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Gootloader malware has re-emerged after a period of inactivity, deploying new techniques to compromise victims through SEO poisoning and malicious JavaScript injected into compromised or attacker-controlled websites. Recent attacks observed by Huntress and other researchers show Gootloader being used to gain initial access to corporate networks, with one incident resulting in a Domain Controller compromise within 17 hours. The loader, operated by the threat actor Storm-0494, provides access to Vanilla Tempest, which then deploys backdoors such as the Supper SOCKS5 and ultimately delivers ransomware, including the Rhysida family. The infection chain leverages obfuscated JavaScript, custom WOFF2 fonts, and XOR-encrypted ZIP archives, with payloads tailored to evade static analysis and exfiltrate sensitive information from active user sessions.
The distribution method relies heavily on SEO poisoning, where fake legal document and agreement template sites are promoted in search results, enticing users to download malicious files. Once executed, Gootloader runs PowerShell scripts to enumerate environment variables, running processes, and desktop files, sending this data to hardcoded C2 servers. The operation's infrastructure has been actively targeted by security researchers, leading to a temporary cessation in March 2025, but the campaign has since resumed with new tricks and payloads, including Cobalt Strike and various backdoors. The renewed activity highlights the persistent threat posed by Gootloader and its affiliates, who continue to refine their tactics to evade detection and maximize impact on targeted organizations.
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8 events from the most recent confirmed update back to the earliest known activity.
The renewed intrusions included rapid deployment of the Supper SOCKS5 backdoor for persistence and remote access. Huntress also linked the TextShell obfuscator to both Supper and OysterLoader samples associated with Vanilla Tempest.
Huntress assessed that Storm-0494 used Gootloader for initial access and then handed victims to the Vanilla Tempest operation for follow-on intrusion activity. The observed tooling and behavior were consistent with preparation for Rhysida ransomware deployment.
In two of the three observed incidents, the activity quickly progressed into hands-on-keyboard attacks, with one Windows Domain Controller compromised in 16 hours and 54 minutes. The post-compromise activity included Active Directory reconnaissance, Kerberoasting, lateral movement via WinRM, and privileged account creation.
Huntress reported seeing three Gootloader intrusions during the week prior to November 6, 2025. In at least one case, a user was infected after visiting a malicious search result tied to a compromised website.
In the renewed campaign, attackers abused WordPress comment submission endpoints to deliver XOR-encrypted ZIP payloads and used a custom WOFF2 font to disguise malicious filenames. The infections were delivered through compromised websites, including SEO-poisoned pages that ranked in Bing search results.
Huntress observed Gootloader activity resume starting on October 27, 2025, after roughly a seven-month break. The renewed campaign used SEO poisoning and compromised WordPress sites to lure victims into downloading malicious JavaScript.
After a period of reduced activity, Gootloader briefly resurfaced in March 2025 before going largely quiet again. This marked the only notable activity prior to the later fall 2025 wave described by Huntress.
Gootloader, a JavaScript-based malware family used for initial access and malware delivery, was first seen in 2020. It later became associated with intrusion chains that can lead to ransomware deployment.
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Researchers documented ongoing changes in **GootLoader**, a JavaScript-based initial-access malware family that infects Windows systems and is frequently linked to follow-on compromise with **Cobalt Strike** and ransomware. The malware is commonly distributed through **SEO poisoning** on compromised WordPress sites, where victims searching for agreement, contract, or form-related terms are redirected to fake forum pages and lured into downloading ZIP archives containing malicious JavaScript. When executed, the script establishes persistence with a scheduled task and uses PowerShell to beacon system information to multiple domains while awaiting additional payloads. Analysis of newer samples showed that GootLoader altered its obfuscation and code-rearrangement logic, breaking earlier indicator-extraction workflows that relied on a single statement pattern. Researchers updated decoder logic to capture several interdependent statements, merge extracted fragments, and preserve compatibility with older variants, while separate tooling was published to statically unpack three- and six-layer GootLoader scripts and extract command-and-control data without executing the malware. The combined work highlights an active malware ecosystem in which defenders must continuously adapt detection and IOC extraction methods as GootLoader changes its JavaScript structure and delivery tradecraft.
Aug 15, 2026
Gootloader operators compromised WordPress sites and implanted malicious PHP in theme files, plugin files, the `wp_options` table, and in some cases modified `xmlrpc.php` to selectively serve fake forum-style lure pages and malware only to filtered visitors. The infrastructure used gating based on factors such as geography, Windows user agents, logged-out status, and crawler checks, helping infected sites appear benign to most traffic. Compromised sites were observed contacting domains including `my-game.biz/5.8.18.7` to redraw pages and fetch malicious ZIP archives, while altered `xmlrpc.php` relays forwarded victim metadata to `inerino.co.za` and could return obfuscated PowerShell hidden in GIF responses. On victim systems, users commonly opened ZIP-delivered JScript files that launched via `wscript.exe` or `cscript.exe`, leading to PowerShell execution and in-memory loading of a .NET DLL. That DLL retrieved an obfuscated payload from the Windows Registry, decoded it, and executed follow-on malware including **Cobalt Strike**, **Gootkit**, and **Osiris**, showing Gootloader’s role as an initial access and malware delivery platform. Defenders were advised to watch for suspicious process chains involving `wscript.exe`, `cscript.exe`, `powershell.exe`, and `rundll32.exe` without arguments, and to reduce risk by changing JScript file associations and warning users about document-themed download lures.
Aug 15, 2026
Gootloader operators continued to refresh their command-and-control infrastructure while maintaining a malware delivery chain built on compromised WordPress sites, fake forum pages, and malicious ZIP archives containing obfuscated JavaScript. Reporting shows the actor shifted key domains and IPs over time—from `my-game.biz`, `inerino.co.za`, and `za-co-za.co.za` to `new-game[.]me`, `luckyserver777.co.za`, and most recently `hotheads.co.za` at `91.215.85.21`—with infected systems observed contacting the newest server shortly after the change. Researchers also found malicious PHP injected into WordPress files including `xmlrpc.php`, `functions.php`, `404.php`, and upload paths, with additional logic hidden in the WordPress database to collect victim metadata and relay commands. Hands-on analysis confirmed the malware remains operational despite claims it was broken: a reproduced infection on Windows 11 showed file writes, scheduled-task persistence, PowerShell execution, and outbound beaconing that encoded host-enumeration data in HTTP Cookie headers. Earlier intrusion reporting tied Gootloader to a more severe post-compromise chain in which initial JavaScript execution led to PowerShell backdoors, Cobalt Strike deployment through DLL hijacking, SystemBC use, lateral movement with remote services and PsExec, and attempts to disable Microsoft Defender. The rapid domain rotation, updated JavaScript hiding techniques, and possible dependence on newer PowerShell behavior indicate an active effort to evade detection and preserve access to Windows environments.
Aug 15, 2026