Hackers are abusing unpatched Windows security flaws to hack into organizations

Unpatched flaws in Microsoft's built-in antivirus are being actively exploited in targeted attacks, security researchers warn. | Contesto: cronaca

Punti chiave

• Hackers are abusing unpatched Windows security flaws to hack into organizations

Contesto

Hackers are actively exploiting multiple unpatched security vulnerabilities in Microsoft's Windows Defender antivirus software to breach corporate networks, according to a new warning from cybersecurity researchers. The critical flaws, detailed publicly by a security researcher last week, exist within the core malware scanning engine used by hundreds of millions of Windows devices globally. The publication included functional exploit code, which threat actors have now weaponized for real-world attacks against organizations. The vulnerabilities, three in total, reside in a fundamental component of the Windows operating system. Windows Defender, known as Microsoft Defender in its current iteration, is not a standalone application but an integrated security service that runs with high-level system privileges. This deep integration, designed to provide robust protection against malware, has created a paradox: a flaw in the defender itself becomes a high-value target, offering attackers a direct path to take control of a system. The researcher's disclosure revealed that by crafting a malicious file in a specific way, an attacker could trick Defender's scanner into executing arbitrary code while it examines the file. The public release of proof-of-concept exploit code has dramatically accelerated the threat. Within days of the technical details appearing online, cybersecurity firms observed the same exploitation methods being deployed in active campaigns. This rapid weaponization highlights a grim reality of modern cybersecurity: the window between public disclosure of a flaw and its widespread abuse is shrinking to near zero. Organizations that have not yet applied mitigations are now exposed, with their primary security tool potentially serving as the entry point for an intrusion. The implications of these attacks are severe. Successful exploitation grants attackers the same system privileges as Windows Defender, which are typically extensive. This access can be used to disable security software, install persistent backdoors, steal sensitive data, or move laterally across a network. For targeted organizations, the breach of a core security pillar undermines trust...

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Categoria: cronaca