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A new malware strain known as BundleBot has been stealthily operating under the radar by taking advantage of  .NET single-file deployment techniques , enabling threat actors to capture sensitive information from compromised hosts. "BundleBot is abusing the dotnet bundle (single-file), self-contained format that results in very low or no static detection at all," Check Point  said  in a report published this week, adding it is "commonly distributed via Facebook Ads and compromised accounts leading to websites masquerading as regular program utilities, AI tools, and games." Some of these websites aim to mimic Google Bard, the company's conversational generative artificial intelligence chatbot, enticing victims into downloading a bogus RAR archive ("Google_AI.rar") hosted on legitimate cloud storage services such as Dropbox. The archive file, when unpacked, contains an executable file ("GoogleAI.exe"), which is the .NET single-file, self-con...

Targets located in Azerbaijan have been singled out as part of a new campaign that's designed to deploy Rust-based malware on compromised systems. Cybersecurity firm Deep Instinct is tracking the operation under the name Operation Rusty Flag. It has not been associated with any known threat actor or group. "The operation has at least two different initial access vectors," security researchers Simon Kenin, Ron Ben Yizhak, and Mark Vaitzman  said  in an analysis published last week. "One of the lures used in the operation is a modified document that was used by the Storm-0978 group. This could be a deliberate 'false flag.'" The attack chain leverages an LNK file named 1.KARABAKH.jpg.lnk as a launchpad to retrieve a second-stage payload, an MSI installer, hosted on Dropbox. The installer file, for its part, drops an implant written in Rust, an XML file for a scheduled task to execute the implant, and a decoy image file that features watermarks of the ...

An unofficial patch has been made available for an actively exploited security flaw in Microsoft Windows that makes it possible for files signed with malformed signatures to sneak past Mark-of-the-Web ( MotW ) protections. The fix,  released  by 0patch, arrives weeks after HP Wolf Security  disclosed  a Magniber ransomware campaign that targets users with fake security updates which employ a JavaScript file to proliferate the file-encrypting malware. While files downloaded from the internet in Windows are tagged with a MotW flag to prevent unauthorized actions, it has since been found that corrupt Authenticode signatures can be used to allow the execution of arbitrary executables without any  SmartScreen warning . Authenticode  is a Microsoft code-signing technology that authenticates the identity of the publisher of a particular piece of software and verifies whether the software was tampered with after it was signed and published. "The [JavaScript] ...

Cybersecurity researchers have warned of a new spear-phishing campaign that uses a legitimate remote access tool called Netbird to target Chief Financial Officers (CFOs) and financial executives at banks, energy companies, insurers, and investment firms across Europe, Africa, Canada, the Middle East, and South Asia.  "In what appears to be a multi-stage phishing operation, the attackers aimed to deploy NetBird, a legitimate wireguard-based remote access tool on the victim's computer," Trellix researcher Srini Seethapathy said in an analysis. The activity, first detected by the cybersecurity company in mid-May 2025, has not been attributed to a known threat actor or group. The starting point of the attack is a phishing email that impersonates a recruiter from Rothschild & Co. and claims to offer a "strategic opportunity" with the company. The email is designed to entice the recipients into opening a purported PDF attachment that, in reality, is a phishin...

Cybersecurity researchers have uncovered an ongoing malvertising campaign that abuses Meta's advertising platform and hijacked Facebook accounts to distribute an information stealer known as SYS01stealer. "The hackers behind the campaign use trusted brands to expand their reach," Bitdefender Labs said in a report shared with The Hacker News. "The malvertising campaign leverages nearly a hundred malicious domains, utilized not only for distributing the malware but also for live command and control (C2) operations, allowing threat actors to manage the attack in real-time." SYS01stealer was first documented by Morphisec in early 2023, describing attack campaigns targeting Facebook business accounts using Google ads and fake Facebook profiles that promote games, adult content, and cracked software. Like other stealer malware, the end goal is to steal login credentials, browsing history, and cookies. But it's also focused on obtaining Facebook ad and busin...

No fewer than 1,220 Man-in-the-Middle (MitM) phishing websites have been discovered as targeting popular online services like Instagram, Google, PayPal, Apple, Twitter, and LinkedIn with the goal of hijacking users' credentials and carrying out further follow-on attacks. The findings come from a  new study  undertaken by a group of researchers from Stony Brook University and Palo Alto Networks, who have demonstrated a new fingerprinting technique that makes it possible to identify MitM phishing kits in the wild by leveraging their intrinsic network-level properties, effectively automating the discovery and analysis of phishing websites. Dubbed " PHOCA " — named after the Latin word for "seals" — the tool not only facilitates the discovery of previously unseen MitM phishing toolkits, but also can be used to detect and isolate malicious requests coming from such servers. Phishing toolkits aim to  automate and streamline  the work required by attackers to cond...

An unofficial security patch has been made available for a new Windows zero-day vulnerability in the Microsoft Support Diagnostic Tool (MSDT), even as the Follina flaw continues to be exploited in the wild. The issue — referenced as  DogWalk  — relates to a path traversal flaw that can be exploited to stash a malicious executable file to the Windows Startup folder when a potential target opens a specially crafted ".diagcab" archive file that contains a diagnostics configuration file. The idea is that the payload would get executed the next time the victim logs in to the system after a restart. The vulnerability affects all Windows versions, starting from Windows 7 and Server Server 2008 to the latest releases. DogWalk was originally  disclosed  by security researcher Imre Rad in January 2020 after Microsoft, having acknowledged the problem, deemed it as not a security issue. "There are a number of file types that can execute code in such a way but aren't techni...

