Trojan.DownLoader19.64389

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'IP Reports Key AuthIP Management' = '<SYSTEM32>\nxthksmsbhin.exe'

Creates or modifies the following files:

%HOMEPATH%\Start Menu\Programs\Startup\nxthksmsbhin.exe

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\Grouping Server Link Compatibility IP Smart] 'ImagePath' = '<SYSTEM32>\nxthksmsbhin.exe'
[<HKLM>\SYSTEM\ControlSet001\Services\Grouping Server Link Compatibility IP Smart] 'Start' = '00000002'

Malicious functions:

To complicate detection of its presence in the operating system,

blocks the following features:

Windows Security Center

Creates and executes the following:

'<SYSTEM32>\qcdpycki.exe' "<SYSTEM32>\nxthksmsbhin.exe"
'%WINDIR%\Temp\krwcxcf3iavwzgjf.exe' -r 25397 tcp
'%TEMP%\krwcxcf39qpwzgjhszsyguc.exe'
'<SYSTEM32>\nxthksmsbhin.exe'

Modifies file system:

Creates the following files:

<SYSTEM32>\nwycarl\run
<SYSTEM32>\nwycarl\rng
%WINDIR%\Temp\krwcxcf3iavwzgjf.exe
<SYSTEM32>\nwycarl\cfg
<SYSTEM32>\qcdpycki.exe
%TEMP%\krwcxcf39qpwzgjhszsyguc.exe
<SYSTEM32>\nwycarl\tst
<SYSTEM32>\nxthksmsbhin.exe
<SYSTEM32>\nwycarl\etc

Sets the 'hidden' attribute to the following files:

<SYSTEM32>\qcdpycki.exe
<SYSTEM32>\nxthksmsbhin.exe

Deletes the following files:

%WINDIR%\Temp\krwcxcf3iavwzgjf.exe
<DRIVERS>\etc\hosts
%TEMP%\krwcxcf39qpwzgjhszsyguc.exe

Substitutes the HOSTS file.

Network activity:

Connects to:

'en###nine.net':80
'li###ever.net':80
'li###ine.net':80
'li###tart.net':80
'en###start.net':80
'ba###tart.net':80
'st###start.net':80
'st###sing.net':80
'en###never.net':80
'ba###ing.net':80
'mo###start.net':80
'ti###ine.net':80
'ti###tart.net':80
'ti###ing.net':80
'mo###sing.net':80
'li###ing.net':80
'en###sing.net':80
'mo###never.net':80
'mo###nine.net':80
'ti###ever.net':80
'ba###ine.net':80
'am###stol.com':80
'vi###mojo.com':80
'lo###ing.net':80
'wh###never.net':80
'so###ing.net':80
'el#####arimagine.com':80
'do####club-grup.com':80
'ja###uter.com':80
'mo###uia.com':80
'mo###itio.com':80
'sa###ing.net':80
'wh###sing.net':80
'st###never.net':80
'st###nine.net':80
'ba###ever.net':80
'wh###nine.net':80
'sa###ever.net':80
'sa###ine.net':80
'sa###tart.net':80
'wh###start.net':80

TCP:

HTTP GET requests:

http://en###nine.net/forum/search.php?me#########################################
http://li###ever.net/forum/search.php?me#########################################
http://li###ine.net/forum/search.php?me#########################################
http://li###tart.net/forum/search.php?me#########################################
http://en###start.net/forum/search.php?me#########################################
http://ba###tart.net/forum/search.php?me#########################################
http://st###start.net/forum/search.php?me#########################################
http://st###sing.net/forum/search.php?me#########################################
http://en###never.net/forum/search.php?me#########################################
http://ba###ing.net/forum/search.php?me#########################################
http://mo###start.net/forum/search.php?me#########################################
http://ti###ine.net/forum/search.php?me#########################################
http://ti###tart.net/forum/search.php?me#########################################
http://ti###ing.net/forum/search.php?me#########################################
http://mo###sing.net/forum/search.php?me#########################################
http://li###ing.net/forum/search.php?me#########################################
http://en###sing.net/forum/search.php?me#########################################
http://mo###never.net/forum/search.php?me#########################################
http://mo###nine.net/forum/search.php?me#########################################
http://ti###ever.net/forum/search.php?me#########################################
http://ba###ine.net/forum/search.php?me#########################################
http://am###stol.com/forum/search.php?me#########################################
http://vi###mojo.com/forum/search.php?me#########################################
http://lo###ing.net/forum/search.php?me#########################################
http://wh###never.net/forum/search.php?me#########################################
http://so###ing.net/forum/search.php?me#########################################
http://el#####arimagine.com/forum/search.php?me#########################################
http://do####club-grup.com/forum/search.php?me#########################################
http://ja###uter.com/forum/search.php?me#########################################
http://mo###uia.com/forum/search.php?me#########################################
http://mo###itio.com/forum/search.php?me#########################################
http://sa###ing.net/forum/search.php?me#########################################
http://wh###sing.net/forum/search.php?me#########################################
http://st###never.net/forum/search.php?me#########################################
http://st###nine.net/forum/search.php?me#########################################
http://ba###ever.net/forum/search.php?me#########################################
http://wh###nine.net/forum/search.php?me#########################################
http://sa###ever.net/forum/search.php?me#########################################
http://sa###ine.net/forum/search.php?me#########################################
http://sa###tart.net/forum/search.php?me#########################################
http://wh###start.net/forum/search.php?me#########################################