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TROJ_DOWNLOADER_0000768.TOMA

May 16, 2013
 ALIASES:

Trojan:Win32/FakePlayer.B, Trojan:WinNT/Goriadu.gen!A, TrojanClicker:Win32/Agent.FB!dll, Trojan:Win3 (Microsoft); [6.nsis]:Generic Malware.f!pec, [17.nsis\3.nsis]:Bohu.dll, [17.nsis\8.nsis]:Generic.dx!b2vg, [17.nsi (McAfee); Downloader (Symantec); ARC:NSIS, [$INSTDIR\GameZone.exe]:Trojan-Downloader.Win32.Agent.dsfq, ARC:[$INSTDIR\uninst.exe]:NSIS (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Trojan.Generic.4173784 (FSecure)

 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:

1,919,776 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

19 Oct 2012

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
  • %User Temp%\nsu2.tmp
  • %User Temp%\nsz5.tmp
  • %Program Files%\baidu
  • %User Temp%\nso9.tmp
  • %System%\microinfo
  • %System%\microinfo\MyIEData
  • %Windows%\LastGood
  • %Windows%\LastGood\INF
  • %User Profile%\Application Data\MyIEData

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

Autostart Technique

This Trojan registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinSock2\speednet_sph

Other System Modifications

This Trojan modifies the following file(s):

  • %User Profile%\Application Data\Microsoft

(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.)

It deletes the following files:

  • %User Temp%\nsf1.tmp
  • %User Temp%\nsu2.tmp
  • %User Temp%\nsu2.tmp\ns3.tmp
  • %User Temp%\nsu2.tmp\ns6.tmp
  • %User Temp%\nsu2.tmp\ns7.tmp
  • %User Temp%\nsj4.tmp
  • %User Temp%\nsz5.tmp
  • %User Temp%\nst8.tmp
  • %User Temp%\nso9.tmp
  • %System%\DRIVERS\SETE.tmp
  • %System%\DRIVERS\lendot.dll
  • %System%\DRIVERS\SETF.tmp
  • %System%\DRIVERS\lendot.sys

(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.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\gameplayer

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NetHomeIDE\Parameters

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network\NetCfgLockHolder

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Control\Network\{4d36e974-e325-11ce-bfc1-08002be10318}\
{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051}\InProcServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0\
HELPDIR

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\speednet_sph
1001 = "%SystemRoot%\system32\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\speednet_sph
1002 = "%SystemRoot%\system32\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\speednet_sph
1003 = "%SystemRoot%\system32\mswsock.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\speednet_sph
1004 = "%SystemRoot%\system32\rsvpsp.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\speednet_sph
1005 = "%SystemRoot%\system32\rsvpsp.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\speednet_sph
PathName = "%System%\microinfo\microinfo.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
mysysgroup3 = "NetHomeIDE"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NetHomeIDE\Parameters
ServiceDll = "%System%\nethome32.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NetHomeIDE
Description = "NetHomeIDE Audit Service."

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\
{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
Characteristics = "4418"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\
{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
InfPath = "%Windows%\inf\oem12.inf"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\
{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
InfSection = "netsflt.ndi"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\
{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
Description = "lendot Driver"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\
{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
ComponentId = "ms_lendot"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051}\InProcServer32
ThreadingModel = "Both"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\
{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
InfPath = "oem12.inf"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000001
PackedCatalogItem = "{random values}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000002
PackedCatalogItem = "{random values}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000003
PackedCatalogItem = "{random values}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000004
PackedCatalogItem = "{random values}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\WinSock2\Parameters\
Protocol_Catalog9\Catalog_Entries\000000000005
PackedCatalogItem = "{random values}"

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Setup
PrivateHash = "{random values}"

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Driver Signing
Policy = "{random values}"

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Non-Driver Signing
Policy = "{random values}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Network
Config = "{random values}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NdisWan\Linkage
Bind = "{random characters}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NdisWan\Linkage
Route = "{random characters}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\NdisWan\Linkage
Export = "{random characters}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0008
NetCfgInstanceId = "{CA2DC9DA-D586-4464-91E8-EF8932205E21}"

(Note: The default value data of the said registry entry is {8347DFC0-2E88-4957-B577-F094C14F659F}.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0008\Linkage
RootDevice = "NdisWanIp"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0008\Linkage
UpperBind = "Tcpip"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0008\Linkage
Export = "\Device\NdisWanIp"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0001
NetCfgInstanceId = "{706C9A23-9058-4780-9179-0EE8467AACB4}"

(Note: The default value data of the said registry entry is {865B16A3-D78E-483F-8D7B-8DF6BB83FF7F}.)

