TSPY_ONLINEG.OIH

May 29, 2013
 Analysis by: Maydalene Edsel Salvador
 ALIASES:

Backdoor:Win32/Wolyx.B (Microsoft), Backdoor.Cimuz (Norton), Troj/Xylow-A (Sophos), Trojan.Win32.Generic.pak!cobra (Sunbelt), W32/BackDoor.AK!tr (Fortinet), Trojan-PWS.Win32.Hangame.cl (Ikarus)

 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 itself after execution.

  TECHNICAL DETAILS

File Size:

262,824 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

14 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\Microsoft Shared\MSInfo\info.dll
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\c_20870.nls
  • %Program Files%\Common Files\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 Profile%\Local Settings\Temp\~{RANDOM_VALUES}

(Note: %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.)

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1001 = "%SystemRoot%\system32\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1002 = "%SystemRoot%\system32\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1003 = "%SystemRoot%\system32\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1004 = "%SystemRoot%\system32\rsvpsp.dll"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\mswsock32
1005 = "%SystemRoot%\system32\rsvpsp.dll"

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

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000001
PackedCatalogItem = "{RANDOM_HEX_VALUES}"

(Note: The default value data of the said registry entry is {RANDOM_HEX_VALUES}.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000002
PackedCatalogItem = "{RANDOM_HEX_VALUES}"

(Note: The default value data of the said registry entry is {RANDOM_HEX_VALUES}.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000003
PackedCatalogItem = "{RANDOM_HEX_VALUES}"

(Note: The default value data of the said registry entry is {RANDOM_HEX_VALUES}.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000004
PackedCatalogItem = "{RANDOM_HEX_VALUES}"

(Note: The default value data of the said registry entry is {RANDOM_HEX_VALUES}.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000005
PackedCatalogItem = "{RANDOM_HEX_VALUES}"

(Note: The default value data of the said registry entry is {RANDOM_HEX_VALUES}.)

Other Details

This Trojan deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

9.918.05

FIRST VSAPI PATTERN DATE:

06 Feb 2012

VSAPI OPR PATTERN File:

9.919.00

VSAPI OPR PATTERN Date:

07 Feb 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

Scan your computer with your Trend Micro product and note files detected as TSPY_ONLINEG.OIH

Step 3

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.  
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\info.dll
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\c_20870.nls
  • %Program Files%\Common Files\c_20870.nls
  • %User Profile%\Local Settings\Temp\~{RANDOM_VALUES}

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\SYSTEM\CurrentControlSet\Services\WinSock2
    • mswsock32

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.

「ZBOT」や「CARBERP」、「GAMARUE」など最近の脅威では、検出を逃れるための新たな手法や、ユーザに気付かれないようにコンピュータへと忍び込む最新の手口を利用しています。2013年の前半は、私たちの予測通り、従来の脅威の再利用が確認されています。

  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000001
    • From: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
      To: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000002
    • From: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
      To: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000003
    • From: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
      To: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000004
    • From: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
      To: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000005
    • From: PackedCatalogItem = "{RANDOM_HEX_VALUES}"
      To: PackedCatalogItem = "{RANDOM_HEX_VALUES}"

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_ONLINEG.OIH. 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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