focus on the backdoor’s behaviour inside OpenSSH, specifically OpenSSH portable version 9.7p1 – the most recent version at this time. To better understand what’s going on, they recommend you to read Baeldung’s article about SSH authentication methods and JFrog’s article about privilege separation in SSH.
Read more…
Source: Kaspersky
Related:
- Accellion FTA Zero-Day Attacks Show Ties to Clop Ransomware, FIN11
February 22, 2021
Researchers have identified a set of threat actors (dubbed UNC2546 and UNC2582) with connections to the FIN11 and the Clop ransomware gang as the cybercriminal group behind the global zero-day attacks on users of the Accellion legacy File Transfer Appliance product. Multiple Accellion FTA customers, including the Jones Day Law Firm, Kroger and Singtel, have all ...
- The State Of Ransomware, 2020’s Catch-22
February 3, 2021
A ransomware infection can put organizations in difficult situations. The damage that WannaCry and Petya have caused has made people more wary, leading to stricter and more consistent security measures against a constant threat. Developments in ransomware over the past year have made dealing with ransomware not only difficult but also a delicate matter. Aside ...
- Finding and Decoding Multi-Step Obfuscated Malware
February 2, 2021
Recently, in the process of a threat investigation, Trend Micro researchers found an interesting event. A process (nslookup.exe) that tried to connect to a malicious URL that was already blocked by trend Micro solutions. We could have stopped at this point, but searching for the root cause is part of managed detection and response (MDR) — ...
- Raindrop Backdoor: New Malware Discovered in SolarWinds Investigation
January 20, 2021
Symantec, a division of Broadcom, has uncovered an additional piece of malware used in the SolarWinds attacks which was used against a select number of victims that were of interest to the attackers. Raindrop (Backdoor.Raindrop) is a loader which delivers a payload of Cobalt Strike. Raindrop is very similar to the already documented Teardrop tool, but ...
- XDR investigation uncovers PlugX, unique technique in APT attack
January 20, 2021
Advanced persistent threats (APT) are known — and are universally dreaded — for their stealth. Actors behind such attacks actively innovate their techniques to evade detection and ensure that they maintain a foothold inside an environment as long as possible. Through the Apex One with Endpoint Sensor (iES), we discovered one such incident wherein an ...
- VPNFilter Two Years Later: Routers Still Compromised
January 19, 2021
With the internet of things (IoT) gaining more popularity, common IoT devices such as routers, printers, cameras, and network-attached storage (NAS) devices, are becoming more frequent targets for cybercriminals. Unlike typical operating systems such as Windows and macOS, users are less likely to patch IoT devices. This is because users find the task more difficult and ...