{"id":92,"date":"2005-07-19T16:43:26","date_gmt":"2005-07-19T22:43:26","guid":{"rendered":"\/?p=92"},"modified":"2006-05-18T10:44:15","modified_gmt":"2006-05-18T17:44:15","slug":"foiling-the-callret-monitor","status":"publish","type":"post","link":"https:\/\/multimedia.cx\/eggs\/foiling-the-callret-monitor\/","title":{"rendered":"Foiling The call\/ret Monitor"},"content":{"rendered":"<p>In the grand tradition of arms races, I like to give equal time to counter-reverse engineering techniques. <a href=\"http:\/\/projecteva.net\">Colin Hill<\/a> suggested an interesting way to cause trouble for <a href=\"http:\/\/multimedia.cx\/eggs\/index.php?p=91\">my call\/ret monitoring solution<\/a>. Make functions that start with a long sequence of NOPs. Instead of calling the actual start address, load the starting address into a register and add a random number to the base address that still points into the NOP range. This would pollute the address space range in the output.<\/p>\n<p>For die-hard, old school reverse engineers, this would also have the effect of creating paranoia of self-modifying code.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to give the call\/ret monitor a hard time&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,4],"tags":[],"class_list":["post-92","post","type-post","status-publish","format-standard","hentry","category-callret-monitor","category-reverse-engineering"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/posts\/92","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/comments?post=92"}],"version-history":[{"count":0,"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/posts\/92\/revisions"}],"wp:attachment":[{"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/media?parent=92"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/categories?post=92"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/multimedia.cx\/eggs\/wp-json\/wp\/v2\/tags?post=92"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}