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Win32.HLLW.Autoruner2.6525
Added to the Dr.Web virus database:
2014-02-10
Virus description added:
2014-02-11
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '001f7a628d9c87b343ea3d9b97ebf8bd' = '"%APPDATA%\nch.exe" ..'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '001f7a628d9c87b343ea3d9b97ebf8bd' = '"%APPDATA%\nch.exe" ..'
Creates or modifies the following files:
%HOMEPATH%\Start Menu\Programs\Startup\001f7a628d9c87b343ea3d9b97ebf8bd.exe
%HOMEPATH%\Start Menu\Programs\Startup\Server.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\nch.exe' = '%APPDATA%\nch.exe:*:Enabled:nch.exe'
Creates and executes the following:
'%APPDATA%\nch.exe'
'%TEMP%\Bifrost v1.2.exe'
'%TEMP%\Server.exe'
Executes the following:
'<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\nch.exe" "nch.exe" ENABLE
Searches for windows to
detect analytical utilities:
ClassName: 'OLLYDBG' WindowName: '(null)'
Modifies file system :
Creates the following files:
%TEMP%\Bifrost v1.2.exe
%APPDATA%\nch.exe
%TEMP%\aut2.tmp
%TEMP%\aut1.tmp
%TEMP%\Server.exe
Deletes the following files:
%TEMP%\aut2.tmp
%TEMP%\aut1.tmp
Network activity:
Connects to:
'mo#####ht33.no-ip.org':1177
UDP:
DNS ASK mo#####ht33.no-ip.org
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: '(null)'
ClassName: 'Shell_TrayWnd' WindowName: '(null)'
ClassName: 'WispWindowClass' WindowName: '(null)'
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