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Application security company F5 Networks on Wednesday published an  advisory  warning of four critical vulnerabilities impacting multiple products that could result in a denial of service (DoS) attack and even unauthenticated remote code execution on target networks. The patches concern a total of seven related flaws (from CVE-2021-22986 through CVE-2021-22992),  two  of  which  were discovered and reported by Felix Wilhelm of Google Project Zero in December 2020. The four critical flaws affect BIG-IP versions 11.6 or 12.x and newer, with a critical pre-auth remote code execution (CVE-2021-22986) also affecting BIG-IQ versions 6.x and 7.x. F5 said it's not aware of any public exploitation of these issues. Successful exploitation of these vulnerabilities could lead to a full compromise of vulnerable systems, including the possibility of remote code execution as well as trigger a buffer overflow, leading to a DoS attack. Urging customers to update their BIG-IP and BIG-IQ deploy

Cybersecurity researchers on Wednesday shed light on a new sophisticated backdoor targeting Linux endpoints and servers that's believed to be the work of Chinese nation-state actors. Dubbed " RedXOR " by Intezer, the backdoor masquerades as a polkit daemon, with similarities found between the malware and those previously associated with the  Winnti Umbrella  (or Axiom) threat group such as ​PWNLNX, ​XOR.DDOS​ and Groundhog. RedXOR's name comes from the fact that it encodes its network data with a scheme based on XOR, and that it's compiled with a legacy  GCC compiler  on an old release of Red Hat Enterprise Linux, suggesting that the malware is deployed in targeted attacks against legacy Linux systems. Intezer said  two   samples  of the malware were uploaded from Indonesia and Taiwan around Feb. 23-24, both countries that are known to be singled out by China-based threat groups. Aside from the overlaps in terms of the overall flow and functionalities and th

It comes as no surprise that today's cyber threats are orders of magnitude more complex than those of the past. And the ever-evolving tactics that attackers use demand the adoption of better, more holistic and consolidated ways to meet this non-stop challenge. Security teams constantly look for ways to reduce risk while improving security posture, but many approaches offer piecemeal solutions – zeroing in on one particular element of the evolving threat landscape challenge – missing the forest for the trees.  In the last few years, Exposure Management has become known as a comprehensive way of reigning in the chaos, giving organizations a true fighting chance to reduce risk and improve posture. In this article I'll cover what Exposure Management is, how it stacks up against some alternative approaches and why building an Exposure Management program should be on  your 2024 to-do list. What is Exposure Management?  Exposure Management is the systematic identification, evaluation,

Threat actors known for keeping a low profile do so by ceasing operations for prolonged periods in between to evade attracting any attention as well as constantly refining their toolsets to fly below the radar of many detection technologies. One such group is  FIN8 , a financially motivated threat actor that's back in action after a year-and-a-half hiatus with a powerful version of a backdoor with upgraded capabilities including screen capturing, proxy tunneling, credential theft, and  fileless execution . First documented in 2016 by FireEye, FIN8 is known for its attacks against the retail, hospitality, and entertainment industries while making use of a wide array of techniques such as spear-phishing and malicious tools like  PUNCHTRACK  and  BADHATCH  to steal payment card data from point-of-sale (POS) systems. "The FIN8 group is known for taking long breaks to improve  TTPs  and increase their rate of success," Bitdefender researchers  said  in a report published

Microsoft plugged as many as  89 security flaws  as part of its monthly Patch Tuesday updates released today, including fixes for an actively exploited zero-day in Internet Explorer that could permit an attacker to run arbitrary code on target machines. Of these flaws, 14 are listed as Critical, and 75 are listed as Important in severity, out of which two of the bugs are described as publicly known, while five others have been reported as under active attack at the time of release. Among those five security issues are a clutch of vulnerabilities known as  ProxyLogon  (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065) that allows adversaries to break into Microsoft Exchange Servers in target environments and subsequently allow the installation of unauthorized web-based backdoors to facilitate long-term access. But in the wake of Exchange servers coming under  indiscriminate assault  toward the end of February by multiple threat groups looking to exploit the vulner

