Summary
A remote administration tool (RAT) that bypasses the security features of a program, computer or network to give unauthorized access or control to its user.
Removal
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First, check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.
Technical Details
This backdoor program may arrive as an executable file via direct download from the Internet, or as part of a trojan-downloader or trojan-dropper payload. This malware is compressed with BeRoEXEPacker v1.00.Upon installation, the malware will create a setuplog.DLL file to contain the main malware files. It will also create a copy of itself in the setuplog.bat file, in an attempt to protect the main malware file from detection and destruction by antivirus programs.
After execution, an additional created uninstal.bat file will remove the original malware files, leaving only the setuplog.dll and setuplog.bat files.Once installed, the backdoor program first attempts to connect to a remote server, to notify the malware author that an infection has taken place.
If successfully connected, it then incrementally scans one port after another on the host machine to find an open one that would allow a remote user to connect to the infected system.
Once a remote user has gained access, any of the following actions can be performed on the infected system:
- Retrieve system information (Registeredorganization, RegisteredOwner, productID, productkey,ProductName, Date and Time)
- Retrieve registry information
- Download files
- Log keystrokes
- Communicate via telnet
- Capture screen into picture file (BMP)
- Capture screen into video (AVI)
File System Changes
Creates these files:
- %windir%\setuplog.bat
- %windir%\setuplog.DLL
- %windir%\uninstal.bat
Process Changes
Creates these processes:
- %windir%\setuplog.bat
- %windir%\system32\services.exe
- %windir%\system32\cmd.exe
These modules were loaded into other processes:
- %windir%\setuplog.DLL
Creates these mutexes:
- setuplog.bat
Network Connections
Attempts to download files from:
- http://www.cnrmbcn.com/www/[...]/w.txt
Attempts to connect to:
- http://news.huigezi.com/[...]2006.htm
Registry Modifications
Sets these values:
- HKLM\System\CurrentControlSet\Services\setuplog Type = 00000110 Start = 00000002 ErrorControl = 00000000 ImagePath = C:\WINDOWS\setuplog.bat DisplayName = setuplog ObjectName = LocalSystem Description = setuplog
- HKLM\System\CurrentControlSet\Services\setuplog\Security Security = \x01\x00\x14\x80\x90\x00\x00\x00\x9C\x00\x00\x00\x14\x00\x00\x00\x30\x00\x00\x00\x02\x00\x1C\x00\x01\x00\x00\x00\x02\x80\x14\x00\xFF\x01\x0F\x00\x01\x01\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x02\x00\x60\x00\x04\x00\x00\x00\x00\x00\x14\x00\xFD\x01\x02\x00\x01\x01\x00\x00\x00\x00\x00\x05\x12\x00\x00\x00\x00\x00\x18\x00\xFF\x01\x0F\x00\x01\x02\x00\x00\x00\x00\x00\x05\x20\x00\x00\x00\x20\x02\x00\x00\x00\x00\x14\x00\x8D\x01\x02\x00\x01\x01\x00\x00\x00\x00\x00\x05\x0B\x00\x00\x00\x00\x00\x18\x00\xFD\x01\x02\x00\x01\x02\x00\x00\x00\x00\x00\x05\x20\x00\x00\x00\x23\x02\x00\x00\x01\x01\x00\x00\x00\x00\x00\x05\x12\x00\x00\x00\x01\x01\x00\x00\x00\x00\x00\x05\x12\x00\x00\x00
- HKCU\Software\Microsoft\Internet Connection Wizard Completed = \x01\x00\x00\x00
- HKCU\Software\Microsoft\Internet Explorer\Main Check_Associations = no
- HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders Cache = C:\Documents and Settings\LocalService\Local Settings\Temporary Internet Files Cookies = C:\Documents and Settings\LocalService\Cookies History = C:\Documents and Settings\LocalService\Local Settings\History
Creates these keys:
- HKLM\System\CurrentControlSet\Services\setuplog
- HKLM\System\CurrentControlSet\Services\setuplog\Security
- HKCU\Software\Microsoft\Internet Connection Wizard
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