TROJ_DAEKOM.CD
Trojan:Win32/Delf.EP (Microsoft); [002422e0.EXE]:BackDoor-AWQ.b!dri, [001808e0.EXE]:Generic.dx!iqy, [000baee0.EXE]:Generic.dx!iqy (McAfee); Downloader (Symantec); Backdoor.Win32.Hupigon.jelc (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse BackDoor.Hupigon5.ARUY.dropper (AVG)
Windows 2000, Windows XP, Windows Server 2003
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
988,160 bytes
EXE
Yes
23 Jun 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 copies of itself into the affected system:
- %Windows%\WinSxS\5462725V.exe
- %Program Files%\Microsoft.NET\9993577J.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows.. %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).)
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\KTdNWg\Parameters
Other System Modifications
This Trojan modifies the following file(s):
- %Start Menu%\Programs\Internet Explorer.lnk
- %Start Menu%\Programs\Windows Media Player.lnk
- %Start Menu%\Programs\Accessories\Entertainment\Windows Media Player.lnk
(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)
It deletes the following files:
- %Windows%\Microsoft.NET\NETFXRepair.3082~.dll
- %Windows%\Driver Cache\7590656I.dll
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Directory\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Drive\shell\open\
command
HKEY_CLASSES_ROOT\CLSID\{75EA2845-EAD5-486E-A339-59FED49289A6}
HKEY_CLASSES_ROOT\CLSID\{75EA2845-EAD5-486E-A339-59FED49289A6}\
InprocServer32
HKEY_CLASSES_ROOT\PROTOCOLS\Filter\
text/html
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}\TypeLib
HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}
HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}\
InprocServer32
HKEY_CLASSES_ROOT\OffCalc.OffCalcExt
HKEY_CLASSES_ROOT\OffCalc.OffCalcExt\Clsid
HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}\
ProgID
HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}\
Version
HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}\
TypeLib
HKEY_CURRENT_USER\Software\Microsoft\
Office\Outlook\Addins\
OffCalc.OffCalcExt
HKEY_CURRENT_USER\Software\Microsoft\
Office\Excel\Addins\
OffCalc.OffCalcExt
HKEY_CURRENT_USER\Software\Microsoft\
Office\Word\Addins\
OffCalc.OffCalcExt
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost\
VfPyJScLU
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{75EA2845-EAD5-486E-A339-59FED49289A6}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
PROTOCOLS\Filter\text/html
CLSID = "{75EA2845-EAD5-486E-A339-59FED49289A6}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}\InprocServer32
ThreadingModel = "Apartment"
HKEY_CURRENT_USER\Software\Microsoft\
Office\Outlook\Addins\
OffCalc.OffCalcExt
FriendlyName = "UIwMbRGV"
HKEY_CURRENT_USER\Software\Microsoft\
Office\Outlook\Addins\
OffCalc.OffCalcExt
LoadBehavior = "3"
HKEY_CURRENT_USER\Software\Microsoft\
Office\Excel\Addins\
OffCalc.OffCalcExt
FriendlyName = "JTePaK"
HKEY_CURRENT_USER\Software\Microsoft\
Office\Excel\Addins\
OffCalc.OffCalcExt
LoadBehavior = "3"
HKEY_CURRENT_USER\Software\Microsoft\
Office\Word\Addins\
OffCalc.OffCalcExt
FriendlyName = "XgRbLVgPz"
HKEY_CURRENT_USER\Software\Microsoft\
Office\Word\Addins\
OffCalc.OffCalcExt
LoadBehavior = "3"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
VfPyJScLU = "KTdNWg"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost\
VfPyJScLU
CoInitializeSecurityParam = "1"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\KTdNWg
Description = "ΪÓû§ÌṩʹÓÃÖ÷Ìâ¹ÜÀíµÄ¾Ñé¡£"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\KTdNWg\Parameters
ServiceDll = "%Windows%\Driver Cache\7590656I.dll"
Dropping Routine
This Trojan drops the following files:
- %System%\HHDJe6cTg.exe
- %Windows%\Microsoft.NET\NETFXRepair.3082~.dll.tmp
- %Windows%\AppPatch\msimain~.dll.tmp
- %Windows%\Driver Cache\7590656I.dll.tmp
- %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnk
- %Windows%\DelA.bat
- \WINDOWS\system32\config\systemprofile\Start Menu\Programs\Windows Media Player.lnk
- \WINDOWS\system32\config\systemprofile\Start Menu\Programs\Accessories\Entertainment\Windows Media Player.lnk
- %Program Files%\Internet Explorer\JUetzI.exe
- %Program Files%\Windows Media Player\RtNWgQa.exe
- %Program Files%\Windows Media Player\NtJTeOx.exe
- %Program Files%\Internet Explorer\tRbLV.exe
- %Program Files%\Windows Media Player\QtMVePy.exe
- %Program Files%\Windows Media Player\aLtdNVeNWf.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %Windows% is the Windows folder, which is usually C:\Windows.. %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.. %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).)
