TROJ_DLOADER.YMNIP

October 06, 2016
 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:

3,669,857 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

06 Oct 2016

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 creates the following folders:

  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • OnLineRecovery
  • %User Temp%\is-NV56M.tmp
  • %User Temp%\is-34Q9V.tmp
  • %User Temp%\is-34Q9V.tmp\_isetup
  • %Program Files%\Transcend
  • %Program Files%\Transcend\Recovery Tool
  • %Program Files%\Transcend\Recovery Tool\ISO
  • %Program Files%\Transcend\Recovery Tool\code_package
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA
  • %Start Menu%\Programs\Transcend Recovery

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other System Modifications

This Trojan deletes the following files:

  • %Start Menu%\Programs\Transcend Recovery\Recovery.pif
  • %Start Menu%\Programs\Transcend Recovery\Recovery.url
  • %Start Menu%\Programs\Transcend Recovery\Uninstall Transcend Recovery JF200 Tool.pif
  • %Start Menu%\Programs\Transcend Recovery\Uninstall Transcend Recovery JF200 Tool.url

(Note: %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
Inno Setup: Setup Version = "5.3.7 (a)"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
Inno Setup: App Path = "%Program Files%\Transcend\Recovery Tool"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
InstallLocation = "%Program Files%\Transcend\Recovery Tool"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
Inno Setup: Icon Group = "Transcend Recovery"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
Inno Setup: User = "Wilbert"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
DisplayName = "Transcend Recovery V1.17"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
DisplayIcon = "%Program Files%\Transcend\Recovery Tool\MyProg.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
UninstallString = "%Program Files%\Transcend\Recovery Tool\unins000.exe "

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
QuietUninstallString = "%Program Files%\Transcend\Recovery Tool\unins000.exe /SILENT"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1
InstallDate = "20160905"

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Transcend Recovery_is1

Dropping Routine

This Trojan drops the following files:

  • __tmp_rar_sfx_access_check_34406
  • OnLineRecovery\Recovery_200_220_V117.exe
  • %User Temp%\is-NV56M.tmp\Recovery_200_220_V117.tmp
  • %User Temp%\is-34Q9V.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-34Q9V.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Transcend\Recovery Tool\unins000.dat
  • %Program Files%\Transcend\Recovery Tool\is-3EUDR.tmp
  • %Program Files%\Transcend\Recovery Tool\is-BP2PC.tmp
  • %Program Files%\Transcend\Recovery Tool\is-31FCC.tmp
  • %Program Files%\Transcend\Recovery Tool\is-VP89J.tmp
  • %Program Files%\Transcend\Recovery Tool\is-LREIR.tmp
  • %Program Files%\Transcend\Recovery Tool\is-OU6LD.tmp
  • %Program Files%\Transcend\Recovery Tool\is-0V27E.tmp
  • %Program Files%\Transcend\Recovery Tool\is-0G3RU.tmp
  • %Program Files%\Transcend\Recovery Tool\is-97B5M.tmp
  • %Program Files%\Transcend\Recovery Tool\is-2GJ6I.tmp
  • %Program Files%\Transcend\Recovery Tool\is-T0KS7.tmp
  • %Program Files%\Transcend\Recovery Tool\is-CJ4UR.tmp
  • %Program Files%\Transcend\Recovery Tool\ISO\is-JP3R3.tmp
  • %Program Files%\Transcend\Recovery Tool\ISO\is-7TEKJ.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-U7UHF.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-H9NJV.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-1FCRQ.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-DUMB9.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-1QA1S.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-I1A14.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-JB54K.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-1DSQC.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-5VBS9.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-L6QG2.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-DES69.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-307LJ.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-3CO3C.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-P15EG.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-D2O5G.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-RRDKM.tmp
  • %Start Menu%\Programs\Transcend Recovery\Recovery.lnk
  • %Start Menu%\Programs\Transcend Recovery\Uninstall Transcend Recovery JF200 Tool.lnk

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.8

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

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
    • Transcend Recovery_is1

