Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'HKLM' = ''
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'HKCU' = ''
- [<HKLM>\SOFTWARE\Microsoft\Active Setup\Installed Components\{51OJP3P8-G5J8-AO37-W36J-UH634W3E10X3}] 'StubPath' = '<SYSTEM32>\install\server.exe Restart'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'ai_c_H_' = '%TEMP%\nut.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'Policies' = ''
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Policies' = ''
Malicious functions:
Creates and executes the following:
- '<SYSTEM32>\install\server.exe'
Executes the following:
- '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe'
- '<SYSTEM32>\reg.exe' add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "ai_c_H_" /t REG_SZ /d "%TEMP%\nut.exe
Injects code into
the following system processes:
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe
Modifies file system :
Creates the following files:
- %TEMP%\%USERNAME%8
- %TEMP%\%USERNAME%7
- %TEMP%\2BEF1.dmp
- %TEMP%\dw.log
- <SYSTEM32>\install\server.exe
- %TEMP%\nut.exe
- %APPDATA%\%USERNAME%log.dat
- %TEMP%\%USERNAME%2.txt
Sets the 'hidden' attribute to the following files:
- %APPDATA%\%USERNAME%log.dat
Deletes the following files:
- %TEMP%\%USERNAME%7
- %TEMP%\%USERNAME%8
- %TEMP%\%USERNAME%2.txt
Network activity:
Connects to:
- 'nu####.no-ip.info':1177
UDP:
- DNS ASK nu####.no-ip.info
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
