Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'XUuOy' = '%LOCALAPPDATA%\XUuOym\XUuOymctL.hta'
Creates or modifies the following files
- <SYSTEM32>\tasks\'calc'
Modifies file system
Creates the following files
- %LOCALAPPDATA%\xuuoym\xuuoy.exe
- %LOCALAPPDATA%\xuuoym\xuuoy.vbs
- %LOCALAPPDATA%\xuuoym\xuuoymctl.hta
- %APPDATA%\calc.exe
- %TEMP%\tmpd16b.tmp.bat
- nul
Network activity
TCP
HTTP GET requests
- http://www.microsoft.com/pki/certs/MicRooCerAut_2010-06-23.crt
UDP
- DNS ASK fa#####kvas.duckdns.org
- DNS ASK microsoft.com
Miscellaneous
Creates and executes the following
- '%APPDATA%\calc.exe'
- '%WINDIR%\syswow64\schtasks.exe' /create /f /sc ONLOGON /RL HIGHEST /tn "'calc"' /tr "'%APPDATA%\calc.exe"'' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\schtasks.exe' /create /f /sc ONLOGON /RL HIGHEST /tn "'calc"' /tr "'%APPDATA%\calc.exe"'
- '%WINDIR%\syswow64\cmd.exe' /c ""%TEMP%\tmpD16B.tmp.bat""
- '%WINDIR%\syswow64\timeout.exe' 3
- '%WINDIR%\microsoft.net\framework\v4.0.30319\regsvcs.exe'
