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The Russia-linked threat actor known as Gamaredon (aka Shuckworm) has been attributed to a cyber attack targeting a foreign military mission based in Ukraine with an aim to deliver an updated version of a known malware called GammaSteel. The group targeted the military mission of a Western country, per the Symantec Threat Hunter team, with first signs of the malicious activity detected on February 26, 2025. "The initial infection vector used by the attackers appears to have been an infected removable drive," the Broadcom-owned threat intelligence division said in a report shared with The Hacker News. The attack started with the creation of a Windows Registry value under the UserAssist key, followed by launching "mshta.exe" using "explorer.exe" to initiate a multi-stage infection chain and launch two files. The first file, named "NTUSER.DAT.TMContainer00000000000000000001.regtrans-ms," is used to establish communications with a command-and...

Threat actors have been observed distributing malicious payloads such as cryptocurrency miner and clipper malware via SourceForge , a popular software hosting service, under the guise of cracked versions of legitimate applications like Microsoft Office. "One such project, officepackage, on the main website sourceforge.net, appears harmless enough, containing Microsoft Office add-ins copied from a legitimate GitHub project," Kaspersky said in a report published today. "The description and contents of officepackage provided below were also taken from GitHub." While every project created on sourceforge.net gets assigned a "<project>.sourceforge.io" domain name, the Russian cybersecurity company found that the domain for officepackage, "officepackage.sourceforge[.]io," displays a long list of Microsoft Office applications and corresponding links to download them in Russian. On top of that, hovering over the download button reveals a seemi...

The threat actors behind the zero-day exploitation of a recently-patched security vulnerability in Microsoft Windows have been found to deliver two new backdoors called SilentPrism and DarkWisp . The activity has been attributed to a suspected Russian hacking group called Water Gamayun , which is also known as EncryptHub and LARVA-208. "The threat actor deploys payloads primarily by means of malicious provisioning packages, signed .msi files, and Windows MSC files, using techniques like the IntelliJ runnerw.exe for command execution," Trend Micro researchers Aliakbar Zahravi and Ahmed Mohamed Ibrahim said in a follow-up analysis published last week. Water Gamayun has been linked to the active exploitation of CVE-2025-26633 (aka MSC EvilTwin), a vulnerability in the Microsoft Management Console (MMC) framework, to execute malware by means of a rogue Microsoft Console (.msc) file. The attack chains involve the use of provisioning packages (.ppkg), signed Microsoft Windows...

Entities in Ukraine have been targeted as part of a phishing campaign designed to distribute a remote access trojan called Remcos RAT . "The file names use Russian words related to the movement of troops in Ukraine as a lure," Cisco Talos researcher Guilherme Venere said in a report published last week. "The PowerShell downloader contacts geo-fenced servers located in Russia and Germany to download the second stage ZIP file containing the Remcos backdoor." The activity has been attributed with moderate confidence to a Russian hacking group known as Gamaredon , which is also tracked under the monikers Aqua Blizzard, Armageddon, Blue Otso, BlueAlpha, Hive0051, Iron Tilden, Primitive Bear, Shuckworm, Trident Ursa, UAC-0010, UNC530, and Winterflounder.  The threat actor, assessed to be affiliated with Russia's Federal Security Service (FSB), is known for its targeting of Ukrainian organizations for espionage and data theft. It's operational since at least ...

The threat actor known as EncryptHub exploited a recently-patched security vulnerability in Microsoft Windows as a zero-day to deliver a wide range of malware families, including backdoors and information stealers such as Rhadamanthys and StealC. "In this attack, the threat actor manipulates .msc files and the Multilingual User Interface Path (MUIPath) to download and execute malicious payload, maintain persistence and steal sensitive data from infected systems," Trend Micro researcher Aliakbar Zahravi said in an analysis. The vulnerability in question is CVE-2025-26633 (CVSS score: 7.0), described by Microsoft as an improper neutralization vulnerability in Microsoft Management Console ( MMC ) that could allow an attacker to bypass a security feature locally. It was fixed by the company earlier this month as part of its Patch Tuesday update. Trend Micro has given the exploit the moniker MSC EvilTwin, tracking the suspected Russian activity cluster under the name Water...

Cybersecurity researchers have uncovered two malicious extensions in the Visual Studio Code (VSCode) Marketplace that are designed to deploy ransomware that's under development to its users. The extensions, named "ahban.shiba" and "ahban.cychelloworld," have since been taken down by the marketplace maintainers. Both the extensions, per ReversingLabs , incorporate code that's designed to invoke a PowerShell command, which then grabs a PowerShell-script payload from a command-and-control (C2) server and executes it. The payload is suspected to be ransomware in early-stage development, only encrypting files in a folder called "testShiba" on the victim's Windows desktop. Once the files are encrypted, the PowerShell payload displays a message, stating "Your files have been encrypted. Pay 1 ShibaCoin to ShibaWallet to recover them." However, no other instructions or cryptocurrency wallet addresses are provided to the victims, anothe...

