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Category — Windows
Microsoft’s Patch Tuesday Fixes 63 Flaws, Including Two Under Active Exploitation

Microsoft's Patch Tuesday Fixes 63 Flaws, Including Two Under Active Exploitation

Feb 12, 2025 Patch Tuesday / Vulnerability
Microsoft on Tuesday released fixes for 63 security flaws impacting its software products, including two vulnerabilities that it said has come under active exploitation in the wild. Of the 63 vulnerabilities, three are rated Critical, 57 are rated Important, one is rated Moderate, and two are rated Low in severity. This is aside from the 23 flaws Microsoft addressed in its Chromium-based Edge browser since the release of last month's Patch Tuesday update . The update is notable for fixing two actively exploited flaws - CVE-2025-21391 (CVSS score: 7.1) - Windows Storage Elevation of Privilege Vulnerability  CVE-2025-21418 (CVSS score: 7.8) - Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability "An attacker would only be able to delete targeted files on a system," Microsoft said in an alert for CVE-2025-21391. "This vulnerability does not allow disclosure of any confidential information, but could allow an attacker to delete d...
Experts Find Shared Codebase Linking Morpheus and HellCat Ransomware Payloads

Experts Find Shared Codebase Linking Morpheus and HellCat Ransomware Payloads

Jan 23, 2025 Threat Intelligence / Data Breach
An analysis of HellCat and Morpheus ransomware operations has revealed that affiliates associated with the respective cybercrime entities are using identical code for their ransomware payloads. The findings come from SentinelOne, which analyzed artifacts uploaded to the VirusTotal malware scanning platform by the same submitter towards the end of December 2024. "These two payload samples are identical except for victim specific data and the attacker contact details," security researcher Jim Walter said in a new report shared with The Hacker News. Both HellCat and Morpheus are nascent entrants to the ransomware ecosystem, having emerged in October and December 2024, respectively. A deeper examination of the Morpheus/HellCat payload, a 64-bit portable executable, has revealed that both samples require a path to be specified as an input argument. They are both configured to exclude the \Windows\System32 folder, as well as a hard-coded list of extensions from the encryp...
Don't Overlook These 6 Critical Okta Security Configurations

Don't Overlook These 6 Critical Okta Security Configurations

Feb 10, 2025Identity Security / Data Protection
Given Okta's role as a critical part of identity infrastructure, strengthening Okta security is essential. This article covers six key Okta security settings that provide a strong starting point, along with recommendations for implementing continuous monitoring of your Okta security posture. With over 18,000 customers, Okta serves as the cornerstone of identity governance and security for organizations worldwide. However, this prominence has made it a prime target for cybercriminals who seek access to valuable corporate identities, applications, and sensitive data. Recently, Okta warned its customers of an increase in phishing social engineering attempts to impersonate Okta support personnel. Given Okta's role as a critical part of identity infrastructure, strengthening Okta security is essential. This article covers six key Okta security settings that provide a strong starting point, along with how continuous monitoring of your Okta security posture helps you avoid miscon...
The Mask APT Resurfaces with Sophisticated Multi-Platform Malware Arsenal

The Mask APT Resurfaces with Sophisticated Multi-Platform Malware Arsenal

Dec 17, 2024 Cyber Espionage / Mobile Security
A little-known cyber espionage actor known as The Mask has been linked to a new set of attacks targeting an unnamed organization in Latin America twice in 2019 and 2022. "The Mask APT is a legendary threat actor that has been performing highly sophisticated attacks since at least 2007," Kaspersky researchers Georgy Kucherin and Marc Rivero said in an analysis published last week. "Their targets are usually high-profile organizations, such as governments, diplomatic entities, and research institutions." Also known as Careto, the threat actor was previously documented by the Russian cybersecurity company over a decade ago in February 2014 as having targeted over 380 unique victims since 2007. The origins of the hacking group are currently unknown. Initial access to target networks is facilitated by means of spear-phishing emails embedding links to malicious websites that are designed to trigger browser-based zero-day exploits to infect the visitor (e.g., CVE-...
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Webinar: 5 Ways New AI Agents Can Automate Identity Attacks | Register Now

websitePush SecurityAI Agents / Identity Security
Learn how CUAs like OpenAI Operator can be used by attackers to automate account takeover and exploitation.
New Malware Technique Could Exploit Windows UI Framework to Evade EDR Tools

