Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Rwku' = '%LOCALAPPDATA%\Rwku.url'
Malicious functions
Injects code into
the following system processes:
- %WINDIR%\syswow64\notepad.exe
the following user processes:
- ieinstal.exe
Searches for registry branches where third party applications store passwords
- [<HKCU>\Software\LinasFTP\Site Manager]
- [<HKCU>\Software\FlashPeak\BlazeFtp\Settings]
- [<HKCU>\Software\Ghisler\Total Commander]
- [<HKCU>\Software\Far\Plugins\FTP\Hosts]
- [<HKCU>\Software\Far2\Plugins\FTP\Hosts]
- [<HKCU>\Software\VanDyke\SecureFX]
- [<HKLM>\Software\Wow6432Node\NCH Software\Fling\Accounts]
- [<HKCU>\Software\NCH Software\Fling\Accounts]
- [<HKLM>\Software\Wow6432Node\NCH Software\ClassicFTP\FTPAccounts]
- [<HKCU>\Software\NCH Software\ClassicFTP\FTPAccounts]
- [<HKCU>\Software\SimonTatham\PuTTY\Sessions]
- [<HKLM>\Software\Wow6432Node\SimonTatham\PuTTY\Sessions]
- [<HKCU>\Software\Martin Prikryl]
- [<HKLM>\Software\Wow6432Node\Martin Prikryl]
- [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook]
Reads files which store third party applications passwords
- %APPDATA%\mozilla\firefox\profiles.ini
- %LOCALAPPDATA%\google\chrome\user data\default\login data
- %APPDATA%\opera software\opera stable\login data
- %APPDATA%\thunderbird\profiles.ini
Modifies file system
Creates the following files
- %TEMP%\rwkurgv.exe
- %TEMP%\rwku
- C:\users\public\cde.bat
- C:\users\public\x.bat
- C:\users\public\x.vbs
- C:\users\public\natso.bat
- %LOCALAPPDATA%\rwkunet.exe
- %LOCALAPPDATA%\rwku
- %LOCALAPPDATA%\rwku.url
- %ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\policy.vpol
- %ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\3ccd5499-87a8-4b10-a215-608888dd3b55.vsch
- %ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\2f1a6504-0641-44cf-8bb5-3612d865f2e5.vsch
- %LOCALAPPDATA%\microsoft\vault\4bf4c442-9b8a-41a0-b380-dd4a704ddb28\policy.vpol
- %APPDATA%\e6f983\35a09b.hdb
- %APPDATA%\e6f983\35a09b.lck
- %APPDATA%\e6f983\35a09b.exe
Sets the 'hidden' attribute to the following files
- %APPDATA%\e6f983\35a09b.exe
Deletes the following files
- %APPDATA%\e6f983\35a09b.lck
- C:\users\public\x.bat
- C:\users\public\natso.bat
- C:\users\public\cde.bat
- C:\users\public\x.vbs
Substitutes the following files
- %APPDATA%\Microsoft\Crypto\RSA\S-1-5-21-1960123792-2022915161-3775307078-1001\f58155b4b1d5a524ca0261c3ee99fb50_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
Network activity
Connects to
- 'fr###onga.ga':80
TCP
HTTP POST requests
- http://fr###onga.ga/tropical/fre.php
UDP
- DNS ASK fr###onga.ga
Miscellaneous
Searches for the following windows
- ClassName: 'EDIT' WindowName: ''
Creates and executes the following
- '%TEMP%\rwkurgv.exe'
- '%WINDIR%\syswow64\cmd.exe' /c C:\Users\Public\Natso.bat' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\notepad.exe'
- '%ProgramFiles(x86)%\internet explorer\ieinstal.exe'
- '%WINDIR%\syswow64\cmd.exe' /c C:\Users\Public\Natso.bat
- '%WINDIR%\syswow64\reg.exe' delete hkcu\Environment /v windir /f
- '%WINDIR%\syswow64\reg.exe' add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\x.bat reg delete hkcu\Environment /v windir /f && REM "
- '%WINDIR%\syswow64\schtasks.exe' /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