YouTube videos promoting game cheats are being used to deliver a previously undocumented stealer malware called Arcane likely targeting Russian-speaking users. "What's intriguing about this malware is how much it collects," Kaspersky said in an analysis. "It grabs account information from VPN and gaming clients, and all kinds of network utilities like ngrok, Playit, Cyberduck, FileZilla, and DynDNS." The attack chains involve sharing links to a password-protected archive on YouTube videos, which, when opened, unpacks a start.bat batch file that's responsible for retrieving another archive file via PowerShell. The batch file then utilizes PowerShell to launch two executables embedded within the newly downloaded archive, while also disabling Windows SmartScreen protections and every drive root folder to SmartScreen filter exceptions. Of the two binaries, one is a cryptocurrency miner and the other is a stealer dubbed VGS that's a variant of the Phe...

A new malware campaign has been observed leveraging social engineering tactics to deliver an open-source rootkit called r77 . The activity, condemned OBSCURE#BAT by Securonix, enables threat actors to establish persistence and evade detection on compromised systems. It's currently not known who is behind the campaign. The rootkit "has the ability to cloak or mask any file, registry key or task beginning with a specific prefix," security researchers Den Iuzvyk and Tim Peck said in a report shared with The Hacker News. "It has been targeting users by either masquerading as legitimate software downloads or via fake captcha social engineering scams." The campaign is designed to mainly target English-speaking individuals, particularly the United States, Canada, Germany, and the United Kingdom. OBSCURE#BAT gets its name from the fact that the starting point of the attack is an obfuscated Windows batch script that, in turn, executes PowerShell commands to activ...

Threat hunters have shed light on a "sophisticated and evolving malware toolkit" called Ragnar Loader that's used by various cybercrime and ransomware groups like Ragnar Locker (aka Monstrous Mantis), FIN7, FIN8, and Ruthless Mantis (ex-REvil). "Ragnar Loader plays a key role in keeping access to compromised systems, helping attackers stay in networks for long-term operations," Swiss cybersecurity company PRODAFT said in a statement shared with The Hacker News. "While it's linked to the Ragnar Locker group, it's unclear if they own it or just rent it out to others. What we do know is that its developers are constantly adding new features, making it more modular and harder to detect." Ragnar Loader, also referred to as Sardonic, was first documented by Bitdefender in August 2021 in connection with an unsuccessful attack carried out by FIN8 aimed at an unnamed financial institution located in the U.S. It's said to have been put to use ...

Microsoft has disclosed details of a large-scale malvertising campaign that's estimated to have impacted over one million devices globally as part of what it said is an opportunistic attack designed to steal sensitive information. The tech giant, which detected the activity in early December 2024, is tracking it under the broader umbrella Storm-0408, a moniker used for a set of threat actors that are known to distribute remote access or information-stealing malware via phishing, search engine optimization (SEO), or malvertising. "The attack originated from illegal streaming websites embedded with malvertising redirectors, leading to an intermediary website where the user was then redirected to GitHub and two other platforms," the Microsoft Threat Intelligence team said . "The campaign impacted a wide range of organizations and industries, including both consumer and enterprise devices, highlighting the indiscriminate nature of the attack." The most signifi...

Internet service providers (ISPs) in China and the West Coast of the United States have become the target of a mass exploitation campaign that deploys information stealers and cryptocurrency miners on compromised hosts. The findings come from the Splunk Threat Research Team, which said the activity also led to the delivery of various binaries that facilitate data exfiltration as well as offer ways to establish persistence on the systems. The unidentified threat actors performed "minimal intrusive operations to avoid detection, with the exception of artifacts created by accounts already compromised," the Cisco-owned company said in a technical report published last week. "This actor also moves and pivots primarily by using tools that depend and run on scripting languages (e.g., Python and Powershell), allowing the actor to perform under restricted environments and use API calls (e.g., Telegram) for C2 [command-and-control] operations." The attacks have been ob...

Cybersecurity researchers have shed light on a new Golang-based backdoor that uses Telegram as a mechanism for command-and-control (C2) communications. Netskope Threat Labs, which detailed the functions of the malware, described it as possibly of Russian origin. "The malware is compiled in Golang and once executed it acts like a backdoor," security researcher Leandro Fróes said in an analysis published last week. "Although the malware seems to still be under development it is completely functional." Once launched, the backdoor is designed to check if it's running under a specific location and using a specific name – "C:\Windows\Temp\svchost.exe" – and if not, it reads its own contents, writes them to that location, and creates a new process to launch the copied version and terminate itself. A notable aspect of the malware is that it uses an open-source library that offers Golang bindings for the Telegram Bot API for C2 purposes. This involves...

