{"id":49718,"date":"2022-01-07T16:12:34","date_gmt":"2022-01-07T16:12:34","guid":{"rendered":"https:\/\/merikebi.warrenmyers.com\/?p=49718"},"modified":"2022-01-07T16:12:34","modified_gmt":"2022-01-07T16:12:34","slug":"answer-by-warren-for-please-help-me-improve-this-log4j-regex-to-pulls-out-possible-malicious-sources","status":"publish","type":"post","link":"https:\/\/merikebi.warrenmyers.com\/?p=49718","title":{"rendered":"Answer by warren for Please help me improve this Log4J Regex to pulls out possible Malicious Sources"},"content":{"rendered":"<p>Based on the samples you provided, this <a href=\"https:\/\/regex101.com\/r\/4Hyfon\/1\" rel=\"nofollow noreferrer\">regex<\/a> <em>seems<\/em> to match what you&#8217;re looking for:<\/p>\n<pre><code>([\\$]|[\\%24]){1,3}(?&lt;suspicious_log4j&gt;([\\{]|[\\%7B]{1,3}).*[jJnNdDiI]{1,4}.+[lLdDaApPsS]{1,5}.+([\\\/|\\%2F]).+)\n<\/code><\/pre>\n<p>Check out Regex101&#8217;s &quot;EXPLANATION&quot; box for what it&#8217;s doing<\/p>\n<p>But it returns 8 matches in 686 steps<\/p>\n<p>from User warren &#8211; Stack Overflow https:\/\/stackoverflow.com\/questions\/70613366\/please-help-me-improve-this-log4j-regex-to-pulls-out-possible-malicious-sources\/70624021#70624021<br \/>\nvia <a href=\"https:\/\/ifttt.com\/?ref=da&#038;site=wordpress\">IFTTT<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Based on the samples you provided, this regex seems to match what you&#8217;re looking for: ([\\$]|[\\%24]){1,3}(?&lt;suspicious_log4j&gt;([\\{]|[\\%7B]{1,3}).*[jJnNdDiI]{1,4}.+[lLdDaApPsS]{1,5}.+([\\\/|\\%2F]).+) Check out Regex101&#8217;s &quot;EXPLANATION&quot; box for what it&#8217;s doing But it returns 8 matches in 686 steps from User warren &#8211; Stack Overflow https:\/\/stackoverflow.com\/questions\/70613366\/please-help-me-improve-this-log4j-regex-to-pulls-out-possible-malicious-sources\/70624021#70624021 via IFTTT<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[991],"keyring_services":[],"class_list":["post-49718","post","type-post","status-publish","format-standard","hentry","category-blih","tag-stackexchange"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=\/wp\/v2\/posts\/49718","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=49718"}],"version-history":[{"count":1,"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=\/wp\/v2\/posts\/49718\/revisions"}],"predecessor-version":[{"id":49719,"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=\/wp\/v2\/posts\/49718\/revisions\/49719"}],"wp:attachment":[{"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=49718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=49718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=49718"},{"taxonomy":"keyring_services","embeddable":true,"href":"https:\/\/merikebi.warrenmyers.com\/index.php?rest_route=%2Fwp%2Fv2%2Fkeyring_services&post=49718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}