TROJ_AGENT.LTG
Trojan.Win32.Generic!BT (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
93,816 bytes
EXE
Yes
30 Apr 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:
- %Program Files%\WW2010CF
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
SMRLogin = "%Program Files%\WW2010CF\hulogin.exe"
It 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\Win-Win
Other System Modifications
This Trojan deletes the following files:
- %Windows%\inf\ntfsf.sys
- %Windows%\inf\ntfsf.inf
- %Windows%\inf\ntfsf.PNF
- %System%\Drivers\ntfsf.sys
- %System Root%\temp\winet\ws2_32.dll
- %System Root%\temp\winet\ws2help.dll
- %System Root%\temp\winet\comctl32.dll
- %Start Menu%\WiNet.lnk
- %Program Files%\WW2010CF\rsensor.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\SMR\
Win-Win32
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\App Paths\
huwwin.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
WiNet Client
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
DisplayName = "Win-Win Commander"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
ErrorControl = "0"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
GUID = "f3556418-eb1c-4853-8871-8d1192c7087a"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
ImagePath = "%Program Files%\WW2010CF\SERVICES.EXE"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
InvenPort = "0405"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
LaunchMode = "System"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
License = "180270007700003001900006400360000140337220455"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
SensorUpdateVersion = "6.11.0725.01"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
SerialNumber = "121-5154653-TW9710"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
Type = "11"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Win-Win
Version = "6.11.0725.01"
HKEY_LOCAL_MACHINE\SOFTWARE\SMR\
Win-Win32
InstallPath = "%Program Files%\WW2010CF\huwwin.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\App Paths\
huwwin.exe
Path = "%Program Files%\WW2010CF"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WiNet Client
DisplayVersion = "6.11.0725.01"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WiNet Client
UninstallString = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WiNet Client
Winet = "WiNet Client"
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\system\currentcontrolset\
control\safeboot\Minimal\
win-win\Service
HKEY_LOCAL_MACHINE\system\currentcontrolset\
control\safeboot\Network\
win-win\Service
HKEY_LOCAL_MACHINE\system\currentcontrolset\
Control\SafeBoot\Minimal\
ntfsf.sys
HKEY_LOCAL_MACHINE\system\currentcontrolset\
Control\SafeBoot\Network\
ntfsf.sys
HKEY_LOCAL_MACHINE\system\currentcontrolset\
services\ntfsf\Security
HKEY_LOCAL_MACHINE\system\currentcontrolset\
services\ntfsf\Enum
HKEY_LOCAL_MACHINE\system\currentcontrolset\
services\ntfsf
Dropping Routine
This Trojan drops the following files:
- %Program Files%\WW2010CFLinkFileCreate.txt
- %System%\NMSAccessU.exe
- %System%\rsensor.exe
- %System%\pcinfo.exe
- %System%\cpuz.sys
- %System%\XceedCry.dll
- %System%\NMSDVDXU.dll
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restart in Safe Mode
Step 3
Delete this registry key
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
- Win-Win
- In HKEY_LOCAL_MACHINE\Software\SMR
- Win-Win32
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\App Paths
- huwwin.exe
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
- WiNet Client
Step 4
Delete this registry value
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
- SMRLogin = "%Program Files%\WW2010CF\hulogin.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- DisplayName = "Win-Win Commander"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- ErrorControl = "0"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- GUID = "f3556418-eb1c-4853-8871-8d1192c7087a"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- ImagePath = "%Program Files%\WW2010CF\SERVICES.EXE"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- InvenPort = "0405"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- LaunchMode = "System"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- License = "180270007700003001900006400360000140337220455"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- SensorUpdateVersion = "6.11.0725.01"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- SerialNumber = "121-5154653-TW9710"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- Type = "11"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Win-Win
- Version = "6.11.0725.01"
- In HKEY_LOCAL_MACHINE\SOFTWARE\SMR\Win-Win32
- InstallPath = "%Program Files%\WW2010CF\huwwin.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\huwwin.exe
- Path = "%Program Files%\WW2010CF"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WiNet Client
- DisplayVersion = "6.11.0725.01"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WiNet Client
- UninstallString = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WiNet Client
- Winet = "WiNet Client"
Step 5
Search and delete these files
- %Program Files%\WW2010CFLinkFileCreate.txt
- %System%\NMSAccessU.exe
- %System%\rsensor.exe
- %System%\pcinfo.exe
- %System%\cpuz.sys
- %System%\XceedCry.dll
- %System%\NMSDVDXU.dll
Step 6
Search and delete this folder
- %Program Files%\WW2010CF
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_AGENT.LTG. 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 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.
- %Windows%\inf\ntfsf.sys
- %Windows%\inf\ntfsf.inf
- %Windows%\inf\ntfsf.PNF
- %System%\Drivers\ntfsf.sys
- %System Root%\temp\winet\ws2_32.dll
- %System Root%\temp\winet\ws2help.dll
- %System Root%\temp\winet\comctl32.dll
- %Start Menu%\WiNet.lnk
- %Program Files%\WW2010CF\rsensor.exe
Step 9
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_LOCAL_MACHINE\system\currentcontrolset\control\safeboot\Minimal\win-win
- Service
- In HKEY_LOCAL_MACHINE\system\currentcontrolset\control\safeboot\Network\win-win
- Service
- In HKEY_LOCAL_MACHINE\system\currentcontrolset\Control\SafeBoot\Minimal
- ntfsf.sys
- In HKEY_LOCAL_MACHINE\system\currentcontrolset\Control\SafeBoot\Network
- ntfsf.sys
- In HKEY_LOCAL_MACHINE\system\currentcontrolset\services\ntfsf
- Security
- In HKEY_LOCAL_MACHINE\system\currentcontrolset\services\ntfsf
- Enum
- In HKEY_LOCAL_MACHINE\system\currentcontrolset\services
- ntfsf
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