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In its April slate of patches, Microsoft rolled out fixes for a total of  114 security flaws , including an actively exploited zero-day and four remote code execution bugs in Exchange Server. Of the  114 flaws , 19 are rated as Critical, 88 are rated Important, and one is rated Moderate in severity. Chief among them is  CVE-2021-28310 , a privilege escalation vulnerability in Win32k that's said to be under active exploitation, allowing attackers to elevate privileges by running malicious code on a target system.  Cybersecurity firm Kaspersky, which discovered and reported the flaw to Microsoft in February, linked the zero-day exploit to a threat actor named Bitter APT, which was found exploiting a similar flaw ( CVE-2021-1732 ) in attacks late last year. "It is an escalation of privilege (EoP) exploit that is likely used together with other browser exploits to escape sandboxes or get system privileges for further access," Kaspersky researcher Boris Larin  said . NS

Security researchers have uncovered nine vulnerabilities affecting four TCP/IP stacks impacting more than 100 million consumer and enterprise devices that could be exploited by an attacker to take control of a vulnerable system. Dubbed " NAME:WRECK " by Forescout and JSOF, the flaws are the latest in series of studies undertaken as part of an initiative called Project Memoria to study the security of widely-used TCP/IP stacks that are incorporated by various vendors in their firmware to offer internet and network connectivity features. "These vulnerabilities relate to Domain Name System (DNS) implementations, causing either Denial of Service (DoS) or Remote Code Execution (RCE), allowing attackers to take target devices offline or to take control over them," the researchers said. The name comes from the fact that parsing of domain names can break (i.e., "wreck") DNS implementations in TCP/IP stacks, adding to a recent uptick in vulnerabilities such as 

Follow this real-life network attack simulation, covering 6 steps from Initial Access to Data Exfiltration. See how attackers remain undetected with the simplest tools and why you need multiple choke points in your defense strategy. Surprisingly, most network attacks are not exceptionally sophisticated, technologically advanced, or reliant on zero-day tools that exploit edge-case vulnerabilities. Instead, they often use commonly available tools and exploit multiple vulnerability points. By simulating a real-world network attack, security teams can test their detection systems, ensure they have multiple choke points in place, and demonstrate the value of networking security to leadership. In this article, we demonstrate a real-life attack that could easily occur in many systems. The attack simulation was developed based on the MITRE ATT&CK framework, Atomic Red Team,  Cato Networks ' experience in the field, and public threat intel. In the end, we explain why a holistic secur

Microsoft has warned organizations of a "unique" attack campaign that abuses contact forms published on websites to deliver malicious links to businesses via emails containing fake legal threats, in what's yet another instance of adversaries abusing legitimate infrastructure to mount evasive campaigns that bypass security protections. "The emails instruct recipients to click a link to review supposed evidence behind their allegations, but are instead led to the download of IcedID, an info-stealing malware," the company's threat intelligence team  said  in a write-up published last Friday. IceID  is a Windows-based banking trojan that's used for reconnaissance and exfiltration of banking credentials, alongside features that allow it to connect to a remote command-and-control (C2) server to deploy additional payloads such as ransomware and malware capable of performing hands-on-keyboard attacks, stealing credentials, and moving laterally across affecte

The SolarWinds attack , which succeeded by utilizing the sunburst malware , shocked the cyber-security industry. This attack achieved persistence and was able to evade internal systems long enough to gain access to the source code of the victim. Because of the far-reaching SolarWinds deployments, the perpetrators were also able to infiltrate many other organizations, looking for intellectual property and other assets. Among the co-victims: US government, government contractors, Information Technology companies, and NGOs. An incredible amount of sensitive data was stolen from several customers after a trojanized version of SolarWinds' application was installed on their internal structures. Looking at the technical capabilities of the malware, as you will see, this particular attack was quite impressive. A particular file, named  SolarWinds.Orion.Core.BusinessLayer.dll  is a SolarWinds digitally signed component of the Orion software framework. The threat actors installed a back

