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The Hacker News - Most Trusted Cyber Security and Computer Security Analysis: Virtual Machine

Cloud-based Cryptocurrency Miners Targeting GitHub Actions and Azure VMs

Cloud-based Cryptocurrency Miners Targeting GitHub Actions and Azure VMs

July 11, 2022Ravie Lakshmanan
GitHub Actions and Azure virtual machines (VMs) are being leveraged for cloud-based cryptocurrency mining, indicating sustained attempts on the part of malicious actors to target cloud resources for illicit purposes. "Attackers can abuse the  runners  or servers provided by GitHub to run an organization's pipelines and automation by maliciously downloading and installing their own cryptocurrency miners to gain profit easily," Trend Micro researcher Magno Logan  said  in a report last week. GitHub Actions ( GHAs ) is a continuous integration and continuous delivery (CI/CD) platform that allows users to automate the software build, test, and deployment pipeline. Developers can leverage the feature to create workflows that build and test every pull request to a code repository, or deploy merged pull requests to production. Both Linux and Windows runners are hosted on  Standard_DS2_v2  virtual machines on Azure and come with two vCPUs and 7GB of memory. The Japanese com
Cisco Issues Patches for 3 New Flaws Affecting Enterprise NFVIS Software

Cisco Issues Patches for 3 New Flaws Affecting Enterprise NFVIS Software

May 05, 2022Ravie Lakshmanan
Cisco Systems on Wednesday shipped security patches to contain three flaws impacting its Enterprise NFV Infrastructure Software ( NFVIS ) that could permit an attacker to fully compromise and take control over the hosts. Tracked as CVE-2022-20777, CVE-2022-20779, and CVE-2022-20780, the vulnerabilities "could allow an attacker to escape from the guest virtual machine (VM) to the host machine, inject commands that execute at the root level, or leak system data from the host to the VM," the company  said . Credited for discovering and reporting the issues are Cyrille Chatras, Pierre Denouel, and Loïc Restoux of Orange Group. Updates have been released in version 4.7.1. The networking equipment company said the flaws affect Cisco Enterprise NFVIS in the default configuration. Details of the three bugs are as follows - CVE-2022-20777  (CVSS score: 9.9) - An issue with insufficient guest restrictions that allows an authenticated, remote attacker to escape from the guest VM
Experts Detail Virtual Machine Used by Wslink Malware Loader for Obfuscation

Experts Detail Virtual Machine Used by Wslink Malware Loader for Obfuscation

March 29, 2022Ravie Lakshmanan
Cybersecurity researchers have shed more light on a malicious loader that runs as a server and executes received modules in memory, laying bare the structure of an "advanced multi-layered virtual machine" used by the malware to fly under the radar. Wslink, as the malicious loader is called, was first  documented  by Slovak cybersecurity company ESET in October 2021, with very few telemetry hits detected in the past two years spanning Central Europe, North America, and the Middle East. Analysis of the malware samples have yielded little to no clues about the initial compromise vector used, and no code, functionality, or operational similarities have been uncovered to suggest that this is a tool from a previously identified threat actor. Packed with a file compression utility named NsPack, Wslink makes use of what's called a  process virtual machine  (VM), a mechanism to run an application in a platform-independent manner that abstracts the underlying hardware or opera
Unpatched Virtual Machine Takeover Bug Affects Google Compute Engine

Unpatched Virtual Machine Takeover Bug Affects Google Compute Engine

June 29, 2021Ravie Lakshmanan
An unpatched security vulnerability affecting Google's Compute Engine platform could be abused by an attacker to take over virtual machines over the network. "This is done by impersonating the metadata server from the targeted virtual machine's point of view," security researcher Imre Rad said in an  analysis  published Friday. "By mounting this exploit, the attacker can grant access to themselves over SSH (public key authentication) so then they can login as the root user." Google Compute Engine ( GCE ) is an infrastructure-as-a-service (IaaS) component of Google Cloud Platform that enables users to create and launch virtual machines (VMs) on demand. GCE provides a method for storing and retrieving metadata in the form of the  metadata server , which offers a central point to set metadata in the form of key-value pairs that's then provided to virtual machines at runtime. According to the researcher, the issue is a consequence of weak pseudo-random
Reverse RDP Attack Also Enables Guest-to-Host Escape in Microsoft Hyper-V