New Malware Technique Could Exploit Windows UI Framework to Evade EDR Tools

Dec 11, 2024 Malware / Endpoint Security
A newly devised technique leverages a Windows accessibility framework called UI Automation (UIA) to perform a wide range of malicious activities without tipping off endpoint detection and response (EDR) solutions. "To exploit this technique, a user must be convinced to run a program that uses UI Automation," Akamai security researcher Tomer Peled said in a report shared with The Hacker News. "This can lead to stealthy command execution, which can harvest sensitive data, redirect browsers to phishing websites, and more." Even worse, local attackers could take advantage of this security blindspot to execute commands and read/write messages from/to messaging applications like Slack and WhatsApp. On top of that, it could also be potentially weaponized to manipulate UI elements over a network. First available in Windows XP as part of the Microsoft .NET Framework, UI Automation is designed to provide programmatic access to various user interface (UI) elements and h...
Microsoft Fixes 72 Flaws, Including Patch for Actively Exploited CLFS Vulnerability

Microsoft Fixes 72 Flaws, Including Patch for Actively Exploited CLFS Vulnerability

Dec 11, 2024 Vulnerability / Patch Tuesday
Microsoft closed out its Patch Tuesday updates for 2024 with fixes for a total of 72 security flaws spanning its software portfolio, including one that it said has been exploited in the wild. Of the 72 flaws, 17 are rated Critical, 54 are rated Important, and one is rated Moderate in severity. Thirty-one of the vulnerabilities are remote code execution flaws, and 27 of them allow for the elevation of privileges. This is in addition to 13 vulnerabilities the company has addressed in its Chromium-based Edge browser since the release of last month's security update . In total, Microsoft has resolved as many as 1,088 vulnerabilities in 2024 alone, per Fortra. The vulnerability that Microsoft has acknowledged as having been actively exploited is CVE-2024-49138 (CVSS score: 7.8), a privilege escalation flaw in the Windows Common Log File System (CLFS) Driver. "An attacker who successfully exploited this vulnerability could gain SYSTEM privileges," the company said in an...
Hackers Using Fake Video Conferencing Apps to Steal Web3 Professionals' Data

Hackers Using Fake Video Conferencing Apps to Steal Web3 Professionals' Data

Dec 07, 2024 Malware / Web3 Security
Cybersecurity researchers have warned of a new scam campaign that leverages fake video conferencing apps to deliver an information stealer called Realst targeting people working in Web3 under the guise of fake business meetings. "The threat actors behind the malware have set up fake companies using AI to make them increase legitimacy," Cado Security researcher Tara Gould said . "The company reaches out to targets to set up a video call, prompting the user to download the meeting application from the website, which is Realst infostealer." The activity has been codenamed Meeten by the security company, owing to the use of names such as Clusee, Cuesee, Meeten, Meetone, and Meetio for the bogus sites. The attacks entail approaching prospective targets on Telegram to discuss a potential investment opportunity, urging them to join a video call hosted on one of the dubious platforms. Users who end up on the site are prompted to download a Windows or macOS version dep...
NachoVPN Tool Exploits Flaws in Popular VPN Clients for System Compromise

NachoVPN Tool Exploits Flaws in Popular VPN Clients for System Compromise

Dec 03, 2024 Endpoint Security / Vulnerability
Cybersecurity researchers have disclosed a set of flaws impacting Palo Alto Networks and SonicWall virtual private network (VPN) clients that could be potentially exploited to gain remote code execution on Windows and macOS systems. "By targeting the implicit trust VPN clients place in servers, attackers can manipulate client behaviours, execute arbitrary commands, and gain high levels of access with minimal effort," AmberWolf said in an analysis. In a hypothetical attack scenario, this plays out in the form of a rogue VPN server that can trick the clients into downloading malicious updates that can cause unintended consequences. The result of the investigation is a proof-of-concept (PoC) attack tool called NachoVPN that can simulate such VPN servers and exploit the vulnerabilities to achieve privileged code execution. The identified flaws are listed below - CVE-2024-5921 (CVSS score: 5.6) - An insufficient certificate validation vulnerability impacting Palo Alto N...
Russian Hackers Exploit New NTLM Flaw to Deploy RAT Malware via Phishing Emails

