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Trojan.JS.XLOADER.AA

May 29, 2020
 Analysis by: Paul Steven Nadera
 ALIASES:

Trojan:JS/CoinHive.A (Microsoft)

 PLATFORM:

Windows, Android, IOS

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


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 does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

It redirects browsers to certain sites.

  TECHNICAL DETAILS

File Size:

13,110 bytes

File Type:

HTML, HTM

Memory Resident:

No

Initial Samples Received Date:

03 May 2020

Payload:

Displays message/message boxes

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.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Rootkit Capabilities

This Trojan does not have rootkit capabilities.

Information Theft

This Trojan does not have any information-stealing capability.

Other Details

This Trojan redirects browsers to the following sites:

  • If browser language starts with "ja11111111":
    • http://www.{BLOCKED}omo-urt.com
  • If it is running on IOS:
    • If browser language starts with "ko":
      • http://security2.{BLOCKED}e.com
    • If browser language starts with "ja":
      • http://security1.{BLOCKED}e.com
    • If browser language starts with "zh-tw":
      • http://security.{BLOCKED}e.com
    • If browser language starts with "en":
      • http://security1.{BLOCKED}e.com
    • If browser language starts with "bg":
      • http://security1.{BLOCKED}e.com
  • If it is running on Android:
    • http://{current hostname}/chrome{number}.{number}.{number}.apk where {number} is a random number from 1-10

It does not exploit any vulnerability.

NOTES:

It does the following:

  • It displays the following fake alerts in different languages depending on the browser language before redirecting to another website:
    • If running on Android:
    • If running on IOS:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.878.04

FIRST VSAPI PATTERN DATE:

19 May 2020

VSAPI OPR PATTERN File:

15.879.00

VSAPI OPR PATTERN Date:

20 May 2020

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

Scan your computer with your Trend Micro product to delete files detected as Trojan.JS.XLOADER.AA. 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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