A Vietnamese-speaking threat actor has been linked to an information-stealing campaign targeting government and education entities in Europe and Asia with a new Python-based malware called PXA Stealer . The malware "targets victims' sensitive information, including credentials for various online accounts, VPN and FTP clients, financial information, browser cookies, and data from gaming software," Cisco Talos researchers Joey Chen, Alex Karkins, and Chetan Raghuprasad said . "PXA Stealer has the capability to decrypt the victim's browser master password and uses it to steal the stored credentials of various online accounts" The connections to Vietnam stem from the presence of Vietnamese comments and a hard-coded Telegram account named " Lone None " in the stealer program, the latter of which includes an icon of Vietnam's national flag and a picture of the emblem for Vietnam's Ministry of Public Security. Cisco Talos said it observed th...

A recent malware campaign has been found to leverage  Satacom downloader  as a conduit to deploy stealthy malware capable of siphoning cryptocurrency using a rogue extension for Chromium-based browsers. "The main purpose of the malware that is dropped by the Satacom downloader is to steal BTC from the victim's account by performing web injections into targeted cryptocurrency websites," Kaspersky researchers Haim Zigel and Oleg Kupreev  said . Targets of the campaign include Coinbase, Bybit, KuCoin, Huobi, and Binance users primarily located in Brazil, Algeria, Turkey, Vietnam, Indonesia, India, Egypt, and Mexico. Satacom downloader, also called  Legion Loader , first emerged in 2019 as a dropper for next-stage payloads, including information stealers and cryptocurrency miners. Infection chains involving the malware begin when users searching for cracked software are redirected to bogus websites that host ZIP archive files containing the malware. "Various types ...

Today, every unpatched system, leaked password, and overlooked plugin is a doorway for attackers. Supply chains stretch deep into the code we trust, and malware hides not just in shady apps — but in job offers, hardware, and cloud services we rely on every day. Hackers don't need sophisticated exploits anymore. Sometimes, your credentials and a little social engineering are enough. This week, we trace how simple oversights turn into major breaches — and the silent threats most companies still underestimate. Let's dive in. ⚡ Threat of the Week UNC5221 Exploits New Ivanti Flaw to Drop Malware — The China-nexus cyber espionage group tracked as UNC5221 exploited a now-patched flaw in Ivanti Connect Secure, CVE-2025-22457 (CVSS score: 9.0), to deliver an in-memory dropper called TRAILBLAZE, a passive backdoor codenamed BRUSHFIRE, and the SPAWN malware suite. The vulnerability was originally patched by Ivanti on February 11, 2025, indicating that the threat actors studied the patch a...

Cybersecurity researchers have discovered a new, sophisticated variant of a known Android malware referred to as Konfety that leverages the evil twin technique to enable ad fraud. The sneaky approach essentially involves a scenario wherein two variants of an application share the same package name: A benign "decoy" app that's hosted on the Google Play Store and its evil twin, which is distributed via third-party sources. It's worth pointing out that the decoy apps don't have to be necessarily published by threat actors themselves and could be legitimate. The only caveat is that the malicious apps share the exact same package names as their real counterparts already available on the Play Store.  "The threat actors behind Konfety are highly adaptable, consistently altering their targeted ad networks and updating their methods to evade detection," Zimperium zLabs researcher Fernando Ortega said . "This latest variant demonstrates their sophisticat...

Malware isn't just trying to hide anymore—it's trying to belong. We're seeing code that talks like us, logs like us, even documents itself like a helpful teammate. Some threats now look more like developer tools than exploits. Others borrow trust from open-source platforms, or quietly build themselves out of AI-written snippets. It's not just about being malicious—it's about being believable. In this week's cybersecurity recap, we explore how today's threats are becoming more social, more automated, and far too sophisticated for yesterday's instincts to catch. ⚡ Threat of the Week Secret Blizzard Conduct ISP-Level AitM Attacks to Deploy ApolloShadow — Russian cyberspies are abusing local internet service providers' networks to target foreign embassies in Moscow and likely collect intelligence from diplomats' devices. The activity has been attributed to the Russian advanced persistent threat (APT) known as Secret Blizzard (aka Turla). It likely involves using an adversary-...

The Computer Emergency Response Team of Ukraine (CERT-UA) has disclosed details of a phishing campaign that's designed to deliver a malware codenamed LAMEHUG . "An obvious feature of LAMEHUG is the use of LLM (large language model), used to generate commands based on their textual representation (description)," CERT-UA said in a Thursday advisory. The activity has been attributed with medium confidence to a Russian state-sponsored hacking group tracked as APT28 , which is also known as Fancy Bear, Forest Blizzard, Sednit, Sofacy, and UAC-0001. The cybersecurity agency said it found the malware after receiving reports on July 10, 2025, about suspicious emails sent from compromised accounts and impersonating ministry officials. The emails targeted executive government authorities. Present within these emails was a ZIP archive that, in turn, contained the LAMEHUG payload in the form of three different variants named "Додаток.pif, "AI_generator_uncensored_Can...