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0001\Linkage
RootDevice = "{706C9A23-9058-4780-9179-0EE8467AACB4}"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0001\Linkage
UpperBind = "Ndisuio,RasPppoe,Tcpip"

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

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\
0001\Linkage
Export = "\Device\{706C9A23-9058-4780-9179-0EE8467AACB4}"

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

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\nsu2.tmp\loading.exe
  • %User Temp%\nsu2.tmp\System.dll
  • %User Temp%\nsu2.tmp\Math.dll
  • %User Temp%\nsu2.tmp\nsExec.dll
  • %User Temp%\nsu2.tmp\nsRandom.dll
  • %User Temp%\nsu2.tmp\AccessControl.dll
  • %User Temp%\nsu2.tmp\devcon.exe
  • %User Temp%\nsu2.tmp\install.exe
  • %User Temp%\nsz5.tmp\NxSMSILoaderDlg.dll
  • %Program Files%\baidu\lendot.dll
  • %Program Files%\baidu\dsetup.exe
  • %Program Files%\baidu\lendot.sys
  • %Program Files%\baidu\mpflt_m.inf
  • %Program Files%\baidu\mpflt.inf
  • %Program Files%\baidu\newnetgar.dll
  • %Program Files%\baidu\spass.dll
  • %Program Files%\baidu\SysDat.bin
  • %Program Files%\baidu\RandWr.exe
  • %User Temp%\nso9.tmp\System.dll
  • %Program Files%\baidu\uninst13.exe
  • %User Profile%\Microsoft\Crypto
  • %User Profile%\Crypto\RSA
  • %User Profile%\RSA\S-1-5-21-1645522239-1292428093-682003330-1003
  • %Windows%\INF\oem11.PNF
  • %Windows%\INF\oem12.PNF
  • %Windows%\inf\INFCACHE.0
  • %User Temp%\nsu2.tmp\ns3.tmp
  • %User Temp%\nsu2.tmp\ns6.tmp
  • %User Temp%\nsu2.tmp\ns7.tmp
  • %Windows%\INF\oem11.inf
  • %Windows%\INF\oem12.inf
  • %System%\DRIVERS\SETE.tmp
  • %System%\DRIVERS\SETF.tmp
  • %System%\drivers\lendot.sys

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

9.300

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

Restart in Safe Mode

[ Learn More ]

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\SYSTEM\CurrentControlSet\Services\WinSock2
    • speednet_sph
  • In HKEY_LOCAL_MACHINE\Software
    • gameplayer
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetHomeIDE
    • Parameters
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network
    • NetCfgLockHolder
  • In HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Network\{4d36e974-e325-11ce-bfc1-08002be10318}
    • {5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {df2e4f67-e93a-11d1-bb14-0000f8779051}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051}
    • InProcServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {38135D11-E93B-11D1-BB14-0000F8779051}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{38135D11-E93B-11D1-BB14-0000F8779051}\1.0
    • HELPDIR

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\ControlSet001\Services\WinSock2\speednet_sph
    • 1001 = "%SystemRoot%\system32\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\speednet_sph
    • 1002 = "%SystemRoot%\system32\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\speednet_sph
    • 1003 = "%SystemRoot%\system32\mswsock.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\speednet_sph
    • 1004 = "%SystemRoot%\system32\rsvpsp.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\speednet_sph
    • 1005 = "%SystemRoot%\system32\rsvpsp.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\speednet_sph
    • PathName = "%System%\microinfo\microinfo.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
    • mysysgroup3 = "NetHomeIDE"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetHomeIDE\Parameters
    • ServiceDll = "%System%\nethome32.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NetHomeIDE
    • Description = "NetHomeIDE Audit Service."
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
    • Characteristics = "4418"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
    • InfPath = "%Windows%\inf\oem12.inf"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
    • InfSection = "netsflt.ndi"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
    • Description = "lendot Driver"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
    • ComponentId = "ms_lendot"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{df2e4f67-e93a-11d1-bb14-0000f8779051}\InProcServer32
    • ThreadingModel = "Both"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network\{4D36E974-E325-11CE-BFC1-08002BE10318}\{5B3697F6-4E77-4148-9174-BCC5B9B11E4C}
    • InfPath = "oem12.inf"

