Technical Information
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] 'C:\RealtekSoundDriver\Microsoft Core Service.exe' = 'C:\RealtekSoundDriver\Microsoft Core Service.exe:*:Enabled:Microsoft COM Interop'
Creates and executes the following:
- 'C:\RealtekSoundDriver\Microsoft Core Service.exe'
Executes the following:
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen <Current directory>\Laska.jpg
Modifies file system :
Creates the following files:
- %HOMEPATH%\Recent\Laska.lnk
- %HOMEPATH%\Recent\bf32d3b0.lnk
- <Current directory>\Laska.jpg
- C:\RealtekSoundDriver\Microsoft Core Service.exe
Network activity:
Connects to:
- '85.##8.134.233':21
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'ShImgVw:CPreviewWnd' WindowName: '(null)'
