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Key Findings In August 2025, Kaspersky researchers discovered a new Android banking Trojan dubbed "Frogblight" targeting individuals in Turkey. The malware initially disguised itself as an app for accessing court case files via an official government webpage, but later adopted more universal disguises like the Chrome browser. Frogblight can use official government websites as an intermediary step to steal banking credentials and has spyware capabilities to collect SMS message

Key Findings: Sophisticated phishing campaign targeting Russian finance sector, using high-quality social engineering to bypass defenses. Malware dubbed "Phantom Stealer" deployed via malicious ISO files attached to phishing emails. Phantom Stealer equipped with aggressive data-harvesting modules targeting crypto wallets, chat apps, and browser data. Malware includes anti-analysis checks to evade security researchers. Campaign highlights shift towards ISO-based initial access

Key Findings Elastic Security Labs has uncovered a sophisticated new Windows backdoor called NANOREMOTE that leverages the Google Drive API for covert command-and-control (C2) and data exfiltration operations. NANOREMOTE employs legitimate cloud services to blend its malicious traffic with normal network activity, making it extremely difficult for traditional security tools to detect. The malware uses OAuth 2.0 tokens to authenticate with Google's servers and create a covert

Key Findings A new campaign is leveraging GitHub-hosted Python repositories to distribute a previously undocumented JavaScript-based Remote Access Trojan (RAT) dubbed PyStoreRAT. The malicious repositories, often themed as development utilities or OSINT tools, contain code responsible for silently downloading and executing a remote HTA file. PyStoreRAT is a modular, multi-stage implant that can execute various payloads, including an information stealer known as Rhadamanthys.

Key Findings: A high-severity unpatched security vulnerability in Gogs (CVE-2025-8110) with a CVSS score of 8.7 is under active exploitation, affecting over 700 compromised instances accessible online. The vulnerability allows for file overwrite in the file update API, enabling an attacker to achieve arbitrary code execution through a four-step process. The malware deployed in the attacks is a payload based on Supershell, an open-source command-and-control (C2) framework ofte

Key Findings React2Shell vulnerability (CVE-2025-55182) in React version 19 and React Server Components (RSC) is being heavily exploited by threat actors Exploitation attempts have been observed targeting a wide range of sectors, particularly construction and entertainment industries Attackers are leveraging the vulnerability to deliver cryptocurrency miners and a variety of previously undocumented malware, including: PeerBlight Linux backdoor CowTunnel reverse proxy tunnel Z

Key Findings Trend Micro's AI-driven threat hunting pipeline discovered a previously unknown and undetectable Linux backdoor called "GhostPenguin" GhostPenguin had zero detections on VirusTotal for over four months before being identified The sophisticated, multi-threaded backdoor is written in C++ and uses RC5-encrypted UDP for covert Command and Control (C2) communications Background GhostPenguin was first submitted to VirusTotal on July 7, 2025, but remained completely inv

Key Findings: Cybersecurity agencies in the US and Canada have issued an alert about a new malware called BRICKSTORM, believed to be used by state-sponsored hackers from China. BRICKSTORM is a backdoor that gives attackers stealthy access and control over targeted systems, primarily focusing on VMware vSphere platforms. The hackers have been observed targeting organizations in the Government Services, Facilities, and Information Technology sectors. The malware uses advanced t

Key Findings North Korea-linked actors behind the Contagious Interview campaign have uploaded 197 new malicious npm packages to distribute a new version of the OtterCookie malware. The Contagious Interview campaign, active since November 2023, targets software developers on Windows, Linux, and macOS, with a focus on those working in crypto and Web3. Attackers pose as recruiters on platforms like LinkedIn and use social engineering tactics, including fake job interviews and tr

Key Findings North Korean threat actors behind the Contagious Interview campaign have flooded the npm registry with 197 more malicious packages since last month These packages have been downloaded over 31,000 times and are designed to deliver a variant of OtterCookie malware The malware attempts to evade sandboxes and virtual machines, profiles the machine, and establishes a command-and-control (C2) channel to provide the attackers with remote shell access and capabilities to

