TROJ_VB.IGO
Trojan:Win32/Malat (Microsoft); Generic.dx!xvb (McAfee); Trojan.Gen (Symantec); PAK:UPX, Trojan.Win32.Buzus.csxo, Trojan.Win32.Buzus.csxo (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Inject.VB.H (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
20,992 bytes
EXE
Yes
11 Dec 2011
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%\ect\scvhost.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It creates the following folders:
- %System%\ect
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
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
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServicesOnce
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{08B0E5C0-4FCB-11CF-AAX5-00401C608512}
StubPath = "%System%\ect\scvhost.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunServices
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunServicesOnce
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Active Setup\Installed Components\{08B0E5C0-4FCB-11CF-AAX5-00401C608512}
StubPath = "%System%\ect\scvhost.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServicesOnce
HKEY_LOCAL_MACHINE\Software\Microsoft\
Active Setup\Installed Components\{08B0E5C0-4FCB-11CF-AAX5-00401C608512}
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunServices
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunServicesOnce
HKEY_CURRENT_USER\Software\Microsoft\
OLE
HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\
Control\Lsa
HKEY_CURRENT_USER\Software\Microsoft\
Active Setup\Installed Components\{08B0E5C0-4FCB-11CF-AAX5-00401C608512}
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Ole
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Lsa
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_CURRENT_USER\Software\Microsoft\
OLE
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\
Control\Lsa
Hotfix-KB429492032402 = "%System%\ect\scvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Startup = "%System%\ect\scvhost.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
User Shell Folders
Startup = "%System%\ect\scvhost.exe"
It modifies the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Startup = "%System%\ect\scvhost.exe"
(Note: The default value data of the said registry entry is %User Startup%.)
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
User Shell Folders
Startup = "%System%\ect\scvhost.exe"
(Note: The default value data of the said registry entry is %USERPROFILE%\Start Menu\Programs\Startup.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}62.2/{random path}
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
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\Software\Microsoft\Windows\CurrentVersion
- RunServices
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion
- RunServicesOnce
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components
- {08B0E5C0-4FCB-11CF-AAX5-00401C608512}
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- RunOnce
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- RunServices
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- RunServicesOnce
- In HKEY_CURRENT_USER\Software\Microsoft
- OLE
- In HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Control
- Lsa
- In HKEY_CURRENT_USER\Software\Microsoft\Active Setup\Installed Components
- {08B0E5C0-4FCB-11CF-AAX5-00401C608512}
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
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServicesOnce
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{08B0E5C0-4FCB-11CF-AAX5-00401C608512}
- StubPath="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServicesOnce
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Active Setup\Installed Components\{08B0E5C0-4FCB-11CF-AAX5-00401C608512}
- StubPath="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\OLE
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\SYSTEM\CurrentControlSet\Control\Lsa
- Hotfix-KB429492032402="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
- Startup="%System%\ect\scvhost.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
- Startup="%System%\ect\scvhost.exe"
Step 5
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
- From: Startup="%System%\ect\scvhost.exe"
To: Startup=%User Startup%
- From: Startup="%System%\ect\scvhost.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
- From: Startup="%System%\ect\scvhost.exe"
To: Startup=%USERPROFILE%\Start Menu\Programs\Startup
- From: Startup="%System%\ect\scvhost.exe"
Step 6
Search and delete this folder
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_VB.IGO. 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.
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