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TrojanSpy.Win32.NEGASTEAL.DOCHX

January 21, 2020
 ALIASES:

Trojan:Win32/Bluteal!rfn [non_writable_container] (Microsoft); RDN/Generic.dx (McAfee); HEUR:Backdoor.Win32.Androm.gen (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

  TECHNICAL DETAILS

File Size:

533,491 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

21 Jan 2020

Arrival Details

This Trojan Spy 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 Spy creates the following folders:

  • %System Root%\Users
  • %User Temp%\donor\eventID\field
  • %Application Data%\targetboard
  • %User Temp%\donor\eventID
  • %User Temp%\donor\eventID\field\resetkey
  • %Application Data%\targetboard\Version
  • %User Temp%\donor
  • %Application Data%\linkcheck
  • %User Temp%\deleteImage
  • %User Profile%\AppData
  • %Application Data%\linkcheck\salt

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Trojan Spy modifies the following file(s):

  • %Windows%\win.ini

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\WIRE1x (2.5.1)
UninstallString = "0\Uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Ludusdesign.Quadra.Recording\shell\Open\
command
(Default) = "0\Quadra.exe -play %1"

Dropping Routine

This Trojan Spy drops the following files:

  • %Application Data%\linkcheck\salt\SoapSuds.exe
  • %User Temp%\donor\eventID\field\resetkey\col
  • %Application Data%\linkcheck\salt\dhtmlobj.js
  • %User Temp%\deleteImage\DbgUrtMui.dll
  • %Application Data%\linkcheck\salt\libassuan.so.0
  • %User Temp%\deleteImage\footerdialog.ui
  • %User Temp%\donor\eventID\field\resetkey\None.bmp
  • %User Temp%\donor\eventID\field\resetkey\EBCDIC-UK
  • %User Temp%\donor\eventID\field\resetkey\tzselect.8
  • %User Temp%\donor\eventID\field\resetkey\SampDBInstall.exe
  • %User Temp%\deleteImage\model128.xml
  • %User Temp%\deleteImage\mc.exe
  • %User Temp%\donor\eventID\field\resetkey\x-niff.xml
  • %Application Data%\linkcheck\salt\unity-lens-music.mo
  • %User Temp%\donor\eventID\field\resetkey\lisp
  • %User Temp%\donor\eventID\field\resetkey\72.opends60.dll
  • %User Temp%\donor\eventID\field\resetkey\chown.1.gz
  • %User Temp%\donor\eventID\field\resetkey\x-fortran.xml
  • %Application Data%\linkcheck\salt\screenorientationawareness04.gif
  • %User Temp%\Carrageenin
  • %User Temp%\donor\eventID\field\resetkey\pcmoss.h
  • %User Temp%\donor\eventID\field\resetkey\frames.cpython-36.pyc
  • %System Root%\uninstall-pyjtag.exe
  • %User Temp%\donor\eventID\field\resetkey\MakeZipExe.exe
  • %Application Data%\targetboard\Version\$dvvcmasm
  • %Application Data%\linkcheck\salt\org.gnome.calculator.gschema.xml
  • %Application Data%\linkcheck\salt\dipui.dll
  • %User Temp%\donor\eventID\field\resetkey\RedCircle146,8,8.gif
  • %User Temp%\bulwark.dll
  • %User Temp%\donor\eventID\field\resetkey\edbgcl.dll
  • %User Temp%\donor\eventID\field\resetkey\33.11
  • %User Temp%\donor\eventID\field\resetkey\pref-fullscreen.page
  • %User Temp%\donor\eventID\field\resetkey\707.26
  • %User Temp%\donor\eventID\field\resetkey\vjscsvr.exe
  • %User Temp%\donor\eventID\field\resetkey\palmtopnm
  • %User Temp%\donor\eventID\field\resetkey\vshost32.exe
  • %User Temp%\deleteImage\pgoui.dll
  • %User Temp%\donor\eventID\field\resetkey\backdrop-radio-unselected-hover@2.png
  • %Application Data%\linkcheck\salt\mscoreer.dll
  • %User Temp%\deleteImage\objectlist.xml

