Recent reports have highlighted a significant cybersecurity threat involving the exploitation of a vulnerability in the Windows Common Log File System (CLFS) by the RansomEXX ransomware gang. This vulnerability, identified as CVE-2025-29824, allows attackers to gain SYSTEM privileges through low-complexity attacks that do not require user interaction. Microsoft has released patches for most of the affected Windows versions, though updates for Windows 10 LTSB 2015 are still pending. The exploitation has been observed in targeted attacks against sectors such as IT, real estate, finance, and retail across various countries.
The RansomEXX group, also known as Storm-2460, has been linked to these attacks. They have utilized the PipeMagic backdoor malware to deploy the CVE-2025-29824 exploit and subsequent ransomware payloads. This backdoor is capable of harvesting sensitive data and providing remote access to compromised systems, facilitating further malicious activities. The group has a history of targeting high-profile organizations globally, indicating a persistent and evolving threat.
In addition to the CLFS vulnerability, the PipeMagic malware has been associated with other exploits, including a Windows Win32 Kernel Subsystem vulnerability (CVE-2025-24983). This highlights the group's capability to leverage multiple vulnerabilities to achieve their objectives. Organizations are urged to apply the latest security updates promptly to mitigate these risks.
The broader cybersecurity landscape continues to be shaped by sophisticated attack techniques. An analysis of 14 million malicious actions has identified the top 10 MITRE ATT&CK techniques responsible for 93% of attacks. Understanding and defending against these techniques is crucial for enhancing organizational security postures.
The primary threat discussed is the exploitation of CVE-2025-29824, a vulnerability in the Windows CLFS. This use-after-free flaw allows local attackers with low privileges to escalate their access to SYSTEM privileges. The vulnerability has been actively exploited by the RansomEXX ransomware gang in targeted attacks across various sectors, including IT, real estate, finance, and retail.
The RansomEXX group employs the PipeMagic backdoor malware to facilitate these attacks. PipeMagic is capable of harvesting sensitive data and providing full remote access to infected devices. It also enables attackers to deploy additional malicious payloads, allowing lateral movement within victim networks. This backdoor has been used in conjunction with other exploits, such as CVE-2025-24983, demonstrating the group's ability to leverage multiple vulnerabilities.
The RansomEXX operation has a history of targeting high-profile organizations worldwide. Their activities have included attacks on entities such as GIGABYTE, Konica Minolta, and various government agencies. This underscores the group's focus on high-value targets and their potential impact on critical infrastructure and services.
Clients across various industries may face significant risks due to these threats. The exploitation of CVE-2025-29824 can lead to operational disruptions, data breaches, and financial losses. Organizations in sectors such as IT, real estate, finance, and retail are particularly vulnerable due to the targeted nature of these attacks. The use of ransomware can result in encrypted data and demands for ransom payments, further exacerbating financial and reputational damage.
From a compliance perspective, organizations must be aware of potential regulatory challenges arising from data breaches or operational disruptions. Failure to address these vulnerabilities could lead to audits or penalties under data protection regulations such as GDPR or industry-specific standards.
To mitigate the identified risks, clients are advised to take the following actions:
1. Apply the latest security updates from Microsoft for all affected Windows versions to address CVE-2025-29824.
2. Monitor network traffic for signs of PipeMagic backdoor activity and implement endpoint detection solutions to identify and block malicious behavior.
3. Conduct regular security assessments and penetration testing to identify potential vulnerabilities within your systems.
4. Implement robust backup solutions and ensure that critical data is regularly backed up and stored securely offline.
5. Educate employees on recognizing phishing attempts and other social engineering tactics commonly used by ransomware groups.
6. Review and update incident response plans to ensure they are effective in addressing ransomware incidents.
By taking these steps, organizations can reduce their exposure to these threats and enhance their overall security posture. Continuous monitoring and proactive security measures are essential in defending against sophisticated cyber threats like those posed by the RansomEXX group.
1898 & Co is actively addressing the current threat landscape by offering specialized services designed to combat emerging threats like those posed by the RansomEXX ransomware gang. Our team provides tailored threat intelligence services that help clients understand and mitigate risks specific to their industry and operational environment.
We have updated our security protocols to incorporate the latest threat intelligence insights and are collaborating with industry partners and government agencies to share information on emerging threats. Our ongoing research efforts focus on identifying new attack vectors and developing innovative solutions to protect our clients' critical assets.
Our case studies demonstrate successful mitigations against similar threats, showcasing our ability to effectively respond to complex cybersecurity challenges. Clients can rely on our expertise to navigate the evolving threat landscape and implement robust security measures that align with their unique needs.