Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'System' = 'kdcsm.exe'
Malicious functions:
Creates and executes the following:
- %TEMP%\nsc3.tmp\ns4.tmp %TEMP%\calc.exe
- %TEMP%\calc.exe
- %TEMP%\notepad.exe
- %TEMP%\network.exe
Executes the following:
- <SYSTEM32>\svchost.exe
Injects code into
the following system processes:
- <SYSTEM32>\svchost.exe
Modifies file system :
Creates the following files:
- %TEMP%\network.exe
- %TEMP%\freebsd.exe
- %TEMP%\calc.exe
- %TEMP%\nsc3.tmp\nsExec.dll
- %TEMP%\nsc3.tmp\modern-header.bmp
- <SYSTEM32>\kdcsm.exe
- %TEMP%\nsc3.tmp\ns4.tmp
- %TEMP%\notepad.exe
- %TEMP%\calc.exe.dat
- %TEMP%\notepad.exe.dat
- %TEMP%\nsr2.tmp
- %TEMP%\freebsd.exe.dat
- %TEMP%\nsc3.tmp\DcryptDll.dll
- %TEMP%\linux
- %TEMP%\network.exe.dat
Deletes the following files:
- %TEMP%\freebsd.exe
- %TEMP%\network.exe.dat
- %TEMP%\calc.exe
- %TEMP%\notepad.exe
- %TEMP%\freebsd.exe.dat
- %TEMP%\linux
- %TEMP%\nsc3.tmp\ns4.tmp
- %TEMP%\notepad.exe.dat
- %TEMP%\calc.exe.dat
Moves the following files:
- from %TEMP%\network.exe to %TEMP%\tmp5.tmp
Network activity:
Connects to:
- '21#.#55.186.235':80
- '<Private IP address>':80
TCP:
HTTP GET requests:
- <Private IP address>/
HTTP POST requests:
- 21#.#55.186.235/index.php
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: '#32770' WindowName: ''
