{"id":7374,"date":"2017-10-10T12:44:46","date_gmt":"2017-10-10T10:44:46","guid":{"rendered":"https:\/\/hansesecure.de\/2017\/10\/slae-assignment-6-polymorphing-shellcodes\/"},"modified":"2017-10-10T12:44:46","modified_gmt":"2017-10-10T10:44:46","slug":"slae-assignment-6-polymorphing-shellcodes","status":"publish","type":"post","link":"https:\/\/hansesecure.de\/en\/2017\/10\/slae-assignment-6-polymorphing-shellcodes\/","title":{"rendered":"SLAE Assignment #6 | Polymorphing Shellcodes"},"content":{"rendered":"

This task (pick up 3 shellcodes from Shell-Storm and use polymorphism to beat pattern matching) sounds really sophisticated but you will see it’s a very handy way for AV evasion for your shellcode. Check my github<\/a> account for the files.<\/p>\n

We have to pick three random shellcodes from shell-storm<\/a>.<\/p>\n

    \n
  1. \/bin\/sh<\/li>\n
  2. \/bin\/sh -c “ping localhost”<\/li>\n
  3. chmod 0777 \/etc\/shadow<\/li>\n<\/ol>\n

    Shell<\/h3>\n

    Source<\/a><\/p>\n

    Just changed 0x68732f2f (“hs\/\/”) & 0x6e69622f(“nib\/”) into <\/span>0x68732f6e<\/span> (“hs\/n<\/span>“)& <\/span>0x69622f2f<\/span> (“ib\/\/<\/span>“) \ud83d\ude09<\/span><\/p>\n\n\n\n\n
    original code<\/strong><\/td>\nmorphed code<\/strong><\/td>\n<\/tr>\n
    \"\"<\/a><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Ping localhost<\/h3>\n

    Source<\/a><\/p>\n

    Adding some slashes.<\/p>\n\n\n\n\n
    original code<\/strong><\/td>\nmorphed code<\/strong><\/td>\n<\/tr>\n
    \"\"<\/a><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Chmod shadow<\/h3>\n

    Source<\/a><\/p>\n

    Little math to hide the well known hexcode for “adow” \ud83d\ude1b<\/p>\n\n\n\n\n
    original code<\/strong><\/td>\nmorphed code<\/strong><\/td>\n<\/tr>\n
    \"\"<\/a><\/td>\n\"\"<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Playing around with registers and thinking creatively was very funny.<\/p>\n

     <\/p>\n

    This blog post has been created for completing the requirements of the SecurityTube Linux Assembly Expert certification:
    \n    http:\/\/securitytube-training.com\/online-courses\/securitytube-linux-assembly-expert\/<\/a><\/p>\n

    Student ID: SLAE-1036<\/p>\n","protected":false},"excerpt":{"rendered":"

    This task (pick up 3 shellcodes from Shell-Storm and use polymorphism to beat pattern matching) sounds really sophisticated but you will see it’s a very handy way for AV evasion for your shellcode. Check my github account for the files. We have to pick three random shellcodes from shell-storm. \/bin\/sh \/bin\/sh -c “ping localhost” chmod […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[257],"tags":[269,270,266,274,271],"class_list":["post-7374","post","type-post","status-publish","format-standard","hentry","category-deep-dive-techniques","tag-assembler-en","tag-linux-en-2","tag-migration-en","tag-shellcode-en","tag-slae-en-2"],"acf":[],"yoast_head":"\nSLAE Assignment #6 | Polymorphing Shellcodes – HanseSecure GmbH<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hansesecure.de\/en\/2017\/10\/slae-assignment-6-polymorphing-shellcodes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SLAE Assignment #6 | Polymorphing Shellcodes – HanseSecure GmbH\" \/>\n<meta property=\"og:description\" content=\"This task (pick up 3 shellcodes from Shell-Storm and use polymorphism to beat pattern matching) sounds really sophisticated but you will see it’s a very handy way for AV evasion for your shellcode. Check my github account for the files. We have to pick three random shellcodes from shell-storm. \/bin\/sh \/bin\/sh -c “ping localhost” chmod […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hansesecure.de\/en\/2017\/10\/slae-assignment-6-polymorphing-shellcodes\/\" \/>\n<meta property=\"og:site_name\" content=\"HanseSecure GmbH\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/facebook.com\/hansesecure\" \/>\n<meta property=\"article:published_time\" content=\"2017-10-10T10:44:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hansesecure.de\/wp-banane\/uploads\/2017\/10\/slae_6_shell.jpg\" \/>\n<meta name=\"author\" content=\"HanseSecure\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@CyberWarship\" \/>\n<meta name=\"twitter:site\" content=\"@CyberWarship\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"HanseSecure\" \/>\n\t<meta name=\"twitter:label2\" 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