Trojan.JS.MANAGEX.A

 Analysis by: John Donnie Celestre
 Modified by: Jemimah Mae Molina

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


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

It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

687,512 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

18 Sep 2019

Arrival Details

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

Installation

This Trojan drops the following files:

  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\images\chromium.svg
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\images\shadow.png
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\background.html
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\background.js → contains malicious script
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\config.json → contains configuration settings
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\manifest.json → contains extension details
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\test.js
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\tr.js

(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Information Theft

This Trojan gathers the following data:

  • OS Version
  • Chrome Details
    • ID
    • Version
    • Language
    • Browser Flavor
  • Location
    • Country
    • IP Address
  • Date and Time

Other Details

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

  • http://taw{BLOCKED}.com/update
  • http://geo.s{BLOCKED}.com/details
  • http://{BLOCKED}.ly/2ry7vC5 → contains privacy policy
  • http://cun{BLOCKED}.com
  • http://cab{BLOCKED}.com
  • https://tr{BLOCKED}.go{BLOCKED}.com/trends/hottrends/hotItems
  • d34{BLOCKED}.cloudfront.net

It does the following:

  • This Chrome extension monitors the browsing activities of a user including all tabs and windows created, whether minimized or maximized, and all the clicks that registered in the Chrome extension widget.
  • It is capable of injecting a script (advia.chopsticks.js).
  • It sets permission to allow access to the following Chrome APIs:
    • Management
    • Background
    • Storage
    • Cookies
    • Tabs
    • webRequest
    • webRequestBlocking
    • unlimitedStorage
    • contextMenus
    • bookmarks
    • webNavigation
    • history
    • topSites
    • activeTab
    • alarms
    • browsingData
    • clipboardRead
    • clipboardWrite
    • contentSettings
    • debugger
    • declarativeContent
    • desktopCapture
    • downloads
    • gcm
    • geolocation
    • identity
    • idle
    • nativeMessaging
    • notifications
    • pageCapture
    • power
    • printerProvider
    • privacy
    • proxy
    • sessions
    • system.cpu
    • system.display
    • system.memory
    • system.storage
    • tabCapture
    These access permissions are allowed to all sites/URLs visited

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.388.04

FIRST VSAPI PATTERN DATE:

24 Sep 2019

VSAPI OPR PATTERN File:

15.389.00

VSAPI OPR PATTERN Date:

25 Sep 2019

Step 1

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 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\images\chromium.svg
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\images\shadow.png
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\background.html
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\background.js
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\config.json
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\manifest.json
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\test.js
  • %AppDataLocal%\Google Chrome\Chromium\User data\Default\Extensions\{Extension Installation Directory}\tr.js

Step 4

Scan your computer with your Trend Micro product to delete files detected as Trojan.JS.MANAGEX.A. 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:


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