Backdoor.Win32.Jix.a

tag:Backdoors  

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This Trojan has a built-in remote administration tool.

The program itself is a Windows PE EXE file approximately 15KB in size, packed using UPX. The unpacked file is approximately 25KB in size.

Once launched, the Trojan copies itself to the Windows system directory under one of the following names:

%Systemr%\upnphost.exe 
%System%\pnphost.exe 
%System%\winpnp.exe

The backdoor scans other computers for the presence of the LSASS vulnerability and then installs itself on the vulnerable machine.

The backdoor uses TCP port 5533 to transform the victim machine into an FTP server.

The Trojan connects to IRC server 203.167.78.35 in order to receive commands. Once this connection has been established, a malicious remote user will be able to download any file onto the victim machine using the FTP server, launch these files, terminate processes and access information about the computer or its user.

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