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • Inno Setup: Setup Version = "5.3.7 (a)"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • Inno Setup: App Path = "%Program Files%\Transcend\Recovery Tool"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • InstallLocation = "%Program Files%\Transcend\Recovery Tool"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • Inno Setup: Icon Group = "Transcend Recovery"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • Inno Setup: User = "Wilbert"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • DisplayName = "Transcend Recovery V1.17"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • DisplayIcon = "%Program Files%\Transcend\Recovery Tool\MyProg.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • UninstallString = "%Program Files%\Transcend\Recovery Tool\unins000.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • QuietUninstallString = "%Program Files%\Transcend\Recovery Tool\unins000.exe /SILENT"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Transcend Recovery_is1
    • InstallDate = "20160905"

Step 4

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.
  • __tmp_rar_sfx_access_check_34406
  • OnLineRecovery\Recovery_200_220_V117.exe
  • %User Temp%\is-NV56M.tmp\Recovery_200_220_V117.tmp
  • %User Temp%\is-34Q9V.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-34Q9V.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Transcend\Recovery Tool\unins000.dat
  • %Program Files%\Transcend\Recovery Tool\is-3EUDR.tmp
  • %Program Files%\Transcend\Recovery Tool\is-BP2PC.tmp
  • %Program Files%\Transcend\Recovery Tool\is-31FCC.tmp
  • %Program Files%\Transcend\Recovery Tool\is-VP89J.tmp
  • %Program Files%\Transcend\Recovery Tool\is-LREIR.tmp
  • %Program Files%\Transcend\Recovery Tool\is-OU6LD.tmp
  • %Program Files%\Transcend\Recovery Tool\is-0V27E.tmp
  • %Program Files%\Transcend\Recovery Tool\is-0G3RU.tmp
  • %Program Files%\Transcend\Recovery Tool\is-97B5M.tmp
  • %Program Files%\Transcend\Recovery Tool\is-2GJ6I.tmp
  • %Program Files%\Transcend\Recovery Tool\is-T0KS7.tmp
  • %Program Files%\Transcend\Recovery Tool\is-CJ4UR.tmp
  • %Program Files%\Transcend\Recovery Tool\ISO\is-JP3R3.tmp
  • %Program Files%\Transcend\Recovery Tool\ISO\is-7TEKJ.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-U7UHF.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-H9NJV.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-1FCRQ.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1\is-DUMB9.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-1QA1S.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-I1A14.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-JB54K.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA\is-1DSQC.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-5VBS9.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-L6QG2.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-DES69.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A\is-307LJ.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-3CO3C.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-P15EG.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-D2O5G.tmp
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA\is-RRDKM.tmp
  • %Start Menu%\Programs\Transcend Recovery\Recovery.lnk
  • %Start Menu%\Programs\Transcend Recovery\Uninstall Transcend Recovery JF200 Tool.lnk

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.
  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • OnLineRecovery
  • %User Temp%\is-NV56M.tmp
  • %User Temp%\is-34Q9V.tmp
  • %User Temp%\is-34Q9V.tmp\_isetup
  • %Program Files%\Transcend
  • %Program Files%\Transcend\Recovery Tool
  • %Program Files%\Transcend\Recovery Tool\ISO
  • %Program Files%\Transcend\Recovery Tool\code_package
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\INTEL\JS29F32G08AAME1
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON
  • %Program Files%\Transcend\Recovery Tool\code_package\4K256PAGE\MICRON\29F32G08CBACA
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG
  • %Program Files%\Transcend\Recovery Tool\code_package\8K128PAGE\SAMSUNG\K9GBG08U0A
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON
  • %Program Files%\Transcend\Recovery Tool\code_package\8K256PAGE\MICRON\ATMMU209C0BGAA
  • %Start Menu%\Programs\Transcend Recovery

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADER.YMNIP. 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 7

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.

  • %Start Menu%\Programs\Transcend Recovery\Recovery.pif
  • %Start Menu%\Programs\Transcend Recovery\Recovery.url
  • %Start Menu%\Programs\Transcend Recovery\Uninstall Transcend Recovery JF200 Tool.pif
  • %Start Menu%\Programs\Transcend Recovery\Uninstall Transcend Recovery JF200 Tool.url

Step 8

Restore these deleted registry keys/values from backup

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

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Transcend Recovery_is1


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