Technical Information
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\server.exe' = '%APPDATA%\server.exe:*:Enabled:server.exe'
Creates and executes the following:
- '%APPDATA%\server.exe'
- 'C:\Extracted\Server.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\server.exe" "server.exe" ENABLE
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen C:\Extracted\tumblr_m8mii1lBZL1qiy6tm.jpg
Modifies file system :
Creates the following files:
- %APPDATA%\server.exe
- %HOMEPATH%\Recent\tumblr_m8mii1lBZL1qiy6tm.lnk
- %HOMEPATH%\Recent\Extracted.lnk
- %TEMP%\sfx.ini
- C:\Extracted\tumblr_m8mii1lBZL1qiy6tm.jpg
- C:\Extracted\Server.exe
Deletes the following files:
- %TEMP%\sfx.ini
Network activity:
Connects to:
- '<Private IP address>':1177
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'
- ClassName: 'ShImgVw:CPreviewWnd' WindowName: '(null)'
