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This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
This backdoor adds the following folders:
(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).. %System% is the Windows system folder, which is usually C:\Windows\System32.)
It drops the following component file(s):
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It drops the following copies of itself into the affected system:
This backdoor registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\torType = "10"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\torStart = "2"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\torImagePath = "%Program Files%\Tor\tor.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\torDisplayName = "Tor Win32 Service"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\torObjectName = "NT AUTHORITY\LocalService"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\torDescription = "Provides an anonymous Internet communication system"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name ServiceType = "10"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name ServiceStart = "2"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name ServiceImagePath = "%System%\config\systemprofile\Local Settings\Application Data\Windows Internet Name Service\wins.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name ServiceDisplayName = "Windows Internet Name Service"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name ServiceGroup = "netsvcs"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name ServiceObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name ServiceDescription = "Provides Internet Name Service"
Other System Modifications
This backdoor adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Windows Internet Name Service
This backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:
NOTES: This backdoor drops the TOR client %Program Files%\Tor\tor.exe.
It uses the following parameters to perform routine:
The malware will attempt to connect to the following Onion Addresses via TOR Network:
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Restart in Safe Mode
To restart in Safe Mode:
• For Windows 2000 users
• For Windows XP users
• For Windows Server 2003 users
• For Windows Vista and Windows 7 users
Search and delete this folder
To delete the malware/grayware folder:
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.
To delete the registry key this malware/grayware created:
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_MEVADE.C. 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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