TROJ_AGENT_014687.TOMB
Trojan.Gen (Symantec); Trojan.Win32.Qhost.abnr (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.7342072 (FSecure)
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
4,235,264 bytes
EXE
No
26 Jul 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 drops the following copies of itself into the affected system:
- %System Root%\b3b73ad67IHWF.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
Autostart Technique
This Trojan 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\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
Other System Modifications
This Trojan deletes the following files:
- b3b73ad67IHWF.exe
- %Windows%\fonts\msgothic.ttf
- %Windows%\fonts\msuigoth.ttf
- %Windows%\fonts\MSMINCHO.TTF
- %Windows%\fonts\Gulim.ttf
- %Windows%\fonts\Gulimche.ttf
- %Windows%\fonts\Dotum.ttf
- %Windows%\fonts\Batang.ttf
- %Windows%\fonts\Gungsuh.ttf
- %Windows%\fonts\Simsun.ttf
- %Windows%\fonts\nsimsun.ttf
- %Windows%\fonts\MingLiU.ttf
- %Windows%\fonts\pmingliu.ttf
- %System%\SET2.tmp
- %System%\kbd101b.dll
- %System%\SET4.tmp
- %System%\kbd101c.dll
- %System%\SET6.tmp
- %System%\kbd103.dll
- %System%\SET8.tmp
- %System%\kbd106.dll
- %System%\SETA.tmp
- %System%\kbdjpn.dll
- %System%\SETC.tmp
- %System%\kbdkor.dll
(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.)
It adds the following registry keys:
HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}\
InprocServer32
HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}\
ProgID
HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}\
Programmable
HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}\
TypeLib
HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}\
VersionIndependentProgID
HKEY_CLASSES_ROOT\IEHlprObj
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
IEHlprObj
CLSID = "{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
IEHlprObj
CurVer = "IEHlprObj"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Enable = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Size = "a"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
InitHits = "64"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International\CpMRU
Factor = "14"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International
W2KLpk = "1"
HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\International
W2KLpk = "0"
Dropping Routine
This Trojan drops the following files:
- %System%\drivers\YHVCOPZT\hosts
- %User Profile%\Templates\QHLDG.dll
- %System%\SET1.tmp
- %System%\SET3.tmp
- %System%\SET5.tmp
- %System%\SET7.tmp
- %System%\SET9.tmp
- %System%\SETB.tmp
- %System%\SET2.tmp
- %System%\SET4.tmp
- %System%\SET6.tmp
- %System%\SET8.tmp
- %System%\SETA.tmp
- %System%\SETC.tmp
(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.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, 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
Close all opened browser windows
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_CLASSES_ROOT\CLSID
- {C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
- In HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
- InprocServer32
- In HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
- ProgID
- In HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
- Programmable
- In HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
- TypeLib
- In HKEY_CLASSES_ROOT\CLSID\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}
- VersionIndependentProgID
- In HKEY_CLASSES_ROOT
- IEHlprObj
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
- CpMRU
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\{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\IEHlprObj
- CLSID = "{C9D10BA4-F50E-453c-8438-DDBCEB4576D6}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\IEHlprObj
- CurVer = "IEHlprObj"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
- Enable = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
- Size = "a"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
- InitHits = "64"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\CpMRU
- Factor = "14"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
- W2KLpk = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International
- W2KLpk = "0"
Step 5
Search and delete these files
- %System%\drivers\YHVCOPZT\hosts
- %User Profile%\Templates\QHLDG.dll
- %System%\SET1.tmp
- %System%\SET3.tmp
- %System%\SET5.tmp
- %System%\SET7.tmp
- %System%\SET9.tmp
- %System%\SETB.tmp
- %System%\SET2.tmp
- %System%\SET4.tmp
- %System%\SET6.tmp
- %System%\SET8.tmp
- %System%\SETA.tmp
- %System%\SETC.tmp
Step 6
Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT_014687.TOMB. 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 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.
- b3b73ad67IHWF.exe
- %Windows%\fonts\msgothic.ttf
- %Windows%\fonts\msuigoth.ttf
- %Windows%\fonts\MSMINCHO.TTF
- %Windows%\fonts\Gulim.ttf
- %Windows%\fonts\Gulimche.ttf
- %Windows%\fonts\Dotum.ttf
- %Windows%\fonts\Batang.ttf
- %Windows%\fonts\Gungsuh.ttf
- %Windows%\fonts\Simsun.ttf
- %Windows%\fonts\nsimsun.ttf
- %Windows%\fonts\MingLiU.ttf
- %Windows%\fonts\pmingliu.ttf
- %System%\SET2.tmp
- %System%\kbd101b.dll
- %System%\SET4.tmp
- %System%\kbd101c.dll
- %System%\SET6.tmp
- %System%\kbd103.dll
- %System%\SET8.tmp
- %System%\kbd106.dll
- %System%\SETA.tmp
- %System%\kbdjpn.dll
- %System%\SETC.tmp
- %System%\kbdkor.dll
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