Cybersecurity researchers have discovered a previously unreported threat cluster dubbed OP-512 that has been observed targeting Microsoft Internet Information Services (IIS) servers to deploy a bespoke web shell framework.
ReliaQuest has assessed with moderate to high confidence that the espionage-focused activity is linked to China.
"OP-512 was highly likely conducting espionage through a
source https://thehackernews.com/2026/06/new-threat-cluster-op-512-targets.html
Friday, June 5, 2026
New Threat Cluster OP-512 Targets Microsoft IIS Servers with Custom Web Shell Framework
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