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Networking equipment maker Zyxel has released patches for a critical security flaw in its firewall devices that could be exploited to achieve remote code execution on affected systems. The issue, tracked as  CVE-2023-28771 , is rated 9.8 on the CVSS scoring system. Researchers from TRAPA Security have been credited with reporting the flaw. "Improper error message handling in some firewall versions could allow an unauthenticated attacker to execute some OS commands remotely by sending crafted packets to an affected device," Zyxel  said  in an advisory on April 25, 2023. Products impacted by the flaw are - ATP (versions ZLD V4.60 to V5.35, patched in ZLD V5.36) USG FLEX (versions ZLD V4.60 to V5.35, patched in ZLD V5.36) VPN (versions ZLD V4.60 to V5.35, patched in ZLD V5.36), and ZyWALL/USG (versions ZLD V4.60 to V4.73, patched in ZLD V4.73 Patch 1) Zyxel has also  addressed  a high-severity post-authentication command injection vulnerability affecting...

A significant number of victims in the consumer and enterprise sectors located across Australia, Japan, the U.S., and India have been affected by an evasive information-stealing malware called  ViperSoftX . ViperSoftX was first documented by Fortinet in 2020, with cybersecurity company Avast detailing a campaign in November 2022 that  leveraged  the malware to distribute a malicious Google Chrome extension capable of siphoning cryptocurrencies from wallet applications. Now a  new analysis  from Trend Micro has revealed the malware's adoption of "more sophisticated encryption and basic anti-analysis techniques, such as byte remapping and web browser communication blocking." The arrival vector of ViperSoftX is typically a software crack or a key generator (keygen), while also employing actual non-malicious software like multimedia editors and system cleaner apps as "carriers." One of the key steps performed by the malware before downloading a first-stage Po...

An ongoing  Magecart  campaign has attracted the attention of cybersecurity researchers for leveraging realistic-looking fake payment screens to capture sensitive data entered by unsuspecting users. "The threat actor used original logos from the compromised store and customized a web element known as a modal to perfectly hijack the checkout page," Jérôme Segura, director of threat intelligence at Malwarebytes,  said . "The remarkable thing here is that the skimmer looks more authentic than the original payment page." The term  Magecart  is a catch-all that refers to several cybercrime groups which employ online skimming techniques to steal personal data from websites – most commonly, customer details and payment information on e-commerce websites. The name originates from the groups' initial targeting of the Magento platform. According to  data  shared by Sansec, the first Magecart-like attacks were observed as early as 2010. As of 2022, more than ...

South Korean education, construction, diplomatic, and political institutions are at the receiving end of new attacks perpetrated by a China-aligned threat actor known as the  Tonto Team . "Recent cases have revealed that the group is using a file related to anti-malware products to ultimately execute their malicious attacks," the AhnLab Security Emergency Response Center (ASEC)  said  in a report published this week. Tonto Team, active since at least 2009, has a track record of targeting various sectors across Asia and Eastern Europe. Earlier this year, the group was  attributed  to an unsuccessful phishing attack on cybersecurity company Group-IB. The attack sequence discovered by ASEC starts with a Microsoft Compiled HTML Help (.CHM) file that executes a binary file to side-load a malicious DLL file (slc.dll) and launch  ReVBShell , an open source VBScript backdoor also put to use by another Chinese threat actor called  Tick . ReVBShell is subs...

Google on Wednesday said it obtained a temporary court order in the U.S. to disrupt the distribution of a Windows-based information-stealing malware called  CryptBot  and "decelerate" its growth. The tech giant's Mike Trinh and Pierre-Marc Bureau  said  the efforts are part of steps it takes to "not only hold criminal operators of malware accountable, but also those who profit from its distribution." CryptBot is estimated to have infected over 670,000 computers in 2022 with the goal of stealing sensitive data such as authentication credentials, social media account logins, and cryptocurrency wallets from users of Google Chrome. The harvested data is then exfiltrated to the threat actors, who then sell the data to other attackers for use in data breach campaigns. CryptBot was  first discovered  in the wild in December 2019. The malware has been traditionally delivered via maliciously modified versions of legitimate and popular software packages such as...

A little-known Russian-speaking cyber-espionage group has been linked to a new politically-motivated surveillance campaign targeting high-ranking government officials, telecom services, and public service infrastructures in Tajikistan. The intrusion set, dubbed  Paperbug  by Swiss cybersecurity company PRODAFT, has been attributed to a threat actor known as  Nomadic Octopus  (aka DustSquad). "The types of compromised machines range from individuals' computers to [operational technology] devices," PRODAFT said in a deep dive technical report shared with The Hacker News. "These targets make operation 'Paperbug' intelligence-driven." The ultimate motive behind the attacks is unclear at this stage, but the cybersecurity firm has raised the possibility that it could be the work of opposition forces within the country or, alternatively, an intelligence-gathering mission carried out by Russia or China. Nomadic Octopus first came to light in October 2018 w...

Remote Access Trojans (RATs) have taken the third leading position in ANY. RUN's  Q1 2023 report  on the most prevalent malware types, making it highly probable that your organization may face this threat. Though LimeRAT might not be the most well-known RAT family, its versatility is what sets it apart. Capable of carrying out a broad spectrum of malicious activities, it excels not only in data exfiltration, but also in creating DDoS botnets and facilitating crypto mining. Its compact footprint allows it to elude endpoint detection systems, making it a stealthy adversary. Interestingly, LimeRAT shares similarities with njRAT, which ANY.RUN ranks as the third most popular malware family in terms of uploads during Q1 2023. ANY.RUN researchers have recently conducted an in-depth analysis of a LimeRAT sample and successfully extracted its configuration. In this article, we'll provide a brief overview of that analysis. Collected artifacts SHA1 14836dd608efb4a0c552a4f370...

