Research
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GhostPoster campaign hid JavaScript in Firefox extension icons to load backdoor
Researchers at Koi Security uncovered the GhostPoster campaign, which hides a JavaScript loader inside Firefox extension icon images to fetch an obfuscated payload that can hijack affiliate links, inject tracking, strip security headers and conduct ad and click fraud; Mozilla said it removed the affected extensions and updated detection systems.
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New ‘SantaStealer’ infostealer marketed on forums
Rapid7 researchers said a new malware-as-a-service infostealer called SantaStealer is being marketed on Telegram and forums, offers subscription plans, includes multiple data-theft modules and appears to have leaked samples that undermine claims of stealth.
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VolkLocker ransomware contains hard-coded master keys, SentinelOne analysis finds
A SentinelOne analysis says VolkLocker, a RaaS from the CyberVolk collective, contains hard-coded master keys and writes a plaintext backup key to the temporary folder, enabling file recovery without payment while still displaying typical ransomware behaviors.
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GitHub repositories used to deliver new PyStoreRAT JavaScript RAT
Researchers say GitHub-hosted Python repositories have been used to deliver a JavaScript-based RAT called PyStoreRAT that executes remote HTA payloads, deploys a Rhadamanthys stealer and includes persistence and evasion measures; Chinese vendor QiAnXin also reported a separate SetcodeRat campaign.
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Researchers Flag Four New Phishing Kits That Automate Credential Theft and MFA Bypass
Security firms have identified four phishing kits — BlackForce, GhostFrame, InboxPrime AI and Spiderman — that automate credential theft, bypass multi-factor authentication and mass-produce phishing emails, with researchers warning the tools lower barriers for large-scale attacks.
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Global privacy laws strengthen rights but enforcement and outcomes remain uneven
A 35-year review by researchers at Dakota State University finds that global privacy laws have expanded rights and obligations but enforcement and measurable reductions in harm are uneven; the study highlights uneven fines and compliance rates, growing technology-driven pressures, cross-border uncertainty and the need for metrics to track outcomes.
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Unpatched Gogs vulnerability being actively exploited; hundreds of instances compromised
Wiz researchers say a high-severity unpatched flaw in Gogs (CVE-2025-8110) is being actively exploited, with more than 700 compromised instances; the issue allows file overwrites via symbolic links and can lead to remote code execution. Researchers recommend disabling open registration, limiting internet exposure and scanning for random repositories while a fix is developed.
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North Korea-linked actors exploit React2Shell flaw to deploy EtherRAT using Ethereum-based C2
Sysdig reported that actors tied to North Korea exploited a critical React Server Components flaw to deploy EtherRAT, a Node.js-based remote access trojan that uses Ethereum smart contracts and RPC consensus for C2 resolution and multiple Linux persistence mechanisms.
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Recorded Future identifies four threat clusters using CastleLoader
Recorded Future’s Insikt Group identified four clusters using the CastleLoader malware loader, assigned the operator the name GrayBravo, and detailed distinct tactics, payloads and a multi-tiered infrastructure while noting the loader’s proliferation among other threat actors.
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Researchers find VS Code extensions that install stealer malware, Microsoft removes packages
Researchers and security firms found two malicious Visual Studio Code extensions that stole credentials, screenshots and browser data; Microsoft removed the packages and analysts warned developers to review extensions and supply-chain risks.
