Technical Information
To ensure autorun and distribution:
Creates the following files on removable media:
- <Drive name for removable media>:\esfqc.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:ipsec'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
blocks the following features:
- User Account Control (UAC)
- Windows Security Center
Executes the following:
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen %TEMP%\QRFF.jpg
Injects code into
the following system processes:
- <SYSTEM32>\rundll32.exe
a large number of user processes.
Modifies file system :
Creates the following files:
- C:\autorun.inf
- C:\ywyox.exe
- %TEMP%\winrbaj.exe
- %TEMP%\winxldnf.exe
- %TEMP%\QRFF.jpg
- %TEMP%\winhvkol.exe
- <DRIVERS>\fkimt.sys
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\esfqc.exe
- C:\autorun.inf
- C:\ywyox.exe
Deletes the following files:
- %TEMP%\winxldnf.exe
- <DRIVERS>\fkimt.sys
- %TEMP%\winhvkol.exe
Network activity:
Connects to:
- 'ma######iaescalante.com.ar':80
- 'tr####.no-ip.org':95
TCP:
HTTP GET requests:
- ma######iaescalante.com.ar/images/logo.gif?63##########
UDP:
- DNS ASK ma######iaescalante.com.ar
- DNS ASK tr####.no-ip.org
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'ShImgVw:CPreviewWnd' WindowName: ''
