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Attackers distributed malicious Windows shortcut (.LNK) files disguised as privacy consent forms and other work-related documents, tricking users into launching obfuscated PowerShell that fetched additional payloads from external infrastructure. Reporting indicates GitHub was used as a covert stage in the infection chain, helping operators blend malicious downloads and command retrieval into legitimate web traffic while keeping much of the activity fileless and in memory.
Once executed, the malware created downloader and loader scripts, established persistence through Windows Task Scheduler, opened decoy documents to reduce suspicion, and deleted the original shortcut to limit forensic artifacts. Observed follow-on payloads included an information stealer and a backdoor loader that decrypted and loaded malware into memory; the theft activity gathered host, security product, network, IP, drive, file, and process data, with behavior resembling prior Kimsuky-linked operations.
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2 events from the most recent confirmed update back to the earliest known activity.
AhnLab ASEC published analysis of a malware campaign using Windows shortcut files disguised as privacy consent forms and other work-related documents. The LNK files executed obfuscated PowerShell, downloaded additional payloads filelessly, established persistence via Task Scheduler, and in some cases deployed information-stealing and backdoor components linked by behavior to prior Kimsuky activity.
Infosecurity Magazine reported on a multi-stage malware campaign that used GitHub as a covert channel for malware delivery and control.
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Multiple recent intrusion reports describe **phishing-led Windows compromises** that rely on **weaponized `.LNK` shortcuts** to trigger **obfuscated PowerShell** execution, display decoy documents, and then fetch additional payloads from public cloud/code platforms. In South Korea, attackers distributed an LNK disguised as financial trading guidance that opens a decoy PDF while running PowerShell; subsequent stages perform anti-analysis/virtualization checks, establish persistence, and retrieve a masked executable from **GitHub** that decrypts code at runtime to run **MoonPeak** malware. Researchers assessed the activity as likely **North Korea–linked** based on GitHub commit metadata and naming patterns. A separate Russia-targeted campaign used business-themed archives containing decoy documents and a malicious LNK to pull a PowerShell loader that establishes persistence and then weakens defenses (including **Microsoft Defender exclusion changes** and use of **`defendnot`**), performs reconnaissance, and tampers with system tooling and file associations before deploying **Amnesia RAT** (fetched from **Dropbox**) and a **Hakuna Matata–derived ransomware** payload for encryption. By contrast, reporting on **KazakRAT** describes a different espionage operation in Kazakhstan/Afghanistan delivered via malicious **MSI** installers and using simple, unencrypted HTTP C2; it is not part of the LNK/PowerShell delivery chains described in the other incidents.
Jun 29, 2026
Fortinet/FortiGuard researchers reported a **multi-stage Windows malware campaign** that relies on *social engineering rather than exploiting a software vulnerability*, using business-themed lures delivered in compressed archives. The initial file is a **malicious `.LNK` shortcut** crafted to look like a benign document; when opened it launches **PowerShell** with execution-policy bypasses to fetch a first-stage loader from cloud services (notably **GitHub** and **Dropbox**) while displaying decoy content to reduce user suspicion. Reporting indicates the chain includes staged scripts (e.g., obfuscated/encrypted VBScript reconstructed in memory) and “phone-home” signaling (including **Telegram bot** notifications) to confirm execution and continue payload delivery. A key characteristic of the campaign is **systematic defense evasion**, including disabling or neutralizing **Microsoft Defender** and other Windows security controls and impairing recovery options, enabling follow-on actions such as data theft, remote access, and in some cases **file encryption**. Separate reporting in this set describes other, unrelated activity (FortiGate SSO bypass exploitation, a general weekly threat bulletin, Iran/Starlink connectivity issues, a watering-hole targeting EmEditor users, a China-linked espionage campaign targeting India, and generic “common threats” guidance) and does not materially change the technical picture of the FortiGuard-described Windows LNK/PowerShell multi-stage malware chain.
Jun 29, 2026
FortiGuard Labs reported a high-severity cyber espionage campaign linked to North Korean state-sponsored actors that targets organizations in South Korea with phishing emails carrying malicious Windows `.lnk` files disguised as PDF documents. When opened, the shortcut launches PowerShell and other native Windows scripting tools while showing a decoy document, then performs anti-analysis checks for tools including Wireshark, Fiddler, x64dbg, Procmon, and `vmtoolsd`. Researchers said the operation has been active since at least 2024 and has evolved from earlier, less-obfuscated variants associated with XenoRAT into more sophisticated samples that embed decoding logic and payload data directly in the shortcut file. The malware establishes persistence through a Scheduled Task disguised as a technical paper and set to run every 30 minutes, then collects host data such as OS version, build number, process lists, and keep-alive logs. Operators used trusted GitHub accounts and private repositories as covert command-and-control and data-staging infrastructure, allowing malicious HTTPS traffic to blend with normal web activity while exfiltrating system information and retrieving follow-on instructions. Decoy filenames and metadata, including the "Hangul Document" naming convention, indicate deliberate targeting of South Korean companies and tradecraft aligned with clusters such as **Kimsuky**, **APT37**, and **Lazarus**.
Jun 29, 2026