ALIASES:

Backdoor:Win32/Poison.gen!A (Microsoft); :RapSFX packed app, [00047840.EXE]:BackDoor-DKI.gen, [00002840.EXE]:Generic PWS.di (McAfee); Trojan-Dropper.MSIL.Agent.jo (Kaspersky); Trojan-Dropper.Win32.Delf.afm (v) (Sunbelt); Trojan.Dropper.Delf.AIN (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This spyware 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: 596,992 bytes
File Type: EXE
Initial Samples Received Date: 30 Sep 2011

Arrival Details

This spyware 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 spyware creates the following folders:

  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\ADMINI~1
  • %User Profile%\LOCALS~1
  • %User Temp%\RarSFX0

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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 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.)

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
009 = "%System%\009.exe"

It 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\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}

Other System Modifications

This spyware deletes the following files:

  • %User Temp%\RarSFX0\apps.dat
  • %User Temp%\RarSFX0\pk.bin
  • %User Temp%\RarSFX0\009.exe
  • %User Temp%\RarSFX0\009hk.dll
  • %User Temp%\RarSFX0\mc.dat
  • %User Temp%\RarSFX0\kw.dat
  • %User Temp%\RarSFX0\titles.dat
  • %User Temp%\RarSFX0\009wb.dll
  • %User Temp%\RarSFX0\inst.dat
  • %User Temp%\RarSFX0\rinst.exe

(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.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Active Setup\Installed Components\{3B22C9C0-99B0-AC70-0207-020705010708}

HKEY_CLASSES_ROOT\PK.IE.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PK.IE.1\CLSID

HKEY_CLASSES_ROOT\PK.IE

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PK.IE\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PK.IE\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}\TypeLib

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{3B22C9C0-99B0-AC70-0207-020705010708}
StubPath = "%System%\sdfsd.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}\TypeLib
Version = "1.0"

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Active Setup\Installed Components\{3B22C9C0-99B0-AC70-0207-020705010708}

Dropping Routine

This spyware drops the following files:

  • %User Temp%\NET.EXE
  • %User Temp%\PIGOC.EXE
  • %User Temp%\INST_HINH.EXE
  • pk.bin
  • inst.dat
  • 009hk.dll
  • 009wb.dll
  • 009.exe
  • rinst.exe
  • hinh.jpg
  • %System%\pk.bin
  • %System%\009.exe
  • %System%\009hk.dll
  • %System%\009wb.dll
  • %System%\inst.dat
  • %System%\rinst.exe
  • %System%\sdfsd.exe

(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.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

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

Restart in Safe Mode

[ Learn More ]

Step 3

Close all opened browser windows

Step 4

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\Active Setup\Installed Components
    • {3B22C9C0-99B0-AC70-0207-020705010708}
  • In HKEY_CLASSES_ROOT
    • PK.IE.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PK.IE.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • PK.IE
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PK.IE
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PK.IE
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
    • Browser Helper Objects
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {1E1B286C-88FF-11D3-8D96-D7ACAC95951A}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {1E1B2878-88FF-11D3-8D96-D7ACAC95951A}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}
    • ProxyStubClsid32

      To delete the registry key this malware/grayware created:

      1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
      2. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>Software>Microsoft>Active Setup>Installed Components
      3. Still in the left panel, locate and delete the key:
        {3B22C9C0-99B0-AC70-0207-020705010708}
      4. In the left panel, double-click the following:
        HKEY_CLASSES_ROOT
      5. Still in the left panel, locate and delete the key:
        PK.IE.1
      6. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>PK.IE.1
      7. Still in the left panel, locate and delete the key:
        CLSID
      8. Again Still in the left panel, locate and delete the key:
        PK.IE
      9. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>PK.IE
      10. Still in the left panel, locate and delete the key:
        CLSID
      11. Again Still in the left panel, locate and delete the key:
        CurVer
      12. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID
      13. Still in the left panel, locate and delete the key:
        {1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
      14. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}
      15. Still in the left panel, locate and delete the key:
        ProgID
      16. Again Still in the left panel, locate and delete the key:
        VersionIndependentProgID
      17. Again Still in the left panel, locate and delete the key:
        Programmable
      18. Again Still in the left panel, locate and delete the key:
        InprocServer32
      19. Again Still in the left panel, locate and delete the key:
        TypeLib
      20. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Explorer
      21. Still in the left panel, locate and delete the key:
        Browser Helper Objects
      22. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>TypeLib
      23. Still in the left panel, locate and delete the key:
        {1E1B286C-88FF-11D3-8D96-D7ACAC95951A}
      24. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>TypeLib>{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}
      25. Still in the left panel, locate and delete the key:
        1.0
      26. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>TypeLib>{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}>1.0
      27. Still in the left panel, locate and delete the key:
        FLAGS
      28. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>TypeLib>{1E1B286C-88FF-11D3-8D96-D7ACAC95951A}>1.0>0
      29. Still in the left panel, locate and delete the key:
        win32
      30. Again Still in the left panel, locate and delete the key:
        HELPDIR
      31. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>Interface
      32. Still in the left panel, locate and delete the key:
        {1E1B2878-88FF-11D3-8D96-D7ACAC95951A}
      33. In the left panel, double-click the following:
        HKEY_LOCAL_MACHINE>SOFTWARE>Classes>Interface>{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}
      34. Still in the left panel, locate and delete the key:
        ProxyStubClsid
      35. Again Still in the left panel, locate and delete the key:
        ProxyStubClsid32
      36. Again Still in the left panel, locate and delete the key:
        TypeLib
      37. Close Registry Editor.

Step 5

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\Run
    • 009="%System%\009.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{3B22C9C0-99B0-AC70-0207-020705010708}
    • StubPath="%System%\sdfsd.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{1E1B2879-88FF-11D3-8D96-D7ACAC95951A}\InprocServer32
    • ThreadingModel="Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1E1B2878-88FF-11D3-8D96-D7ACAC95951A}\TypeLib
    • Version="1.0"

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.
  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\ADMINI~1
  • %User Profile%\LOCALS~1
  • %User Temp%\RarSFX0

Step 7

Search and delete these files

[ Learn More ]
There may be some component 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.
  • %User Temp%\NET.EXE
  • %User Temp%\PIGOC.EXE
  • %User Temp%\INST_HINH.EXE
  • pk.bin
  • inst.dat
  • 009hk.dll
  • 009wb.dll
  • 009.exe
  • rinst.exe
  • hinh.jpg
  • %System%\pk.bin
  • %System%\009.exe
  • %System%\009hk.dll
  • %System%\009wb.dll
  • %System%\inst.dat
  • %System%\rinst.exe
  • %System%\sdfsd.exe

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_SPATET.SMT. 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.


Did this description help? Tell us how we did.