Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'chromebrowser' = '"%WINDIR%\chromebrowser.exe"'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
Executes the following:
- '%TEMP%\dxdiag.exe'
- '%TEMP%\_ir_sf_temp_1\irsetup.exe' __IRAOFF:1790722 "__IRAFN:%TEMP%\acc.exe" "__IRCT:1" "__IRTSS:0" "__IRSID:S-1-5-21-2052111302-484763869-725345543-1003"
- '%TEMP%\_ir_sf_temp_0\irsetup.exe' __IRAOFF:1790722 "__IRAFN:<Full path to file>" "__IRCT:0" "__IRTSS:0" "__IRSID:S-1-5-21-2052111302-484763869-725345543-1003"
- '%TEMP%\acc.exe'
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Associations] 'LowRiskFileTypes' = '.avi;.bat;.com;.cmd;.exe;.htm;.html;.lnk;.mpg;.mpeg;.mov;.mp3;.msi;.m3u;.rar;.reg;.txt;.vbs;.wav;....
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments] 'SaveZoneInformation' = '00000001'
Modifies file system:
Creates the following files:
- %TEMP%\_ir_sf_temp_1\irsetup.exe
- %TEMP%\_ir_sf_temp_1\lua5.1.dll
- %WINDIR%\chromebrowser.exe
- %TEMP%\_ir_sf_temp_0\EE.enc
- %TEMP%\acc.exe
- %TEMP%\_ir_sf_temp_1\IRIMG1.JPG
- %TEMP%\_ir_sf_temp_1\IRIMG2.JPG
- %TEMP%\_ir_sf_temp_1\irsetup.dat
- %TEMP%\dxdiag.exe
- %TEMP%\CodecFixDivx.exe
- %TEMP%\_ir_sf_temp_0\IRIMG1.JPG
- %TEMP%\_ir_sf_temp_0\IRIMG2.JPG
- %TEMP%\_ir_sf_temp_0\irsetup.dat
- %TEMP%\_ir_sf_temp_0\irsetup.exe
- %TEMP%\_ir_sf_temp_0\lua5.1.dll
- %TEMP%\_ir_sf_temp_0\acc.enc
- %TEMP%\_ir_sf_temp_0\msconfig.enc
- %TEMP%\_ir_sf_temp_0\after.exe
- %TEMP%\_ir_sf_temp_0\AMOSETUP.enc
- %TEMP%\_ir_sf_temp_0\dxdiag.enc
Deletes the following files:
- %TEMP%\_ir_sf_temp_1\irsetup.dat
- %TEMP%\_ir_sf_temp_0\irsetup.exe
- %TEMP%\_ir_sf_temp_0\irsetup.dat
Miscellaneous:
Searches for the following windows:
- ClassName: '' WindowName: 'Preparing setup...'
- ClassName: '' WindowName: 'CodecFixDivx'
- ClassName: 'Shell_TrayWnd' WindowName: ''
