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:
- Noodle RAT: Reviewing the Backdoor Used by Chinese-Speaking Groups
June 11, 2024
Since 2022, Trend Micro researchers have been investigating numerous targeted attacks in the Asia-Pacific region that used the same ELF backdoor. Most vendors identify this backdoor as a variant of existing malware such as Gh0st RAT or Rekoobe. However, Trend Micro unearthed the truth: this backdoor is not merely a variant of existing malware, but is ...
- New Agent Tesla Campaign Targeting Spanish-Speaking People
June 7, 2024
A new phishing campaign was recently captured by our FortiGuard Labs that spreads a new Agent Tesla variant targeting Spanish-speaking people. Security researchers have detected Agent Tesla campaigns from time to time for years. Agent Tesla is a well-known .Net-based Remote Access Trojan (RAT) designed to stealthily infiltrate victim’s computers and steal their sensitive information, such ...
- Sapphire Werewolf polishes Amethyst stealer to attack over 300 companies
June 5, 2024
Since March 2024, the BI.ZONE Threat Intelligence team has been tracking the cluster of activity dubbed Sapphire Werewolf. The threat actor targets Russia’s industries, such as education, manufacturing, IT, defense, and aerospace engineering. Over 300 attacks were carried out using Amethyst, an offshoot of the popular open‑source SapphireStealer. The attackers disguise the malware as an enforcement ...
- Excel File Deploys Cobalt Strike at Ukraine
June 3, 2024
FortiGuard Labs has recently identified a sophisticated cyberattack involving an Excel file embedded with a VBA macro designed to deploy a DLL file. The attacker uses a multi-stage malware strategy to deliver the notorious “Cobalt Strike” payload and establish communication with a command and control (C2) server. This attack employs various evasion techniques to ensure successful ...
- Inside The Box: Malware’s New Playground
June 3, 2024
Over the past few months, we have been monitoring the increasing abuse of BoxedApp products in the wild. BoxedApp products are commercial packers that provide advanced features such as Virtual Storage (Virtual File System, Virtual Registry), Virtual Processes, and a universal instrumentation system (WIN/NT API hooking). Even though BoxedApp has been commercially available for a while, ...
- Static Unpacking For The Widespread NSIS-Based Malicious Packer Family
May 28, 2024
Packers or crypters are widely used to protect malicious software from detection and static analysis. These auxiliary tools, through the use of compression and encryption algorithms, enable cybercriminals to prepare unique samples of malicious software for each campaign or even per victim, which complicates the work of antivirus software. In the case of certain packers, classifying ...