Other Details
This Trojan deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
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
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\KTdNWg
- Parameters
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Directory\shell\open
- command
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Drive\shell\open
- command
- In HKEY_CLASSES_ROOT\CLSID
- {75EA2845-EAD5-486E-A339-59FED49289A6}
- In HKEY_CLASSES_ROOT\CLSID\{75EA2845-EAD5-486E-A339-59FED49289A6}
- InprocServer32
- In HKEY_CLASSES_ROOT\PROTOCOLS\Filter
- text/html
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {9B74BBC9-9516-4C06-9A9B-4594386F429D}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{9B74BBC9-9516-4C06-9A9B-4594386F429D}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {3C563030-29AA-496A-85F9-2A91F3A7D203}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}
- TypeLib
- In HKEY_CLASSES_ROOT\CLSID
- {C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}
- In HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}
- InprocServer32
- In HKEY_CLASSES_ROOT
- OffCalc.OffCalcExt
- In HKEY_CLASSES_ROOT\OffCalc.OffCalcExt
- Clsid
- In HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}
- ProgID
- In HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}
- Version
- In HKEY_CLASSES_ROOT\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}
- TypeLib
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins
- OffCalc.OffCalcExt
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins
- OffCalc.OffCalcExt
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Word\Addins
- OffCalc.OffCalcExt
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
- VfPyJScLU
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\Classes\CLSID\{75EA2845-EAD5-486E-A339-59FED49289A6}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\PROTOCOLS\Filter\text/html
- CLSID = "{75EA2845-EAD5-486E-A339-59FED49289A6}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{3C563030-29AA-496A-85F9-2A91F3A7D203}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{C80F2C34-B4A7-4F23-A99E-D55DB29DC30D}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\OffCalc.OffCalcExt
- FriendlyName = "UIwMbRGV"
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\OffCalc.OffCalcExt
- LoadBehavior = "3"
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins\OffCalc.OffCalcExt
- FriendlyName = "JTePaK"
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins\OffCalc.OffCalcExt
- LoadBehavior = "3"
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Word\Addins\OffCalc.OffCalcExt
- FriendlyName = "XgRbLVgPz"
- In HKEY_CURRENT_USER\Software\Microsoft\Office\Word\Addins\OffCalc.OffCalcExt
- LoadBehavior = "3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
- VfPyJScLU = "KTdNWg"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost\VfPyJScLU
- CoInitializeSecurityParam = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\KTdNWg
- Description = "ΪÓû§ÌṩʹÓÃÖ÷Ìâ¹ÜÀíµÄ¾Ñé¡£"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\KTdNWg\Parameters
- ServiceDll = "%Windows%\Driver Cache\7590656I.dll"
Step 5
Search and delete these components
- %System%\HHDJe6cTg.exe
- %Windows%\Microsoft.NET\NETFXRepair.3082~.dll.tmp
- %Windows%\AppPatch\msimain~.dll.tmp
- %Windows%\Driver Cache\7590656I.dll.tmp
- %User Profile%\Quick Launch\Launch Internet Explorer Browser.lnk
- %Windows%\DelA.bat
- \WINDOWS\system32\config\systemprofile\Start Menu\Programs\Windows Media Player.lnk
- \WINDOWS\system32\config\systemprofile\Start Menu\Programs\Accessories\Entertainment\Windows Media Player.lnk
- %Program Files%\Internet Explorer\JUetzI.exe
- %Program Files%\Windows Media Player\RtNWgQa.exe
- %Program Files%\Windows Media Player\NtJTeOx.exe
- %Program Files%\Internet Explorer\tRbLV.exe
- %Program Files%\Windows Media Player\QtMVePy.exe
- %Program Files%\Windows Media Player\aLtdNVeNWf.exe
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DAEKOM.CD. 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 7
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.
- %Start Menu%\Programs\Internet Explorer.lnk
- %Start Menu%\Programs\Windows Media Player.lnk
- %Start Menu%\Programs\Accessories\Entertainment\Windows Media Player.lnk
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%\Microsoft.NET\NETFXRepair.3082~.dll
- %Windows%\Driver Cache\7590656I.dll
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