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Tag Archives | clamav

Malware Scanner Tools for Linux

We all know that Linux is the most powerful operating system around us, but there is a misconception that Linux does not need any antivirus programs on it. For maximum protection this is essential. More than 60% of web-servers are running on Linux servers and most of them are protected with some solutions. From my […]

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Decode signatures with Sigtool

When you are scanning malware example ClamAV or Maldet from files in server and get positive hit, you may difficult find where has injected code in the file. For decoding signature you can use ClamAV sigtool command line tool. This will help you find the right position from infected file and remove malware code. Positive […]

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scan FTP uploaded files on cPanel Servers with ClamAV

First we need install ClamAV, it has been now been included in cPanel/WHM. ClamAV is a free and open-source, cross-platform antivirus software tool-kit able to detect many types of malicious software, including viruses. One of its main uses is on mail servers as a server-side email virus scanner. You can also install it from your […]

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Pure-FTPd with ClamAV at Directadmin Custombuild

This tutorial we integrate ClamAV into Pure-FTPd for virus scanning in Directadmin server with Custombuild. Whenever a file gets uploaded through Pure-FTPd, ClamAV will check the file and delete it if it is malware. Installing Pure-FTPd & ClamAV First we need change custom build options.conf setting Check options.conf #ClamAV-related Settings clamav=yes pureftpd_uploadscan=yes Building software Building […]

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WordPress Hidden Include

Today we found undetected malware, which keep it hidden and try loading again if it deleted. We generated Signatures to Detect these hidden includes: /index.php: {HEX}Malware.Expert.wordpress.hidden.include.0.UNOFFICIAL FOUND /wp-load.php: {HEX}Malware.Expert.wordpress.hidden.include.1.UNOFFICIAL FOUND /wp-includes/template.php: {HEX}Malware.Expert.malware.url.7od.info.0.UNOFFICIAL FOUND /wp-includes/Requests/IPconfig.ini: {HEX}Malware.Expert.generic.malware.39.UNOFFICIAL FOUND /wp-includes/js/utilities.js: {HEX}Malware.Expert.generic.malware.39.UNOFFICIAL FOUND WordPress index.php wp-load.php End of file: template.php IPconfig.ini Remove file utilities.js Remove file Final Words Use […]

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Cryptonight

This again new malware which we call cryptonight, what we haven’t seen before. It’s downloads executable Linux program and hides that http daemon in background, which is difficult find process list at first glance. Manual remove process You can search if there running process httpd, which start cryptonight parameter: ps aux | grep cryptonight Then […]

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Phoenix WebShell

New web shell (PHOENIX SHELL), what we have not seen this this before. This is typical webshell, except there are a lot of extra features: Upload Command Execute Mass Deface cPanel crack CGI Telnet WordPress auto Deface Fake root Etc … In the action Final words Use Malware Expert – Signatures detect this Web shell […]

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What is a Web shell?

A web shell or backdoor shell is a script written in the supported language of a target web server to be uploaded to enable remote access and administration of the machine. Shells are able to infect servers that may not necessary be internet-facing, servers for hosting of internal resources are also subject to web shell […]

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WordPress hidden cookie (wp_cookie)

We found very old and hidden WordPress cookie, which named wp_cookie. This allows an attacker to run anything on the compromised user website with user permissions. wp_cookie This is a very clever attack method that allows arbitrary commands to run on a server with ignoring any server security software, just like normal PHP code. Also, […]

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CowoKerensTeam File Manager

The malware is a PHP File Manager – a script, which when installed on a compromised system, presents a sophisticated administration platform allowing the attacker to browse the filesystem of the compromised server, upload, create, edit, download or delete files. CowoKerensTeam File Manager Today we found new PHP webshell, what we have not seen before […]

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