TSPY_ONLINEG.NFA
Trojan.Win32.Meredrop (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
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 drops the following copies of itself into the affected system:
- %System%\koking.exe
(Note: %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.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
King_ko = "%System%\koking.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\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}
Other System Modifications
This spyware deletes the following files:
- %System%\koking.exe
(Note: %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.)
It adds the following registry keys:
HKEY_CLASSES_ROOT\IEHlprObj.IEHlprObj.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
IEHlprObj.IEHlprObj.1\CLSID
HKEY_CLASSES_ROOT\IEHlprObj.IEHlprObj
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
IEHlprObj.IEHlprObj\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}\TypeLib
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
WBEM\WDM
%System%\advapi32.dll[MofResourceName] = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
WBEM\WDM
%System%\DRIVERS\ACPI.sys[ACPIMOFResource] = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
WBEM\WDM
%System%\DRIVERS\mssmbios.sys[MofResource] = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
WBEM\WDM
%System%\DRIVERS\intelppm.sys[PROCESSORWMI] = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
WBEM\WDM
%System%\DRIVERS\ipnat.sys[IPNATMofResource] = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
WBEM\WDM
%System%\Drivers\HTTP.sys[UlMofResource] = "{random characters}"
Dropping Routine
This spyware drops the following files:
- %System%\koie0.dll
- %System%\koking0.dll
(Note: %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.)
Other Details
This spyware connects to the following possibly malicious URL:
- http://www.{BLOCKED}o.com/1hg/ah1.rar
This report is generated via an automated analysis system.
SOLUTION
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
Close all opened browser windows
Step 4
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_CLASSES_ROOT
- IEHlprObj.IEHlprObj.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1
- CLSID
- In HKEY_CLASSES_ROOT
- IEHlprObj.IEHlprObj
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\IEHlprObj.IEHlprObj
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{20FDDC2B-28D4-4FC4-AC6B-6EBEB9417B64}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}
- TypeLib
Step 5
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- King_ko = "%System%\koking.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{20FDDC64-28D4-4FC4-AC6B-6EBEB9417B64}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{20FDDC65-28D4-4FC4-AC6B-6EBEB9417B64}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WBEM\WDM
- %System%\advapi32.dll[MofResourceName] = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WBEM\WDM
- %System%\DRIVERS\ACPI.sys[ACPIMOFResource] = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WBEM\WDM
- %System%\DRIVERS\mssmbios.sys[MofResource] = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WBEM\WDM
- %System%\DRIVERS\intelppm.sys[PROCESSORWMI] = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WBEM\WDM
- %System%\DRIVERS\ipnat.sys[IPNATMofResource] = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WBEM\WDM
- %System%\Drivers\HTTP.sys[UlMofResource] = "{random characters}"
Step 6
Search and delete these files
- %System%\koie0.dll
- %System%\koking0.dll
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ONLINEG.NFA. 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.
- %System%\koking.exe
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