Nofawkx hack: WSO PHP shell uploaded through (very) old tiny_mce

Written by - 0 comments

Published on - Listed in Hacks Internet BSD

Funny. Right after I posted the previous article (Uploaded and executed perl script through old Joomla vulnerability), I was informed about a hacked customer website on a FreeBSD web server and was asked for help to find out how this happened.

The customer's website didn't really look like a real website anymore. The hackers enjoyed to design their own little welcome page (and even embedded some background sound through a Youtube embed code):

hacked by nofawkx

A quick look into the htdocs folder revealed a recent hack:

ls -ltr
total 21
-rw-rw-r--   1 useraccount  useraccount  3033 Nov 27 11:34 index.php
drwxrwxr-x   4 useraccount  useraccount     8 Feb  8 01:08 userfiles
-rw-r--r--   1 useraccount  useraccount  8079 Feb  8 01:09 al.htm

So February 8th in the early mornings... By going through the access logs from that day, I quickly found the source IP ( which was responsible for the hack.

The following POST on a tiny_mce script allowed the hacker to do an upload: - - [08/Feb/2014:01:08:45 +0100] "POST /bcms/jscripts/tiny_mce/plugins/smexplorer/index.php?get=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&action=upload HTTP/1.1" 200 30572 "" "Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0"

Through that POST, a new file (wso.2.5.1.php) was uploaded. As I've seen a lot of hacks in the past years, I already knew that this will be a WSO PHP Shell.
Optical verification:

wso web shell

Right after the upload of the web shell, it was executed several times: - - [08/Feb/2014:01:08:49 +0100] "GET /userfiles/wso2.5.1.php HTTP/1.1" 200 13929 "" "Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0" - - [08/Feb/2014:01:08:51 +0100] "POST /userfiles/wso2.5.1.php HTTP/1.1" 200 14966 "" "Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0" - - [08/Feb/2014:01:08:56 +0100] "POST /userfiles/wso2.5.1.php HTTP/1.1" 200 14966 "" "Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0" - - [08/Feb/2014:01:09:07 +0100] "POST /userfiles/wso2.5.1.php HTTP/1.1" 200 15593 "" "Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0"

The website's index.php was overwritten a few days later as stat revealed:

stat index.php
4230937973 41 -rw-rw-r-- 1 useraccount useraccount 4294967295 3033 "Feb 10 10:47:42 2014" "Nov 27 11:34:33 2013" "Feb  9 21:10:45 2014" "Feb  9 21:10:45 2014" 7168 5 0 index.php

Without big surprise it was once again the wso script which caused this change: - - [09/Feb/2014:21:10:45 +0100] "POST /userfiles/wso2.5.1.php HTTP/1.1" 200 12342 "" "Mozilla/5.0 (Windows NT 6.1; rv:27.0) Gecko/20100101 Firefox/27.0"

One of the uploaded files from the hacker was called "al.htm" and contained a video with a message from the hacker.
The message was basically, that the website had "0 security". 
Let's verify if the hacker was right by checking the version of the abused tiny_mce script:

more bcms/jscripts/tiny_mce/tiny_mce.js
var tinymce={majorVersion:'3',minorVersion:'0.6.2',releaseDate:'2008-04-07'

A tiny_mce script from 2008. Why am I not surprised?

Add a comment

Show form to leave a comment

Comments (newest first)

No comments yet.

RSS feed

Blog Tags:

  AWS   Android   Ansible   Apache   Apple   Atlassian   BSD   Backup   Bash   Bluecoat   CMS   Chef   Cloud   Coding   Consul   Containers   CouchDB   DB   DNS   Database   Databases   Docker   ELK   Elasticsearch   Filebeat   FreeBSD   Galera   Git   GlusterFS   Grafana   Graphics   HAProxy   HTML   Hacks   Hardware   Icinga   Icingaweb   Icingaweb2   Influx   Internet   Java   KVM   Kibana   Kodi   Kubernetes   LVM   LXC   Linux   Logstash   Mac   Macintosh   Mail   MariaDB   Minio   MongoDB   Monitoring   Multimedia   MySQL   NFS   Nagios   Network   Nginx   OSSEC   OTRS   Office   PGSQL   PHP   Perl   Personal   PostgreSQL   Postgres   PowerDNS   Proxmox   Proxy   Python   Rancher   Rant   Redis   Roundcube   SSL   Samba   Seafile   Security   Shell   SmartOS   Solaris   Surveillance   Systemd   TLS   Tomcat   Ubuntu   Unix   VMWare   VMware   Varnish   Virtualization   Windows   Wireless   Wordpress   Wyse   ZFS   Zoneminder   

Update cookies preferences