Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\RWLN] 'Startup' = 'WLEventStartup'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\RWLN] 'Logon' = 'WLEventLogon'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\RWLN] 'DllName' = 'RWLN.dll'
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\Services\RManService] 'Start' = '00000002'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
Creates and executes the following:
- '%TEMP%\rutserv.exe' /start
- '%TEMP%\rutserv.exe'
- '%TEMP%\rfusclient.exe' /tray
- '%TEMP%\rms.exe'
- '%TEMP%\rutserv.exe' /silentinstall
- '%TEMP%\rutserv.exe' /firewall
Executes the following:
- '<SYSTEM32>\net1.exe' stop "Service Host Controller"
- '<SYSTEM32>\net.exe' stop "Service Host Controller"
- '<SYSTEM32>\sc.exe' config tlntsvr start= disabled
- '%WINDIR%\regedit.exe' /s set.reg
- '<SYSTEM32>\schtasks.exe' /delete /tn security /f
- '<SYSTEM32>\net1.exe' user HelpAssistant /delete
- '<SYSTEM32>\net1.exe' stop Telnet
- '<SYSTEM32>\sc.exe' config SharedAccess start= disabled
- '<SYSTEM32>\cmd.exe' /c ""%TEMP%\7ZSfx000.cmd" "
- '<SYSTEM32>\wscript.exe' "%TEMP%\stop.js"
- '<SYSTEM32>\net.exe' stop Telnet
- '<SYSTEM32>\net1.exe' stop rserver3
- '<SYSTEM32>\net.exe' stop rserver3
Modifies file system :
Creates the following files:
- <SYSTEM32>\catroot3\msvcp90.dll
- <SYSTEM32>\catroot3\Microsoft.VC90.CRT.manifest
- <SYSTEM32>\catroot3\rfusclient.exe
- <SYSTEM32>\catroot3\msvcr90.dll
- <SYSTEM32>\catroot3\dsfVorbisDecoder.dll
- %TEMP%\7ZSfx000.cmd
- <SYSTEM32>\catroot3\gdiplus.dll
- <SYSTEM32>\catroot3\dsfVorbisEncoder.dll
- <SYSTEM32>\catroot3\RIPCServer.dll
- <SYSTEM32>\catroot3\ID.txt
- <SYSTEM32>\catroot3\vp8encoder.dll
- <SYSTEM32>\RWLN.dll
- <SYSTEM32>\catroot3\msimg32.dll
- <SYSTEM32>\catroot3\RWLN.dll
- <SYSTEM32>\catroot3\rutserv.exe
- <SYSTEM32>\catroot3\vp8decoder.dll
- <SYSTEM32>\catroot3\set.reg
- %TEMP%\rutserv.exe
- %TEMP%\rfusclient.exe
- %TEMP%\dsfVorbisEncoder.dll
- %TEMP%\dsfVorbisDecoder.dll
- %TEMP%\stop.js
- %TEMP%\Microsoft.VC90.CRT.manifest
- %TEMP%\set.reg
- %TEMP%\ID.txt
- %TEMP%\gdiplus.dll
- %TEMP%\vp8encoder.dll
- %TEMP%\vp8decoder.dll
- %TEMP%\rms.exe
- %TEMP%\msimg32.dll
- %TEMP%\msvcr90.dll
- %TEMP%\msvcp90.dll
- %TEMP%\RWLN.dll
- %TEMP%\RIPCServer.dll
Deletes the following files:
- %TEMP%\7ZSfx000.cmd
- %TEMP%\stop.js
Deletes itself.
Network activity:
Connects to:
- 'rm#####ver.tektonit.ru':563
- 'rm#####ver.tektonit.ru':5655
UDP:
- DNS ASK rm#####ver.tektonit.ru
Miscellaneous:
Searches for the following windows:
- ClassName: 'RegEdit_RegEdit' WindowName: ''
