Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [HKCU\Software\Microsoft\Windows\CurrentVersion\Run] 'yGbzOMp' = '%APPDATA%\yGbzOMp\yGbzOMp.exe'
Creates or modifies the following files
- <SYSTEM32>\tasks\updates\hrpwvysf
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion:
- '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath "<Full path to file>"
- '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath "%APPDATA%\hRPwVYSf.exe"
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework\v4.0.30319\regsvcs.exe
Searches for registry branches where third party applications store passwords
- [HKCU\Software\RimArts\B2\Settings]
- [HKCU\SOFTWARE\FTPWare\COREFTP\Sites]
- [HKCU\SOFTWARE\Martin Prikryl\WinSCP 2\Sessions]
- [HKLM\Software\WOW6432Node\ORL\WinVNC3]
- [HKCU\Software\ORL\WinVNC3]
Reads files which store third party applications passwords
- %APPDATA%\opera software\opera stable\login data
- %LOCALAPPDATA%\google\chrome\user data\default\login data
- %APPDATA%\thunderbird\profiles.ini
- %APPDATA%\mozilla\firefox\profiles.ini
Modifies file system
Creates the following files
- %APPDATA%\hrpwvysf.exe
- %TEMP%\tmpe739.tmp
- %LOCALAPPDATA%\microsoft\clr_v4.0_32\usagelogs\<File name>.exe.log
- %APPDATA%\ygbzomp\ygbzomp.exe
Sets the 'hidden' attribute to the following files
- %APPDATA%\hrpwvysf.exe
Modifies the following files
- %LOCALAPPDATA%\microsoft\vault\userprofileroaming\latest.dat
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath "<Full path to file>"' (with hidden window)
- '%WINDIR%\syswow64\windowspowershell\v1.0\powershell.exe' Add-MpPreference -ExclusionPath "%APPDATA%\hRPwVYSf.exe"' (with hidden window)
- '%WINDIR%\syswow64\schtasks.exe' /Create /TN "Updates\hRPwVYSf" /XML "%TEMP%\tmpE739.tmp"' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\schtasks.exe' /Create /TN "Updates\hRPwVYSf" /XML "%TEMP%\tmpE739.tmp"
- '%WINDIR%\microsoft.net\framework\v4.0.30319\regsvcs.exe'
