Adware.JS.REVIZER.AN

September 09, 2020

Analysis by: Kenneth Mcneil Angel

ALIASES:

JS:Adware.Lnkr.A (BITDEFENDER);

PLATFORM:

Windows

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

INFORMATION EXPOSURE:

Threat Type: Adware
Destructiveness: No
Encrypted: No
In the wild: Yes

OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

This Adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It monitors user transactions on certain sites.

It connects to certain websites to send and receive information.

TECHNICAL DETAILS

File Size: 325,440 bytes

File Type: JS

Memory Resident: No

Initial Samples Received Date: 04 Sep 2020

Payload: Connects to URLs/IPs

Arrival Details

This Adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Adware Routine

This Adware connects to the following URL(s) to display ads on the affected system:

https://{BLOCKED}rinamenya.ru/566bbee0f961ad71b54c3c2fd36db053

Information Theft

This Adware monitors user transactions done on the following websites:

amazon.com
amazon.com.mx
amazon.cn
amazon.co.jp
youradexchange.com
websites containing boobking. , booing. , buking. , boocking. , boooking. , bookking. and booing.

Other Details

This Adware connects to the following website to send and receive information:

During launch:
- if http:
- if https:
After the script is loaded:
- if http:
- if https:
Before sending request:
- if http:
- if https:
Request sending:
- http://{BLOCKED}ontry.net/optout/get?jsonp=__mtz_cb_{random number from 0 to 1000000000}&key=1d71065a79cb556b40&t={time in milliseconds}
If response is fail:
- if http:
- if https:
If response is success:
- if http:
- if https:
After script execution:
- if http:
- if https:

It does the following:

Avoids execution in the following domains that contains the following strings:
- musvk
- vkonline.xyz
- vkunblock.com
- dostup-{any combination of letters}.com
- freevideodownloader
- thisadsfor.us
- olam-hamedia.tech
- ok.ru
- google
- www.google
Avoids the following domains:
- aypal.com
- secure.
- .gov
- doubleclick.net
- addthis.com
- twitter.com
- docs.google.com
- drive.google.com
- analytics.google.com
- notifications.google.com
and sends information to the following website(s):
- http://{BLOCKED}ontry.net/metric/?mid=&wid=52190&sid={1 or blank}&tid=7537&rid=URL_IGNOREDOMAIN&t={time in milliseconds}
- https://{BLOCKED}ontry.net/metric/?mid=&wid=52190&sid={1 or blank}&tid=7537&rid=URL_IGNOREDOMAIN&t={time in milliseconds}
Monitors the following elements of a website:
- If "link" is "chrome-webstore-item",send information to:
- If element "div.g" contains the following strings:
- and if "a:not(.cws)" is found,send information to:
If url contains lotterysambadresult.in, it sends information to the following website:
- http://{BLOCKED}ontry.net/metric/?mid=&wid=52190&sid={1 or blank}&tid=7537&rid=URL_BLACKLISTED&custom1={current hostname}&t={time in milliseconds}
- https://{BLOCKED}ontry.net/metric/?mid=&wid=52190&sid={1 or blank}&tid=7537&rid=URL_BLACKLISTED&custom1={current hostname}&t={time in milliseconds}
Checks if current URL ends with the following strings:
- jpg
- png
- jpeg
- gif
- bmp
- doc
- pdf
- xls
- js
- xml
- doc
- docs
- txt
- css
then sends information to the following website(s):
- http://{BLOCKED}ontry.net/metric/?mid=&wid=52190&sid={1 or blank}&tid=7537&rid=URL_STATICFILE&t={time in milliseconds}
- https://{BLOCKED}ontry.net/metric/?mid=&wid=52190&sid={1 or blank}&tid=7537&rid=URL_STATICFILE&t={time in milliseconds}
If the amazon websites are accessed:
- if "/s/" and "/gp/search/" are found in the URL:
If websites with strings "boobking. , booing. , buking. , boocking. , boooking. , bookking. or booing." are accessed:
- Redirects to http://{BLOCKED}s.me/get?key=6ae9f4bd1dc812dc713d61cba871d8e8&out=http%3A%2F%2Fbooking.com&ref=http%3A%2F%2Fgo.com&format=go&uid=rdr52190
Checks if current hostname contains search engine strings:
- google.
- search.yahoo.
- bing.com
- ask.com
- shopping.yahoo
- search.aol.
- wow.com
- when.com
- search.mywebsearch.com
- search.myway.com
- duckduckgo.com
- mysearch.com
- teoma.com
- searchlock.com
- myprivatesearch.com
- searchprivacy.co
- thesmartsearch.net
- infospace
- safefinder.com
- mysearchguardian.com
If youradexchange.com is accessed and if "a/display." string is found in the URL:
- Redirects to http://www.{BLOCKED}exchange.com/a/display.php?r=391769&sub1=pr{parameters}
It gathers the following information:
- Browser user agent
- Browser Major Version
- Browser name using the following browser-related strings:
- CPU information using the following CPU-related strings:
- Device type using the following device-related strings:
- Browser engine using the following strings:
- OS version using the following strings:

SOLUTION

Minimum Scan Engine: 9.850

SSAPI PATTERN File: 2.333.00

SSAPI PATTERN Date: 10 Sep 2020

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

Downloader.JS.TRX.XXJSE9EFF015

Step 2

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 3

Scan your computer with your Trend Micro product to delete files detected as Adware.JS.REVIZER.AN. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:

Did this description help? Tell us how we did.

Adware.JS.REVIZER.AN

OVERVIEW

TECHNICAL DETAILS

SOLUTION

Trend Vision One™ - Proactive Security Starts Here.

Resources

Support

About Trend

Country Headquarters