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Trojan.Win32.DROPPR.TIOIBEOV

January 09, 2023
 Analysis by: Jayvee Mark Villaroman
 ALIASES:

Dropped:Trojan.GenericKD.64427241 (BITDEFENDER)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • 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 modifies the affected system's HOSTS files. This prevents users from accessing certain websites.

  TECHNICAL DETAILS

File Size:

1,493,062 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

04 Jan 2023

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:

  • %Program Files% (x86)\CathayFutures_FX\CathayFuturesFXConfig.exe
  • %Program Files% (x86)\CathayFutures_FX\cathayfutures5setup.exe
  • %Program Files% (x86)\CathayFutures_FX\logo tree.ico

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • %Program Files% (x86)\CathayFutures_FX\CathayFuturesFXConfig.exe
  • %Program Files% (x86)\CathayFutures_FX\cathayfutures5setup.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It creates the following folders:

  • %Program Files% (x86)\CathayFutures_FX

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
AppName = "%Program Files% (x86)\CathayFutures_FX\CathayFXConfig.exe"

HOSTS File Modification

This Trojan adds the following strings to the Windows HOSTS file:

  • {BLOCKED}.{BLOCKED}.0.1 www.{BLOCKED}5.com ← blocks connection to the URL

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

18.174.03

FIRST VSAPI PATTERN DATE:

21 Dec 2022

VSAPI OPR PATTERN File:

18.175.00

VSAPI OPR PATTERN Date:

22 Dec 2022

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

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • AppNameReg = "%Program Files% (x86)\{BLOCKED}Futures_FX\{BLOCKED}FXConfig.exe"

Step 4

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.  
  • %Program Files% (x86)\CathayFutures_FX\CathayFuturesFXConfig.exe
  • %Program Files% (x86)\CathayFutures_FX\cathayfutures5setup.exe
  • %Program Files% (x86)\CathayFutures_FX\logo tree.ico

Step 5

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Program Files% (x86)\CathayFutures_FX\

Step 6

Remove these strings added by the malware/grayware/spyware in the HOSTS file

[ Learn More ]
    • {BLOCKED}.{BLOCKED}.0.1 www.{BLOCKED}5.com

Step 7

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.DROPPR.TIOIBEOV. 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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