Key Findings Cybersecurity researchers have discovered a malicious Chrome extension named "Crypto Copilot" that injects hidden Solana transfer fees into Raydium swap transactions. The extension silently appends an extra transfer instruction to each swap, siphoning a minimum of 0.0013 SOL or 0.05% of the trade amount to an attacker-controlled wallet. The malicious behavior is concealed through obfuscation techniques, and the extension's user interface only shows the legitimate

Key Findings Microsoft Teams' "Guest Access" feature allows attackers to bypass security controls like Microsoft Defender for Office 365, creating a "protection-free zone" for malware delivery. Attackers can easily create basic Microsoft 365 accounts without security features and use them to send phishing links and malware to guest users. A recent Microsoft feature that allows any Teams user to start a chat with any email address makes it even easier for attackers to lure vic

Key Findings CISA has issued an alert warning of threat actors actively using commercial spyware and remote access trojans (RATs) to target users of mobile messaging apps like Signal and WhatsApp. The attackers employ sophisticated social engineering and targeting techniques to deliver spyware and gain unauthorized access to victims' messaging apps, enabling further device compromise. The targeting appears opportunistic but often focuses on high-value individuals such as gove

Key Findings China-linked APT24 group used supply-chain attacks and multiple techniques over three years to deploy the BadAudio downloader and additional malware payloads The group shifted from broad web compromises to more advanced techniques targeting Taiwan, including repeated supply-chain attacks through a compromised marketing firm and spear-phishing attacks BadAudio is a custom C++ first-stage downloader that pulls an AES-encrypted payload from a fixed C2 server and run

Key Findings Sturnus is a new Android banking trojan with full device-takeover capabilities It targets secure messaging apps like WhatsApp, Telegram, and Signal to bypass encryption and steal sensitive data Sturnus employs sophisticated techniques like HTML overlays and accessibility-based keylogging to capture on-screen content, including messages, contacts, and credentials The malware enables remote control of infected devices through screen mirroring and a structured UI ma

Key Findings New Android banking trojan called Sturnus enables credential theft and full device takeover for financial fraud Key differentiator is ability to bypass encrypted messaging on apps like WhatsApp, Telegram, and Signal Captures content directly from device screen after decryption, allowing monitoring of private communications Stages overlay attacks to steal banking credentials and leverages accessibility services for extensive device control Blocks uninstallation at

Key Findings In Q3 2025, Kaspersky Security Network prevented 47 million attacks involving mobile malware, adware, or unwanted software. Trojans were the most widespread mobile malware, affecting 15.78% of attacked users. Over 197,000 malicious installation packages were discovered, including 52,723 associated with mobile banking Trojans and 1,564 identified as mobile ransomware. Background The Kaspersky Security Network (KSN) is a global network for analyzing anonymized thre

Key Findings Seven npm packages published by a threat actor using the alias "dino_reborn" were found to be part of a highly coordinated malware campaign The packages use Adspect-powered cloaking, anti-analysis JavaScript, and fake CAPTCHA interfaces to funnel unsuspecting victims toward malicious payloads while hiding their activity from security researchers The threat actor built an entire fake website to serve security researchers while real victims are redirected through a

Key Findings: RondoDox botnet malware is targeting unpatched XWiki instances to exploit a critical remote code execution vulnerability (CVE-2025-24893). The vulnerability, with a CVSS score of 9.8, allows any guest user to execute arbitrary code through a request to the "/bin/get/Main/SolrSearch" endpoint. The flaw was patched by XWiki in versions 15.10.11, 16.4.1, and 16.5.0RC1 released in late February 2025. Evidence shows the vulnerability has been exploited in the wild si

Key Findings North Korean threat actors behind the Contagious Interview campaign have adopted a new tactic of using JSON storage services to host and deliver malware. The campaign involves approaching targets on professional networking sites under the pretext of a job assessment or project collaboration, instructing them to download a demo project hosted on platforms like GitHub, GitLab, or Bitbucket. In one such project, a file named "server/config/.config.env" contains a Ba