Cybersecurity researchers have discovered a new malware dropper contained in as many as 9 Android apps distributed via Google Play Store that deploys a second stage malware capable of gaining intrusive access to the financial accounts of victims as well as full control of their devices. "This dropper, dubbed Clast82, utilizes a series of techniques to avoid detection by Google Play Protect detection, completes the evaluation period successfully, and changes the payload dropped from a non-malicious payload to the AlienBot Banker and MRAT," Check Point researchers Aviran Hazum, Bohdan Melnykov, and Israel Wernik said in a write-up published today. The apps that were used for the campaign include Cake VPN, Pacific VPN, eVPN, BeatPlayer, QR/Barcode Scanner MAX, Music Player, tooltipnatorlibrary, and QRecorder. After the findings were reported to Google on January 28, the rogue apps were removed from the Play Store on February 9.  Malware authors have resorted to a variety o

The SolarWinds Sunburst attack has been in the headlines since it was first discovered in December 2020.  As the so-called layers of the onion are peeled back, additional information regarding how the vulnerability was exploited, who was behind the attack, who is to blame for the attack, and the long-term ramifications of this type of supply chain vulnerabilities continue to be actively discussed.  Cybersecurity company Cynet is taking a needed step back to provide a full picture of the SolarWinds attack from start to finish in an upcoming webinar, " Lessons Learned from the SolarWinds SUNBURST Attack ." Information regarding many aspects of the attack has been coming out in pieces, but we haven't yet seen this type of comprehensive overview of the technical steps behind the full attack, as well as clear recommendations for protecting against similar future attacks. And this is precisely what's needed so security professionals can gain insights on the attack tact

A malicious web shell deployed on Windows systems by leveraging a previously undisclosed zero-day in SolarWinds' Orion network monitoring software may have been the work of a possible Chinese threat group. In a  report  published by Secureworks on Monday, the cybersecurity firm attributed the intrusions to a threat actor it calls Spiral. Back on December 22, 2020, Microsoft  disclosed  that a second espionage group may have been abusing the IT infrastructure provider's Orion software to drop a persistent backdoor called Supernova on target systems. The findings were also corroborated by cybersecurity firms Palo Alto Networks'  Unit 42  threat intelligence team and  GuidePoint Security , both of whom described Supernova as a .NET web shell implemented by modifying an "app_web_logoimagehandler.ashx.b6031896.dll" module of the SolarWinds Orion application. The alterations were made possible not by breaching the SolarWinds app update infrastructure but instead b

The European Banking Authority (EBA) on Sunday said it had been a victim of a cyberattack targeting its Microsoft Exchange Servers, forcing it to temporarily take its email systems offline as a precautionary measure. "As the vulnerability is related to the EBA's email servers, access to personal data through emails held on that servers may have been obtained by the attacker," the Paris-based regulatory agency  said . EBA said it's launched a full investigation into the incident in partnership with its information and communication technology (ICT) provider, a team of forensic experts, and other relevant entities. In a second update issued on Monday, the agency said it had secured its email infrastructure and that it found no evidence of data extraction, adding it has "no indication to think that the breach has gone beyond our email servers." Besides deploying extra security measures, EBA also noted it's closely monitoring the situation after restor

Apple has released out-of-band patches for iOS, macOS, watchOS, and Safari web browser to address a security flaw that could allow attackers to run arbitrary code on devices via malicious web content. Tracked as CVE-2021-1844 , the vulnerability was discovered and reported to the company by Clément Lecigne of Google's Threat Analysis Group and Alison Huffman of Microsoft Browser Vulnerability Research. According to the update notes posted by Apple, the flaw stems from a memory corruption issue that could lead to arbitrary code execution when processing specially crafted web content. The company said the problem was addressed with "improved validation." The update is available for devices running  iOS 14.4, iPadOS 14.4 ,  macOS Big Sur , and  watchOS 7.3.1  (Apple Watch Series 3 and later), and as an  update to Safari  for MacBooks running macOS Catalina and macOS Mojave. The latest development comes on the heels of a patch for  three zero-day vulnerabilities  (CVE-