Trojan.Win64.NUKESPED.YXBB-B

 Analysis by: Thea Patrice Tajonera

 ALIASES:

Trojan:Win32/UnionCryptoTrader (MICROSOFT)

 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:

Downloaded from the Internet, Dropped by other malware


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 may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

14,634,496 bytes

File Type:

Other

Memory Resident:

Yes

Initial Samples Received Date:

19 Feb 2021

Payload:

Displays message/message boxes, Modifies system registry

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.

It may be dropped by the following malware:

Installation

This Trojan adds the following folders:

  • %Program Files%\UnionCryptoTrader
  • %Program Files%\UnionCryptoTrader\platforms
  • %AppDataLocal%\UnionCryptoTrader

(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).. %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).)

It drops the following files:

  • %Program Files%\UnionCryptoTrader\blackbird.dll
  • %Program Files%\UnionCryptoTrader\curl-ca-bundle.crt
  • %Program Data%\regid.2018-06.vip.unioncrypto_{Random Characters}.swidtag
  • %System Root%\Users\All Users\regid.2018-06.vip.unioncrypto_{Random Characters}.swidtag
  • %Program Files%\UnionCryptoTrader\regid.2018-06.vip.unioncrypto_{Random Characters}.swidtag
  • %Program Files%\UnionCryptoTrader\config.txt -> UnionCryptoTrader configuration file
  • %Program Files%\UnionCryptoTrader\UnionCryptoTrader.exe -> detected as Trojan.Win64.APPLEJEUS.YEBB-A
  • %AppDataLocal%\UnionCryptoTrader\UnionCryptoUpdater.exe -> detected as Trojan.Win64.NUKESPED.YXBB-A
  • %Desktop%\UnionCryptoTrader.lnk -> shortcut to UnionCryptoTrader.exe

It drops the following non-malicious files:

  • %Program Files%\UnionCryptoTrader\chartdir60.dll
  • %Program Files%\UnionCryptoTrader\LIBCURL.DLL
  • %Program Files%\UnionCryptoTrader\libeay32.dll
  • %Program Files%\UnionCryptoTrader\Qt5Core.dll
  • %Program Files%\UnionCryptoTrader\Qt5Gui.dll
  • %Program Files%\UnionCryptoTrader\Qt5Widgets.dll
  • %Program Files%\UnionCryptoTrader\sqlite3.dll
  • %Program Files%\UnionCryptoTrader\ssleay32.dll
  • %Program Files%\UnionCryptoTrader\platforms\qwindows.dll
  • %Program Files%\UnionCryptoTrader\platforms\qwindowsd.dll

(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 registers its dropped component as a system service to ensure its automatic execution at every system startup. It does this by creating the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\UnionCryptorUpdater
ImagePath = %AppDataLocal%\UnionCryptoUpdater.exe

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\UnionCryptorUpdater
Description = Automatically installs updates for Union Crypto Trader

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\UnionCryptorUpdater
DisplayName = Union Crypto Trading Updater Service

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\UnionCryptorUpdater
Type = 10

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\UnionCryptorUpdater
Start = 2

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\UnionCryptorUpdater
ErrorControl = 1

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\UnionCryptorUpdater
ObjectName = LocalSystem

Other Details

This Trojan does the following:

  • It displays the following images:

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

16.574.03

FIRST VSAPI PATTERN DATE:

04 Mar 2021

VSAPI OPR PATTERN File:

16.575.00

VSAPI OPR PATTERN Date:

05 Mar 2021

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

Restart in Safe Mode

[ Learn More ]

Step 4

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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater
    • ImagePath = %AppDataLocal%\UnionCryptoUpdater.exe
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater
    • Description = Automatically installs updates for Union Crypto Trader
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater
    • DisplayName = Union Crypto Trading Updater Service
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater
    • Type = 10
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater
    • Start = 2
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater
    • ErrorControl = 1
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater
    • ObjectName = LocalSystem

Step 5

Delete this registry key

[ 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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\UnionCryptorUpdater

Step 6

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%\UnionCryptoTrader\chartdir60.dll
  • %Program Files%\UnionCryptoTrader\LIBCURL.DLL
  • %Program Files%\UnionCryptoTrader\libeay32.dll
  • %Program Files%\UnionCryptoTrader\Qt5Core.dll
  • %Program Files%\UnionCryptoTrader\Qt5Gui.dll
  • %Program Files%\UnionCryptoTrader\Qt5Widgets.dll
  • %Program Files%\UnionCryptoTrader\sqlite3.dll
  • %Program Files%\UnionCryptoTrader\ssleay32.dll
  • %Program Files%\UnionCryptoTrader\platforms\qwindows.dll
  • %Program Files%\UnionCryptoTrader\platforms\qwindowsd.dll
  • %Program Files%\UnionCryptoTrader\blackbird.dll
  • %Program Data%\regid.2018-06.vip.unioncrypto_{Random Characters}.swidtag
  • %System Root%\Users\All Users\regid.2018-06.vip.unioncrypto_{Random Characters}.swidtag
  • %Program Files%\UnionCryptoTrader\regid.2018-06.vip.unioncrypto_{Random Characters}.swidtag
  • %Program Files%\UnionCryptoTrader\config.txt
  • %Program Files%\UnionCryptoTrader\curl-ca-bundle.crt
  • %Program Files%\UnionCryptoTrader\UnionCryptoTrader.exe
  • %AppDataLocal%\UnionCryptoTrader\UnionCryptoUpdater.exe
  • %Desktop%\UnionCryptoTrader.lnk

Step 7

Search and delete this folder

[ 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%\UnionCryptoTrader
  • %Program Files%\UnionCryptoTrader\platforms
  • %AppDataLocal%\UnionCryptoTrader

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.Win64.NUKESPED.YXBB-B. 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 this Knowledge Base page for more information.

Step 9

Remove the malware/grayware file dropped/downloaded by Trojan.Win64.NUKESPED.YXBB-B. (Note: Please skip this step if the threat(s) listed below have already been removed.)


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