ALIASES:

Trojan:Win32/Occamy.C [non_writable_container] (Microsoft); RDN/Generic.fxt (McAfee); Trojan.Win32.Makoob.ac (Kaspersky); Troj/Fareit-IYK (Sophos); Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows

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

  • 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.

  TECHNICAL DETAILS

File Size: 232,709 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 10 Nov 2019

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 adds the following processes:

  • %System%\lsass.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It creates the following folders:

  • %Application Data%\channelName\missingtrackvolume
  • %Application Data%\channelName\missingtrackvolume\struct
  • %Application Data%\position\advanced\children\savemode
  • %User Profile%\AppData
  • %Application Data%\position\advanced\children
  • %Application Data%\position\advanced
  • %User Temp%\pl
  • %Application Data%\position
  • %System Root%\Users
  • %User Temp%\pl\rule
  • %Application Data%\737FF7
  • %User Temp%\pl\rule\inline
  • %Start Menu%\Programs\$ICONS_GROUP
  • %Application Data%\channelName

(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 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).. %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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Trojan deletes the following files:

  • %Windows%\SysWOW64\cmd.exe

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

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
TotalCommanderSFTP

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\TotalCommanderSFTP
UninstallString = "%User Temp%\pl\rule\inline\sftp_plugin\tc_sftp_uninstaller.exe"

Dropping Routine

This Trojan drops the following files:

  • %Application Data%\channelName\missingtrackvolume\struct\SystemDeploymentFrameworkService.exe
  • %User Temp%\pl\rule\inline\dvVSETCD01N.HxK
  • %Start Menu%\Programs\$ICONS_GROUP\Asymptote.lnk
  • %Application Data%\737FF7\73A3E3.lck
  • %Application Data%\channelName\missingtrackvolume\struct\lcdefinename.png
  • %Start Menu%\Programs\WIRE1x 2.5.1\Read me.lnk
  • %Application Data%\737FF7\73A3E3.exe
  • %User Temp%\pl\rule\inline\NotificationBox.css
  • %Application Data%\channelName\missingtrackvolume\struct\MFC80KOR.dll
  • %Application Data%\position\advanced\children\savemode\event-utils.js
  • %Application Data%\channelName\missingtrackvolume\struct\insertcellsbar.xml
  • %Application Data%\channelName\missingtrackvolume\struct\org.freedesktop.Avahi.HostNameResolver.xml
  • %Application Data%\channelName\missingtrackvolume\struct\vsmsvr.exe
  • %User Temp%\pl\rule\inline\vjscsvrps.dll

(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).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}aremall.ga/~zadmin/lmark/aps/link.php

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

Identify and terminate files detected as Trojan.Win32.TIGGRE.USXVPIO19

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

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\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • TotalCommanderSFTP

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\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\TotalCommanderSFTP
    • UninstallString = "%User Temp%\pl\rule\inline\sftp_plugin\tc_sftp_uninstaller.exe"

Step 5

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%\channelName\missingtrackvolume\struct\SystemDeploymentFrameworkService.exe
  • %User Temp%\pl\rule\inline\dvVSETCD01N.HxK
  • %Start Menu%\Programs\$ICONS_GROUP\Asymptote.lnk
  • %Application Data%\737FF7\73A3E3.lck
  • %Application Data%\channelName\missingtrackvolume\struct\lcdefinename.png
  • %Start Menu%\Programs\WIRE1x 2.5.1\Read me.lnk
  • %Application Data%\737FF7\73A3E3.exe
  • %User Temp%\pl\rule\inline\NotificationBox.css
  • %Application Data%\channelName\missingtrackvolume\struct\MFC80KOR.dll
  • %Application Data%\position\advanced\children\savemode\event-utils.js
  • %Application Data%\channelName\missingtrackvolume\struct\insertcellsbar.xml
  • %Application Data%\channelName\missingtrackvolume\struct\org.freedesktop.Avahi.HostNameResolver.xml
  • %Application Data%\channelName\missingtrackvolume\struct\vsmsvr.exe
  • %User Temp%\pl\rule\inline\vjscsvrps.dll

Step 6

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.
  • %Application Data%\channelName\missingtrackvolume
  • %Application Data%\channelName\missingtrackvolume\struct
  • %Application Data%\position\advanced\children\savemode
  • %User Profile%\AppData
  • %Application Data%\position\advanced\children
  • %Application Data%\position\advanced
  • %User Temp%\pl
  • %Application Data%\position
  • %System Root%\Users
  • %User Temp%\pl\rule
  • %Application Data%\737FF7
  • %User Temp%\pl\rule\inline
  • %Start Menu%\Programs\$ICONS_GROUP
  • %Application Data%\channelName

Step 7

Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.TIGGRE.USXVPIO19. 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 8

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %Windows%\SysWOW64\cmd.exe


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