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

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

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\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\WIRE1x (2.5.1)
    • UninstallString = "0\Uninstall.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Ludusdesign.Quadra.Recording\shell\Open\command
    • (Default) = "0\Quadra.exe -play %1"

Step 3

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %Application Data%\linkcheck\salt\SoapSuds.exe
  • %User Temp%\donor\eventID\field\resetkey\col
  • %Application Data%\linkcheck\salt\dhtmlobj.js
  • %User Temp%\deleteImage\DbgUrtMui.dll
  • %Application Data%\linkcheck\salt\libassuan.so.0
  • %User Temp%\deleteImage\footerdialog.ui
  • %User Temp%\donor\eventID\field\resetkey\None.bmp
  • %User Temp%\donor\eventID\field\resetkey\EBCDIC-UK
  • %User Temp%\donor\eventID\field\resetkey\tzselect.8
  • %User Temp%\donor\eventID\field\resetkey\SampDBInstall.exe
  • %User Temp%\deleteImage\model128.xml
  • %User Temp%\deleteImage\mc.exe
  • %User Temp%\donor\eventID\field\resetkey\x-niff.xml
  • %Application Data%\linkcheck\salt\unity-lens-music.mo
  • %User Temp%\donor\eventID\field\resetkey\lisp
  • %User Temp%\donor\eventID\field\resetkey\72.opends60.dll
  • %User Temp%\donor\eventID\field\resetkey\chown.1.gz
  • %User Temp%\donor\eventID\field\resetkey\x-fortran.xml
  • %Application Data%\linkcheck\salt\screenorientationawareness04.gif
  • %User Temp%\Carrageenin
  • %User Temp%\donor\eventID\field\resetkey\pcmoss.h
  • %User Temp%\donor\eventID\field\resetkey\frames.cpython-36.pyc
  • %System Root%\uninstall-pyjtag.exe
  • %User Temp%\donor\eventID\field\resetkey\MakeZipExe.exe
  • %Application Data%\targetboard\Version\$dvvcmasm
  • %Application Data%\linkcheck\salt\org.gnome.calculator.gschema.xml
  • %Application Data%\linkcheck\salt\dipui.dll
  • %User Temp%\donor\eventID\field\resetkey\RedCircle146,8,8.gif
  • %User Temp%\bulwark.dll
  • %User Temp%\donor\eventID\field\resetkey\edbgcl.dll
  • %User Temp%\donor\eventID\field\resetkey\33.11
  • %User Temp%\donor\eventID\field\resetkey\pref-fullscreen.page
  • %User Temp%\donor\eventID\field\resetkey\707.26
  • %User Temp%\donor\eventID\field\resetkey\vjscsvr.exe
  • %User Temp%\donor\eventID\field\resetkey\palmtopnm
  • %User Temp%\donor\eventID\field\resetkey\vshost32.exe
  • %User Temp%\deleteImage\pgoui.dll
  • %User Temp%\donor\eventID\field\resetkey\backdrop-radio-unselected-hover@2.png
  • %Application Data%\linkcheck\salt\mscoreer.dll
  • %User Temp%\deleteImage\objectlist.xml

Step 4

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.
  • %System Root%\Users
  • %User Temp%\donor\eventID\field
  • %Application Data%\targetboard
  • %User Temp%\donor\eventID
  • %User Temp%\donor\eventID\field\resetkey
  • %Application Data%\targetboard\Version
  • %User Temp%\donor
  • %Application Data%\linkcheck
  • %User Temp%\deleteImage
  • %User Profile%\AppData
  • %Application Data%\linkcheck\salt

Step 5

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.NEGASTEAL.DOCHX. 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:

Step 6

Restore deleted/modified files and/or registry entries from backup

*Note: Only Microsoft-related files/keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

    • %Windows%\win.ini


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