TSPY_ONLINEG.OII

 Modified by: Merianne Polintan

 ALIASES:

Backdoor:Win32/Wolyx.B (Microsoft), Backdoor.Cimuz (Norton), Troj/Xylow-A (Sophos), W32/HANGAME.AK!tr (Fortinet), Trojan-PWS.Win32.Hangame.cl (Ikarus), a variant of Win32/Delf.OFO trojan (NOD32)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • 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.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

262,824 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 May 2013

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 drops the following files:

  • %Program Files%\Common Files\EMinfo.dll
  • %Program Files%\Common Files\c_20870.nls
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\c_20870.nls

(Note: %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).)

It drops the following copies of itself into the affected system:

  • %User Temp%\~{Random Value}

(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.)

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentContrloSet\
Services\WinSock2\mswsock32
1001 = "%System%\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1002 = "%System%\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1003 = "%System%\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1004 = "%System%\rsvpsp.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1005 = "%System%\rsvpsp.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
PathName = "%Program Files%\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000001
PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"

(Note: The default value data of the said registry entry is "%SystemRoot%\system32\mswsock.dll".)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000002
PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"

(Note: The default value data of the said registry entry is "%SystemRoot%\system32\mswsock.dll".)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000003
PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"

(Note: The default value data of the said registry entry is "%SystemRoot%\system32\mswsock.dll".)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000004
PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"

(Note: The default value data of the said registry entry is "%SystemRoot%\system32\rsvpsp.dll".)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000005
PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"

(Note: The default value data of the said registry entry is "%SystemRoot%\system32\rsvpsp.dll".)

Other Details

This Trojan deletes the initially executed copy of itself

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.918.05

FIRST VSAPI PATTERN DATE:

13 Jun 2012

VSAPI OPR PATTERN File:

9.919.00

VSAPI OPR PATTERN Date:

14 Jun 2012

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

Search and delete this file

[ Learn More ]
There may be some 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.  
  • %Program Files%\Common Files\EMinfo.dll
  • %Program Files%\Common Files\c_20870.nls
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\c_20870.nls

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\SYSTEM\CurrentContrloSet\Services\WinSock2\mswsock32
    • 1001 = "%System%\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\mswsock32
    • 1002 = "%System%\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\mswsock32
    • 1003 = "%System%\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\mswsock32
    • 1004 = "%System%\rsvpsp.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\mswsock32
    • 1005 = "%System%\rsvpsp.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\mswsock32
    • PathName = "%Program Files%\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"

Step 5

Restore this modified 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\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000001
    • From: PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"
      To: PackedCatalogItem = "%SystemRoot%\system32\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000002
    • From: PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"
      To: PackedCatalogItem = "%SystemRoot%\system32\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000003
    • From: PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"
      To: PackedCatalogItem = "%SystemRoot%\system32\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000004
    • From: PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"
      To: PackedCatalogItem = "%SystemRoot%\system32\rsvpsp.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000005
    • From: PackedCatalogItem = "%Program Files\Common Files\Microsoft Shared\MSINFO\EMinfo.dll"
      To: PackedCatalogItem = "%SystemRoot%\system32\rsvpsp.dll"

Step 6

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


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