New Threat Cluster OP-512 Targets Microsoft IIS Servers with Custom W… | HappeningNow.news

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New Threat Cluster OP-512 Targets Microsoft IIS Servers with Custom Web Shell Framework

Cybersecurity researchers have discovered a previously unreported threat cluster dubbed OP-512 (where "OP" stands for "opponent") that has been observed targeting Microsoft Internet Information Services (IIS) servers to deploy a bespoke…

Source AI Summary Published June 5, 2026 Brief Under 1 min brief
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Researchers have identified a new threat cluster, OP-512, which targets Microsoft IIS servers. This cluster deploys a custom web shell framework, indicating a focus on espionage. The framework is designed to be used on compromised servers, allowing attackers to maintain control and gather sensitive information. The connection to China is based on ReliaQuest's assessment with moderate to high confidence, suggesting a potential state-sponsored operation.

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