TROJ_DROPR.SMIQ
TrojanDropper:Win32/Cefyns.A (Microsoft); Generic Dropper.hg (McAfee); Trojan Horse (Symantec); Trojan.Win32.BHO.usp (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.810442 (FSecure)
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.
TECHNICAL DETAILS
208,896 bytes
EXE
No
24 Sep 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%\altcmd
(Note: %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 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\{F985D38B-61DE-3FCC-5872-1225C5BCB432}
Other System Modifications
This Trojan deletes the following files:
- %System%\{malware file name}
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
altcompare
HKEY_CLASSES_ROOT\MsVCL1.BhoApp.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MsVCL1.BhoApp.1\CLSID
HKEY_CLASSES_ROOT\MsVCL1.BhoApp
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MsVCL1.BhoApp\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MsVCL1.BhoApp\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\TypeLib
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
altcompare
DisplayName = "altcompare"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
altcompare
UninstallString = "%Program Files%\altcmd\uninstall.bat"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
altcompare
DisplayIcon = "%System Root%\program.exe,0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
altcompare
DisplayVersion = "1.137.1.31"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
altcompare
EstimatedSize = "20"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}\InprocServer32
ThreadingModel = "Apartment"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\TypeLib
Version = "1.0"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\TypeLib
Version = "1.0"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\altcmd\altcmd32.dll
- %Program Files%\altcmd\altcmd.inf
- %Program Files%\altcmd\uninstall.bat
(Note: %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).)
This report is generated via an automated analysis system.
SOLUTION
9.200
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
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_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
- altcompare
- In HKEY_CLASSES_ROOT
- MsVCL1.BhoApp.1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MsVCL1.BhoApp.1
- CLSID
- In HKEY_CLASSES_ROOT
- MsVCL1.BhoApp
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MsVCL1.BhoApp
- CLSID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MsVCL1.BhoApp
- CurVer
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
- {F985D38B-61DE-3FCC-5872-1225C5BCB432}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}
- VersionIndependentProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}
- Programmable
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
- {A8954909-1F0F-41A5-A7FA-3B376D69E226}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}
- 1.0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0
- FLAGS
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0
- 0
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\0
- win32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0
- HELPDIR
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
- {9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- ProxyStubClsid
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- ProxyStubClsid32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}
- TypeLib
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\Uninstall\altcompare
- DisplayName = "altcompare"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\altcompare
- UninstallString = "%Program Files%\altcmd\uninstall.bat"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\altcompare
- DisplayIcon = "%System Root%\program.exe,0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\altcompare
- DisplayVersion = "1.137.1.31"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\altcompare
- EstimatedSize = "20"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{F985D38B-61DE-3FCC-5872-1225C5BCB432}\InprocServer32
- ThreadingModel = "Apartment"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{967A494A-6AEC-4555-9CAF-FA6EB00ACF91}\TypeLib
- Version = "1.0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{9692BE2F-EB8F-49D9-A11C-C24C1EF734D5}\TypeLib
- Version = "1.0"
Step 5
Search and delete these components
- %Program Files%\altcmd\altcmd32.dll
- %Program Files%\altcmd\altcmd.inf
- %Program Files%\altcmd\uninstall.bat
Step 6
Search and delete this folder
- %Program Files%\altcmd
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPR.SMIQ. 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%\{malware file name}
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