Reverse RDP Attack Also Enables Guest-to-Host Escape in Microsoft Hyper-V

August 08, 2019Mohit Kumar
Remember the Reverse RDP Attack ? Earlier this year, researchers disclosed clipboard hijacking and path-traversal issues in Microsoft's Windows built-in RDP client that could allow a malicious RDP server to compromise a client computer, reversely. (You can find details and a video demonstration for this security vulnerability, along with dozens of critical flaws in other third-party RDP clients, in a previous article written by Swati Khandelwal for The Hacker News.) At the time when researchers responsibly reported this path-traversal issue to Microsoft, in October 2018, the company acknowledged the issue, also known as " Poisoned RDP vulnerability ," but decided not to address it. Now, it turns out that Microsoft silently patched this vulnerability  (CVE-2019-0887) just last month as part of its July Patch Tuesday updates after Eyal Itkin, security researcher at CheckPoint, found the same issue affecting Microsoft's Hyper-V technology as well. Microsoft
This Cryptomining Malware Launches Linux VMs On Windows and macOS

This Cryptomining Malware Launches Linux VMs On Windows and macOS

June 21, 2019Mohit Kumar
Cybersecurity researchers from at least two firms today unveiled details of a new strain of malware that targets Windows and macOS systems with a Linux-based cryptocurrency mining malware. It may sound strange, but it's true. Dubbed " LoudMiner " and also " Bird Miner, " the attack leverages command-line based virtualization software on targeted systems to silently boot an image of Tiny Core Linux OS that already contains a hacker-activated cryptocurrency mining software in it. Isn't it interesting to use emulation to run single-platform malware on cross-platforms? Spotted by researchers at ESET and Malwarebytes , attackers are distributing this malware bundled with pirated and cracked copies of VST (Virtual Studio Technology) software on the Internet and via Torrent network since August 2018. VST applications contain sounds, effects, synthesizers, and other advanced editing features that allow tech-centric audio professionals to create music.
Unpatched VirtualBox Zero-Day Vulnerability and Exploit Released Online

Unpatched VirtualBox Zero-Day Vulnerability and Exploit Released Online

November 08, 2018Mohit Kumar
An independent exploit developer and vulnerability researcher has publicly disclosed a zero-day vulnerability in VirtualBox —a popular open source virtualization software developed by Oracle—that could allow a malicious program to escape virtual machine (guest OS) and execute code on the operating system of the host machine. The vulnerability occurs due to memory corruption issues and affects Intel PRO / 1000 MT Desktop (82540EM) network card (E1000) when the network mode is set to NAT (Network Address Translation). The flaw is independent of the type of operating system being used by the virtual and host machines because it resides in a shared code base. VirtualBox Zero-Day Exploit and Demo Video Released Sergey Zelenyuk published Wednesday a detailed technical explanation of the zero-day flaw on GitHub, which affects all current versions (5.2.20 and prior) of VirtualBox software and is present on the default Virtual Machine (VM) configuration. According to Zelenyuk, t
Foreshadow Attacks — 3 New Intel CPU Side-Channel Flaws Discovered

Foreshadow Attacks — 3 New Intel CPU Side-Channel Flaws Discovered

August 15, 2018Swati Khandelwal
2018 has been quite a tough year for Intel. While the chip-maker giant is still dealing with Meltdown and Spectre processor vulnerabilities, yet another major speculative execution flaw has been revealed in Intel's Core and Xeon lines of processors that may leave users vulnerable to cyber-attacks. Dubbed Foreshadow , alternatively called L1 Terminal Fault or L1TF, the new attacks include three new speculative execution side-channel vulnerabilities affecting Intel processors. The Foreshadow attacks could allow a hacker or malicious application to gain access to the sensitive data stored in a computer's memory or third-party clouds, including files, encryption keys, pictures, or passwords. The three Foreshadow vulnerabilities have been categorized into two variants: 1.) Foreshadow Foreshadow ( PDF ) targets a new technology originally been designed to protect select code and users' data from disclosure or modification, even if the entire system falls under a
Microsoft creates its own FreeBSD VM Image for Azure Cloud Computing Platform

Microsoft creates its own FreeBSD VM Image for Azure Cloud Computing Platform

June 09, 2016Mohit Kumar
This year, Microsoft impressed the world with 'Microsoft loves Linux' announcements, like developing a custom Linux-based OS for running Azure Cloud Switch, selecting Ubuntu as the operating system for its Cloud-based Big Data services and bringing the popular Bash shell to Windows 10 . Now, the next big news for open-source community: Microsoft has released its own custom distribution of FreeBSD 10.3 as a "ready-made" Virtual Machine image in order to make the operating system available directly from the Azure Marketplace. FreeBSD (Berkeley Software Distribution) is an open source Unix-like advanced computer operating system used to power modern servers, desktops as well as embedded systems. Until now, the only way for Azure customers to run FreeBSD was to make use of a custom image from outside of Azure (from the FreeBSD Foundation). However, the new release makes it easier for Azure users to launch FreeBSD directly from the Azure Marketplace and get
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