{"id":13417,"date":"2026-06-06T07:03:32","date_gmt":"2026-06-06T07:03:32","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2026\/06\/06\/new-threat-cluster-op-512-targets-html\/"},"modified":"2026-06-06T07:03:32","modified_gmt":"2026-06-06T07:03:32","slug":"new-threat-cluster-op-512-targets-html","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2026\/06\/06\/new-threat-cluster-op-512-targets-html\/","title":{"rendered":"New Threat Cluster OP-512 Targets Microsoft IIS Servers with Custom Web Shell Framework"},"content":{"rendered":"<p>    New Threat Cluster OP-512 Targets Microsoft IIS Servers with Custom Web Shell Framework<br \/>\n \t<BR><br \/>\n<BR><\/BR><br \/>\n    <!-- no image --><br \/>\n \t<BR><br \/>\n<BR><\/BR><\/p>\n<div>Cybersecurity researchers have discovered a previously unreported threat cluster dubbed OP-512 (where &#8220;OP&#8221; stands for &#8220;opponent&#8221;) that has been observed\u00a0targeting Microsoft Internet Information Services (IIS) servers to deploy a bespoke web shell framework.<\/p>\n<p>ReliaQuest has assessed with moderate to high confidence that the espionage-focused activity is linked to China.<\/p>\n<p>&#8220;OP-512 was highly<\/p><\/div>\n<p> \t<BR><br \/>\n <BR><\/BR><\/p>\n<p> \t<BR><br \/>\n<BR><\/BR><br \/>\n<a href=\"https:\/\/thehackernews.com\/2026\/06\/new-threat-cluster-op-512-targets.html\">Go to TheHackersNews<\/a><br \/>\n \t<BR><br \/>\n <BR><\/BR><\/p>\n","protected":false},"excerpt":{"rendered":"<p>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 &#8220;OP&#8221; stands for &#8220;opponent&#8221;) that has been observed\u00a0targeting Microsoft Internet Information Services (IIS) servers to deploy a bespoke web shell framework. ReliaQuest has assessed with moderate to high confidence that [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[76],"class_list":["post-13417","post","type-post","status-publish","format-standard","hentry","category-thehackersnews","tag-thehackersnews"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/13417"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=13417"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/13417\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=13417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=13417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=13417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}