Threat Actors Exploit Calendar Subscriptions for Phishing and Malware Delivery
BitSight research has revealed how threat actors exploit calendar subscriptions to deliver phishing links, malware and social engineering attacks through hijacked domains
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Background for this topic.
An exploit is code, data, or a sequence of actions that uses a software, hardware, or configuration vulnerability to produce unintended behavior. Depending on the flaw and the attacker’s access, it may enable unauthorized code execution, privilege escalation, information disclosure, or denial of service. Exploitation can occur remotely through exposed services, web applications, or client software, or locally after an attacker gains limited access.
Exploitation matters because a vulnerability becomes an active attack path when the required conditions are reachable and exploitable. Defenders should inventory affected assets, prioritize remediation when exploitation is known or credible, apply patches or vendor mitigations, and reduce exposure through access controls, segmentation, and secure configuration. Monitoring for exploit-specific indicators—such as abnormal requests, unexpected processes, or privilege changes—supports detection; systems suspected of successful exploitation require containment and investigation for follow-on access.
BitSight research has revealed how threat actors exploit calendar subscriptions to deliver phishing links, malware and social engineering attacks through hijacked domains
A new Bloody Wolf campaign exploits legitimate remote-administration software for cyber-attacks on government targets in Central Asia