Russian Hackers Exploit New NTLM Flaw to Deploy RAT Malware via Phishing Emails

Nov 14, 2024 Malware / Vulnerability
A newly patched security flaw impacting Windows NT LAN Manager (NTLM) was exploited as a zero-day by a suspected Russia-linked actor as part of cyber attacks targeting Ukraine. The vulnerability in question, CVE-2024-43451 (CVSS score: 6.5), refers to an NTLM hash disclosure spoofing vulnerability that could be exploited to steal a user's NTLMv2 hash. It was patched by Microsoft earlier this week. "Minimal interaction with a malicious file by a user such as selecting (single-click), inspecting (right-click), or performing an action other than opening or executing could trigger this vulnerability," Microsoft revealed in its advisory. Israeli cybersecurity company ClearSky, which discovered the zero-day exploitation of the flaw in June 2024, said it's been abused as part of an attack chain that delivers the open-source Spark RAT malware. "The vulnerability activates URL files, leading to malicious activity," the company said, adding the malicious file...
Microsoft Fixes 90 New Flaws, Including Actively Exploited NTLM and Task Scheduler Bugs

Microsoft Fixes 90 New Flaws, Including Actively Exploited NTLM and Task Scheduler Bugs

Nov 13, 2024 Vulnerability / Patch Tuesday
Microsoft on Tuesday revealed that two security flaws impacting Windows NT LAN Manager ( NTLM ) and Task Scheduler have come under active exploitation in the wild. The security vulnerabilities are among the 90 security bugs the tech giant addressed as part of its Patch Tuesday update for November 2024. Of the 90 flaws, four are rated Critical, 85 are rated Important, and one is rated Moderate in severity. Fifty-two of the patched vulnerabilities are remote code execution flaws. The fixes are in addition to 31 vulnerabilities Microsoft resolved in its Chromium-based Edge browser since the release of the October 2024 Patch Tuesday update. The two vulnerabilities that have been listed as actively exploited are below - CVE-2024-43451 (CVSS score: 6.5) - Windows NTLM Hash Disclosure Spoofing Vulnerability CVE-2024-49039 (CVSS score: 8.8) - Windows Task Scheduler Elevation of Privilege Vulnerability "This vulnerability discloses a user's NTLMv2 hash to the attacker who c...
New Rust-Based Ransomware Cicada3301 Targets Windows and Linux Systems

New Rust-Based Ransomware Cicada3301 Targets Windows and Linux Systems

Sep 03, 2024 Endpoint Security / Malware
Cybersecurity researchers have unpacked the inner workings of a new ransomware variant called Cicada3301 that shares similarities with the now-defunct BlackCat (aka ALPHV) operation. "It appears that Cicada3301 ransomware primarily targets small to medium-sized businesses (SMBs), likely through opportunistic attacks that exploit vulnerabilities as the initial access vector," cybersecurity company Morphisec said in a technical report shared with The Hacker News. Written in Rust and capable of targeting both Windows and Linux/ESXi hosts, Cicada3301 first emerged in June 2024, inviting potential affiliates to join their ransomware-as-a-service (RaaS) platform via an advertisement on the RAMP underground forum. A notable aspect of the ransomware is that the executable embeds the compromised user's credentials, which are then used to run PsExec , a legitimate tool that makes it possible to run programs remotely. Cicada3301's similarities with BlackCat also extend t...
Chinese Hackers Exploit VMware Zero-Day to Backdoor Windows and Linux Systems

Chinese Hackers Exploit VMware Zero-Day to Backdoor Windows and Linux Systems

Jun 14, 2023 Zero-Day / Network Security
The Chinese state-sponsored group known as  UNC3886  has been found to exploit a zero-day flaw in VMware ESXi hosts to backdoor Windows and Linux systems. The VMware Tools authentication bypass vulnerability, tracked as  CVE-2023-20867  (CVSS score: 3.9), "enabled the execution of privileged commands across Windows, Linux, and PhotonOS (vCenter) guest VMs without authentication of guest credentials from a compromised ESXi host and no default logging on guest VMs," Mandiant  said . UNC3886 was  initially documented  by the Google-owned threat intelligence firm in September 2022 as a cyber espionage actor infecting VMware ESXi and vCenter servers with backdoors named VIRTUALPITA and VIRTUALPIE. Earlier this March, the group was  linked  to the exploitation of a now-patched medium-severity security flaw in the Fortinet FortiOS operating system to deploy implants on the network appliances and interact with the aforementioned malware. The th...
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