PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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: 2,076,951 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 20 Mar 2014

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:

  • %User Temp%\is-HDO2P.tmp
  • %User Temp%\is-HS32B.tmp
  • %User Temp%\is-HS32B.tmp\_isetup
  • %Program Files%\Adobe Flash Players 12.0
  • %Program Files%\Adobe Flash Players 12.0\IE
  • %Program Files%\Adobe Flash Players 12.0\IE\x86
  • %Program Files%\Adobe Flash Players 12.0\IE\x64

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

Autostart Technique

This Trojan registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{D0123838-675F-43DC-9D4C-58498D4D84C9}

Other System Modifications

This Trojan adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Google\
Chrome\Extensions\ahnenihgffnpifphegcnihemnejoigeo

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{D0123838-675F-43DC-9D4C-58498D4D84C9}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Ext

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Ext\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}\Version

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}\TypeLib

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Google\
Chrome\Extensions\ahnenihgffnpifphegcnihemnejoigeo
Path = "%Program Files%\Adobe Flash Players 12.0\adobeflashplayer-sk.crx"

HKEY_LOCAL_MACHINE\SOFTWARE\Google\
Chrome\Extensions\ahnenihgffnpifphegcnihemnejoigeo
Version = "12.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
Inno Setup: Setup Version = "5.5.4 (u)"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
Inno Setup: App Path = "%Program Files%\Adobe Flash Players 12.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
InstallLocation = "%Program Files%\Adobe Flash Players 12.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
Inno Setup: Icon Group = "Adobe Flash Players 12.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
Inno Setup: User = "Wilbert"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
Inno Setup: Language = "english"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
DisplayName = "Adobe Flash Players 12.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
UninstallString = "%Program Files%\Adobe Flash Players 12.0\unins000.exe "

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
QuietUninstallString = "%Program Files%\Adobe Flash Players 12.0\unins000.exe /SILENT"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
Publisher = "Adobe Flash Players 12.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1
InstallDate = "20140224"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{D0123838-675F-43DC-9D4C-58498D4D84C9}
NoExplorer = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{D0123838-675F-43DC-9D4C-58498D4D84C9}
Flags = "19"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Ext\CLSID
{D0123838-675F-43DC-9D4C-58498D4D84C9} = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}\TypeLib
Version = "1.0"

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Adobe Flash Players 12.0_is1

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\is-hdo2p.tmp\{malware file name}.tmp
  • %User Temp%\is-HS32B.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Adobe Flash Players 12.0\unins000.dat
  • %Program Files%\Adobe Flash Players 12.0\is-00OQL.tmp
  • %Program Files%\Adobe Flash Players 12.0\is-AOFOE.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x86\is-6ST2L.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x86\is-NLD01.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x86\is-RE761.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x64\is-FT74D.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x64\is-VEVTG.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x64\is-9J117.tmp

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.300

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

Close all opened browser windows

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\Google\Chrome\Extensions
    • ahnenihgffnpifphegcnihemnejoigeo
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Adobe Flash Players 12.0_is1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings
    • {D0123838-675F-43DC-9D4C-58498D4D84C9}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies
    • Ext
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Ext
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {D0123838-675F-43DC-9D4C-58498D4D84C9}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}
    • Version
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {36EE8A25-52C6-4E01-9925-ED02C59F8016}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{36EE8A25-52C6-4E01-9925-ED02C59F8016}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}
    • TypeLib

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\Google\Chrome\Extensions\ahnenihgffnpifphegcnihemnejoigeo
    • Path = "%Program Files%\Adobe Flash Players 12.0\adobeflashplayer-sk.crx"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions\ahnenihgffnpifphegcnihemnejoigeo
    • Version = "12.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • Inno Setup: Setup Version = "5.5.4 (u)"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • Inno Setup: App Path = "%Program Files%\Adobe Flash Players 12.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • InstallLocation = "%Program Files%\Adobe Flash Players 12.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • Inno Setup: Icon Group = "Adobe Flash Players 12.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • Inno Setup: User = "Wilbert"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • Inno Setup: Language = "english"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • DisplayName = "Adobe Flash Players 12.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • UninstallString = "%Program Files%\Adobe Flash Players 12.0\unins000.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • QuietUninstallString = "%Program Files%\Adobe Flash Players 12.0\unins000.exe /SILENT"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • Publisher = "Adobe Flash Players 12.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Adobe Flash Players 12.0_is1
    • InstallDate = "20140224"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{D0123838-675F-43DC-9D4C-58498D4D84C9}
    • NoExplorer = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{D0123838-675F-43DC-9D4C-58498D4D84C9}
    • Flags = "19"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Ext\CLSID
    • {D0123838-675F-43DC-9D4C-58498D4D84C9} = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D0123838-675F-43DC-9D4C-58498D4D84C9}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D01F487-C6A8-4292-8B3E-5F6DF7CC2459}\TypeLib
    • Version = "1.0"

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.
  • %User Temp%\is-hdo2p.tmp\{malware file name}.tmp
  • %User Temp%\is-HS32B.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Adobe Flash Players 12.0\unins000.dat
  • %Program Files%\Adobe Flash Players 12.0\is-00OQL.tmp
  • %Program Files%\Adobe Flash Players 12.0\is-AOFOE.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x86\is-6ST2L.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x86\is-NLD01.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x86\is-RE761.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x64\is-FT74D.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x64\is-VEVTG.tmp
  • %Program Files%\Adobe Flash Players 12.0\IE\x64\is-9J117.tmp

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.
  • %User Temp%\is-HDO2P.tmp
  • %User Temp%\is-HS32B.tmp
  • %User Temp%\is-HS32B.tmp\_isetup
  • %Program Files%\Adobe Flash Players 12.0
  • %Program Files%\Adobe Flash Players 12.0\IE
  • %Program Files%\Adobe Flash Players 12.0\IE\x86
  • %Program Files%\Adobe Flash Players 12.0\IE\x64

Step 7

Scan your computer with your Trend Micro product to delete files detected as TROJ_SPNV.03CG14. 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 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
    • Adobe Flash Players 12.0_is1


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