A nation-state threat actor with ties to North Korea has been linked to an ongoing campaign targeting South Korean business, government, and cryptocurrency sectors. The attack campaign, dubbed DEEP#DRIVE by Securonix, has been attributed to a hacking group known as Kimsuky , which is also tracked under the names APT43, Black Banshee, Emerald Sleet, Sparkling Pisces, Springtail, TA427, and Velvet Chollima. "Leveraging tailored phishing lures written in Korean and disguised as legitimate documents, the attackers successfully infiltrated targeted environments," security researchers Den Iuzvyk and Tim Peck said in a report shared with The Hacker News, describing the activity as a "sophisticated and multi-stage operation." The decoy documents, sent via phishing emails as .HWP, .XLSX, and .PPTX files, are disguised as work logs, insurance documents and crypto-related files to trick recipients into opening them, thereby triggering the infection process. The attack...

Threat actors have observed the increasingly common ClickFix technique to deliver a remote access trojan named NetSupport RAT since early January 2025. NetSupport RAT, typically propagated via bogus websites and fake browser updates, grants attackers full control over the victim's host, allowing them to monitor the device's screen in real-time, control the keyboard and mouse, upload and download files, and launch and execute malicious commands. Originally known as NetSupport Manager, it was developed as a legitimate remote IT support program, but has since been repurposed by malicious actors to target organizations and capture sensitive information, including screenshots, audio, video, and files. "ClickFix is a technique used by threat actors to inject a fake CAPTCHA webpage on compromised websites, instructing users to follow certain steps to copy and execute malicious PowerShell commands on their host to download and run malware payloads," eSentire said in an...

A previously undocumented threat actor known as Silent Lynx has been linked to cyber attacks targeting various entities in Kyrgyzstan and Turkmenistan. "This threat group has previously targeted entities around Eastern Europe and Central Asian government think tanks involved in economic decision making and banking sector," Seqrite Labs researcher Subhajeet Singha said in a technical report published late last month. Targets of the hacking group's attacks include embassies, lawyers, government-backed banks, and think tanks. The activity has been attributed to a Kazakhstan-origin threat actor with a medium level of confidence. The infections commence with a spear-phishing email containing a RAR archive attachment that ultimately acts as a delivery vehicle for malicious payloads responsible for granting remote access to the compromised hosts. The first of the two campaigns, detected by the cybersecurity company on December 27, 2024, leverages the RAR archive to launc...

Brazilian Windows users are the target of a campaign that delivers a banking malware known as Coyote . "Once deployed, the Coyote Banking Trojan can carry out various malicious activities, including keylogging, capturing screenshots, and displaying phishing overlays to steal sensitive credentials," Fortinet FortiGuard Labs researcher Cara Lin said in an analysis published last week. The cybersecurity company said it discovered over the past month several Windows Shortcut (LNK) file artifacts that contain PowerShell commands responsible for delivering the malware. Coyote was first documented by Kaspersky in early 2024, detailing its attacks targeting users in the South American nation. It's capable of harvesting sensitive information from over 70 financial applications. In the previous attack chain documented by the Russian cybersecurity firm, a Squirrel installer executable is used to trigger a Node.js application compiled with Electron, that, for its part, runs a...

Threat hunters have detailed an ongoing campaign that leverages a malware loader called MintsLoader to distribute secondary payloads such as the StealC information stealer and a legitimate open-source network computing platform called BOINC . "MintsLoader is a PowerShell based malware loader that has been seen delivered via spam emails with a link to Kongtuke/ClickFix pages or a JScript file," cybersecurity firm eSentire said in an analysis. The campaign has targeted electricity, oil and gas, and the legal services sectors in the United States and Europe, per the company, which detected the activity in early January 2025. The development comes amid a spike in malicious campaigns that are abusing fake CAPTCHA verification prompts to trick users into copying and executing PowerShell scripts to get around the checks, a technique that has come to be known ClickFix and KongTuke. "KongTuke involves an injected script that currently causes associated websites to displa...

Cybersecurity researchers are calling attention to a new malware campaign that leverages fake CAPTCHA verification checks to deliver the infamous Lumma information stealer. "The campaign is global, with Netskope Threat Labs tracking victims targeted in Argentina, Colombia, the United States, the Philippines, and other countries around the world," Leandro Fróes, senior threat research engineer at Netskope Threat Labs, said in a report shared with The Hacker News. "The campaign also spans multiple industries, including healthcare, banking, and marketing, with the telecom industry having the highest number of organizations targeted." The attack chain begins when a victim visits a compromised website, which directs them to a bogus CAPTCHA page that specifically instructs the site visitor to copy and paste a command into the Run prompt in Windows that uses the native mshta.exe binary to download and execute an HTA file from a remote server. It's worth noting...