A new set of malicious Android apps have been caught posing as app security scanners on the official Play Store to distribute a backdoor capable of gathering sensitive information. "These malicious apps urge users to update Chrome, WhatsApp, or a PDF reader, yet instead of updating the app in question, they take full control of the device by abusing accessibility services," cybersecurity firm McAfee  said  in an analysis published on Monday. The apps in question were designed to target users in Brazil, Spain, and the U.S., with most of them accruing anywhere between 1,000 to 5,000 installs. Another app named DefenseScreen racked up 10,000 installs before it was removed from the Play Store last year. First documented by Kaspersky in August 2019,  BRATA  (short for "Brazilian Remote Access Tool Android") emerged as an Android malware with screen recording abilities before steadily morphing into a banking trojan. "It combines full device control capabilitie

An Indian security researcher has publicly published a proof-of-concept (PoC) exploit code for a newly discovered flaw impacting Google Chrome and other Chromium-based browsers like Microsoft Edge, Opera, and Brave. Released by Rajvardhan Agarwal, the working  exploit  concerns a remote code execution vulnerability in the V8 JavaScript rendering engine that powers the web browsers. It is believed to be the same flaw demonstrated by Dataflow Security's Bruno Keith and Niklas Baumstark at  Pwn2Own 2021 hacking contest  last week. Keith and Baumstark were awarded $100,000 for leveraging the vulnerability to run malicious code inside Chrome and Edge. According to the screenshot shared by Agarwal, the PoC HTML file, and its associated JavaScript file, can be loaded in a Chromium-based browser to exploit the security flaw and launch the Windows calculator (calc.exe) app. But it's worth noting that the exploit needs to be chained with another flaw that can allow it to escape Chro

Online trading and discount brokerage platform Upstox has become the latest Indian company to suffer a security breach of its systems, resulting in the exposure of sensitive information of approximately 2.5 million users on the dark web. The leaked information includes names, email addresses, dates of birth, bank account information, and about 56 million know your customer (KYC) documents pulled from the company's server. The breach was first disclosed by independent researcher  Rajshekhar Rajaharia  on April 11. It's not immediately clear when the incident occurred. Reacting to the development, the company however said it had recently upgraded its security systems following reports of "unauthorized access into our database" while stressing that users' funds and securities remained protected. As a precaution, besides initiating a secure password reset of users' accounts, Upstox said it restricted access to the impacted database, implying it was a case

Behind the strategies and solutions needed to counter today's cyber threats are—dedicated cybersecurity researchers. They spend their lives dissecting code and analyzing incident reports to discover how to stop the bad guys.  But what drives these specialists? To understand the motivations for why these cybersecurity pros do what they do, we decided to talk with cybersecurity analysts from around the world. To get viewpoints from across Europe, Asia, and the Americas, we recently spoke with a team of researchers from Acronis' global network of Cyber Protection Operations Centers (CPOCs):  Candid Wüest , VP of Cyber Protection Research who is based in Switzerland;  Alexander Ivanyuk , Senior Director, Product, and Technology Positioning, who is based in Singapore; and two Cybersecurity Analysts,  Topher Tebow  and  Blake Collins , who are both based in the U.S. The conversation yielded some interesting insights into their views of the world, how they approach cyber threat an

The 2021 spring edition of  Pwn2Own  hacking contest concluded last week on April 8 with a three-way tie between Team Devcore, OV, and Computest researchers Daan Keuper and Thijs Alkemade. A total of $1.2 million was awarded for 16 high-profile exploits over the course of the three-day virtual event organized by the Zero Day Initiative (ZDI). Targets with successful attempts included Zoom, Apple Safari, Microsoft Exchange, Microsoft Teams, Parallels Desktop, Windows 10, and Ubuntu Desktop operating systems. Some of the major highlights are as follows — Using an authentication bypass and a local privilege escalation to completely take over a Microsoft Exchange server, for which the Devcore team netted $200,000 Chaining a pair of bugs to achieve code execution in Microsoft Teams, earning researcher OV $200,000 A zero-click exploit targeting Zoom that employed a three-bug chain to exploit the messenger app and gain code execution on the target system. ($200,000) The exploitation