Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'RavMon.exe' = '<SYSTEM32>\RavMon.exe'
Malicious functions:
Creates and executes the following:
- '%PROGRAM_FILES%\WindowsUpdate\4.exe'
- '%PROGRAM_FILES%\WindowsUpdate\3.exe'
- '%PROGRAM_FILES%\WindowsUpdate\2.exe'
- '%PROGRAM_FILES%\WindowsUpdate\300.exe'
- '%PROGRAM_FILES%\WindowsUpdate\4.exe' (downloaded from the Internet)
- '%PROGRAM_FILES%\WindowsUpdate\3.exe' (downloaded from the Internet)
- '%PROGRAM_FILES%\WindowsUpdate\300.exe' (downloaded from the Internet)
- '%PROGRAM_FILES%\WindowsUpdate\2.exe' (downloaded from the Internet)
Executes the following:
- '<SYSTEM32>\cmd.exe' /c <SYSTEM32>\Deleteme.bat
Injects code into
the following system processes:
- %WINDIR%\Explorer.EXE
Modifies file system :
Creates the following files:
- %PROGRAM_FILES%\WindowsUpdate\2.exe
- %PROGRAM_FILES%\WindowsUpdate\3.exe
- %PROGRAM_FILES%\WindowsUpdate\4.exe
- <SYSTEM32>\RavMon.exe
- <SYSTEM32>\Deleteme.bat
- %PROGRAM_FILES%\WindowsUpdate\300.exe
Deletes itself.
Network activity:
Connects to:
- 'sk#.#q13x.cn':80
- 'localhost':1039
TCP:
HTTP GET requests:
- http://sk#.#q13x.cn/3.exe
- http://sk#.#q13x.cn/4.exe
- http://sk#.#q13x.cn/300.exe
- http://sk#.#q13x.cn/2.exe
UDP:
- DNS ASK sk#.#q13x.cn
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'Shell_TrayWnd' WindowName: ''