Step 5

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000001
    • From: PackedCatalogItem = "{random values}"
      To: PackedCatalogItem = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000002
    • From: PackedCatalogItem = "{random values}"
      To: PackedCatalogItem = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000003
    • From: PackedCatalogItem = "{random values}"
      To: PackedCatalogItem = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000004
    • From: PackedCatalogItem = "{random values}"
      To: PackedCatalogItem = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000005
    • From: PackedCatalogItem = "{random values}"
      To: PackedCatalogItem = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup
    • From: PrivateHash = "{random values}"
      To: PrivateHash = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Driver Signing
    • From: Policy = "{random values}"
      To: Policy = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Non-Driver Signing
    • From: Policy = "{random values}"
      To: Policy = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Network
    • From: Config = "{random values}"
      To: Config = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NdisWan\Linkage
    • From: Bind = "{random characters}"
      To: Bind = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NdisWan\Linkage
    • From: Route = "{random characters}"
      To: Route = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\NdisWan\Linkage
    • From: Export = "{random characters}"
      To: Export = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0008
    • From: NetCfgInstanceId = "{CA2DC9DA-D586-4464-91E8-EF8932205E21}"
      To: NetCfgInstanceId = ""{8347DFC0-2E88-4957-B577-F094C14F659F}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0008\Linkage
    • From: RootDevice = "NdisWanIp"
      To: RootDevice = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0008\Linkage
    • From: UpperBind = "Tcpip"
      To: UpperBind = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0008\Linkage
    • From: Export = "\Device\NdisWanIp"
      To: Export = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0001
    • From: NetCfgInstanceId = "{706C9A23-9058-4780-9179-0EE8467AACB4}"
      To: NetCfgInstanceId = ""{865B16A3-D78E-483F-8D7B-8DF6BB83FF7F}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0001\Linkage
    • From: RootDevice = "{706C9A23-9058-4780-9179-0EE8467AACB4}"
      To: RootDevice = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0001\Linkage
    • From: UpperBind = "Ndisuio,RasPppoe,Tcpip"
      To: UpperBind = ""{random values}""
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\0001\Linkage
    • From: Export = "\Device\{706C9A23-9058-4780-9179-0EE8467AACB4}"
      To: Export = ""{random values}""

Step 6

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%\nsu2.tmp\loading.exe
  • %User Temp%\nsu2.tmp\System.dll
  • %User Temp%\nsu2.tmp\Math.dll
  • %User Temp%\nsu2.tmp\nsExec.dll
  • %User Temp%\nsu2.tmp\nsRandom.dll
  • %User Temp%\nsu2.tmp\AccessControl.dll
  • %User Temp%\nsu2.tmp\devcon.exe
  • %User Temp%\nsu2.tmp\install.exe
  • %User Temp%\nsz5.tmp\NxSMSILoaderDlg.dll
  • %Program Files%\baidu\lendot.dll
  • %Program Files%\baidu\dsetup.exe
  • %Program Files%\baidu\lendot.sys
  • %Program Files%\baidu\mpflt_m.inf
  • %Program Files%\baidu\mpflt.inf
  • %Program Files%\baidu\newnetgar.dll
  • %Program Files%\baidu\spass.dll
  • %Program Files%\baidu\SysDat.bin
  • %Program Files%\baidu\RandWr.exe
  • %User Temp%\nso9.tmp\System.dll
  • %Program Files%\baidu\uninst13.exe
  • %User Profile%\Microsoft\Crypto
  • %User Profile%\Crypto\RSA
  • %User Profile%\RSA\S-1-5-21-1645522239-1292428093-682003330-1003
  • %Windows%\INF\oem11.PNF
  • %Windows%\INF\oem12.PNF
  • %Windows%\inf\INFCACHE.0
  • %User Temp%\nsu2.tmp\ns3.tmp
  • %User Temp%\nsu2.tmp\ns6.tmp
  • %User Temp%\nsu2.tmp\ns7.tmp
  • %Windows%\INF\oem11.inf
  • %Windows%\INF\oem12.inf
  • %System%\DRIVERS\SETE.tmp
  • %System%\DRIVERS\SETF.tmp
  • %System%\drivers\lendot.sys

Step 7

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
  • %User Temp%\nsu2.tmp
  • %User Temp%\nsz5.tmp
  • %Program Files%\baidu
  • %User Temp%\nso9.tmp
  • %System%\microinfo
  • %System%\microinfo\MyIEData
  • %Windows%\LastGood
  • %Windows%\LastGood\INF
  • %User Profile%\Application Data\MyIEData

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DOWNLOADER_0000768.TOMA. 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 9

Restore deleted/modified files and/or registry entries from backup

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

    • %User Profile%\Application Data\Microsoft

Step 10

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.

  • %User Temp%\nsf1.tmp
  • %User Temp%\nsu2.tmp
  • %User Temp%\nsu2.tmp\ns3.tmp
  • %User Temp%\nsu2.tmp\ns6.tmp
  • %User Temp%\nsu2.tmp\ns7.tmp
  • %User Temp%\nsj4.tmp
  • %User Temp%\nsz5.tmp
  • %User Temp%\nst8.tmp
  • %User Temp%\nso9.tmp
  • %System%\DRIVERS\SETE.tmp
  • %System%\DRIVERS\lendot.dll
  • %System%\DRIVERS\SETF.tmp
  • %System%\DRIVERS\lendot.sys


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