Microsoft reveals how ShinyHunters spent a year targeting organizations with phishing, social engineering and cloud attacks.

Microsoft has released new threat intelligence detailing how the cybercrime group ShinyHunters spent more than a year carrying out coordinated attacks against organizations worldwide, relying heavily on social engineering rather than software exploits to gain access to corporate networks. The findings were published in July 2026 as the company continues tracking the group’s evolving tactics.

According to Microsoft, the campaign centered on convincing employees to hand over credentials through carefully orchestrated phishing operations, voice-based social engineering, and fake authentication portals. Once inside an organization’s environment, the attackers sought to obtain privileged access before moving laterally through cloud services and enterprise applications.

Rather than exploiting zero-day vulnerabilities, Microsoft said ShinyHunters consistently abused legitimate identity and authentication workflows. The company observed the group targeting single sign-on (SSO) platforms and cloud identities, allowing them to access connected services while appearing as legitimate users.

The threat actor has been linked to a growing number of high-profile data theft and extortion incidents over the past year. Microsoft’s investigation found that the group adapts its techniques depending on the target but frequently combines phishing infrastructure, credential harvesting, and multi-factor authentication (MFA) bypass tactics to obtain persistent access.

Once access is established, the attackers focus on locating valuable corporate data, which is then exfiltrated for use in extortion campaigns. Victims are typically pressured into paying ransoms to prevent sensitive information from being published or sold online.

Microsoft’s analysis indicates that the operation evolved throughout the year, with the group continually refining its infrastructure and social engineering techniques to improve success rates. The company noted that these attacks demonstrate how human-focused intrusion methods continue to outperform purely technical exploits against many organizations.

The report also reinforces a broader trend seen across recent ShinyHunters activity, where cloud environments and identity providers have become primary targets. Security researchers have previously linked the group to numerous breaches involving enterprise cloud platforms, with many attacks beginning through stolen credentials rather than vulnerabilities in the affected software.

To reduce the risk of similar compromises, Microsoft recommends organizations strengthen identity security by deploying phishing-resistant multi-factor authentication, limiting privileged access, monitoring for unusual authentication activity, and providing regular employee awareness training. Additional protections, including conditional access policies and continuous monitoring of cloud identities, can help detect suspicious behavior before attackers are able to move deeper into a network.

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Microsoft Details Year-Long ShinyHunters Campaign