The threat actors behind  RTM Locker  have developed a ransomware strain that's capable of targeting Linux machines, marking the group's first foray into the open source operating system. "Its locker ransomware infects Linux, NAS, and ESXi hosts and appears to be inspired by  Babuk  ransomware's leaked source code," Uptycs said in a new report published Wednesday. "It uses a combination of  ECDH  on Curve25519 (asymmetric encryption) and  Chacha20  (symmetric encryption) to encrypt files." RTM Locker was  first documented  by Trellix earlier this month, describing its developers as a private ransomware-as-a-service (RaaS) provider. It has its roots in a cybercrime group called Read The Manual (RTM) that's known to be active since at least 2015. The group is notable for deliberately avoiding high-profile targets such as critical infrastructure, law enforcement, and hospitals so as to draw as little attention as possible. It also lev...

Microsoft has confirmed that the  active exploitation of PaperCut servers  is linked to attacks that are designed to deliver Cl0p and LockBit ransomware families. The tech giant's threat intelligence team is attributing a subset of the intrusions to a financially motivated actor it tracks under the name  Lace Tempest  (formerly DEV-0950), which overlaps with other hacking groups like FIN11, TA505, and Evil Corp. "In observed attacks, Lace Tempest ran multiple PowerShell commands to deliver a TrueBot DLL, which connected to a C2 server, attempted to steal LSASS credentials, and injected the  TrueBot payload  into the conhost.exe service," Microsoft  said  in a series of tweets. The next phase of the attack entailed the deployment of Cobalt Strike Beacon implant to conduct reconnaissance, move laterally across the network using WMI, and exfiltrate files of interest via the file-sharing service MegaSync. Lace Tempest is a Cl0p ransomware affilia...

The Chinese nation-state group dubbed  Alloy Taurus  is using a Linux variant of a backdoor called PingPull as well as a new undocumented tool codenamed Sword2033. That's according to findings from Palo Alto Networks Unit 42, which  discovered  recent malicious cyber activity carried out by the group targeting South Africa and Nepal. Alloy Taurus is the constellation-themed moniker assigned to a threat actor that's known for its attacks targeting telecom companies since at least 2012. It's also tracked by Microsoft as Granite Typhoon (previously Gallium). Last month, the adversary was attributed to a campaign called  Tainted Love  targeting telecommunication providers in the Middle East as part of a broader operation referred to as Soft Cell. Recent cyber espionage attacks mounted by Alloy Taurus have also broadened their victimology footprint to include financial institutions and government entities. PingPull,  first documented  by Unit 42...

The prolific Iranian nation-state group known as  Charming Kitten  is actively targeting multiple victims in the U.S., Europe, the Middle East and India with a novel malware dubbed  BellaCiao , adding to its ever-expanding list of custom tools. Discovered by Bitdefender Labs, BellaCiao is a "personalized dropper" that's capable of delivering other malware payloads onto a victim machine based on commands received from an actor-controlled server. "Each sample collected was tied up to a specific victim and included hard-coded information such as company name, specially crafted subdomains, or associated public IP address," the Romanian cybersecurity firm  said  in a report shared with The Hacker News. Charming Kitten, also known as APT35, Cobalt Illusion, Educated Manticore, ITG18, Mint Sandstorm (née Phosphorus), TA453, and Yellow Garuda, is an Iranian state-sponsored APT group associated with the Islamic Revolutionary Guard Corps ( IRGC ). Over the years, the...

The advanced persistent threat (APT) group referred to as  Evasive Panda  has been observed targeting an international non-governmental organization (NGO) in Mainland China with malware delivered via update channels of legitimate applications like Tencent QQ. The attack chains are designed to distribute a Windows installer for MgBot malware, ESET security researcher Facundo Muñoz said in a new report published today. The activity commenced in November 2020 and continued throughout 2021. Evasive Panda, also known as Bronze Highland and Daggerfly, is a Chinese-speaking APT group that has been attributed to a series of  cyber espionage attacks  targeting various entities in China, Hong Kong, and other countries located in East and South Asia since at least late December 2012. The group's hallmark is the use of the custom MgBot modular malware framework, which is capable of receiving additional components on the fly to expand on its intelligence-gathering capabiliti...

The browser serves as the primary interface between the on-premises environment, the cloud, and the web in the modern enterprise. Therefore, the browser is also exposed to multiple types of cyber threats and operational risks.  In light of this significant challenge, how are CISOs responding? LayerX, Browser Security platform provider, has polled more than 150 CISOs across multiple verticals and geolocations. They asked them about their security practices for SaaS access, BYOD, phishing, browser data loss and browser security. The results of this extensive poll can be found in the report "2023 Browser Security Survey". In this article, we bring a taste of the report. You can read all the results and analysis here . Main Highlights Organizations in the cloud are exposed to web-borne attacks. 87% of all-SaaS adopters and 79% of CISOs in a hybrid environment experienced a web-borne security threat in the past 12 months. Account takeover is a top concern. 48% list credential ...