Trojan.KeyLogger.19807

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '%ALLUSERSPROFILE%\Application Data\csrss.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'services' = '%ALLUSERSPROFILE%\Application Data\services.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'lsass' = '%ALLUSERSPROFILE%\Application Data\lsass.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = '%WINDIR%\Explorer.exe %WINDIR%\cache\apps\Microsoft\Applications\Ms-office\Ms-Word\Networking\internet\system32\TangoCharle.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe <SYSTEM32>\1036\winlogon.exe'

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\TlntSvr] 'Start' = '00000002'

Creates the following files on removable media:

<Drive name for removable media>:\MobileSoftwares.exe
<Drive name for removable media>:\SamsungCurvyTools.exe
<Drive name for removable media>:\forOffice.exe
<Drive name for removable media>:\NewAvira.exe
<Drive name for removable media>:\Downloads.exe
<Drive name for removable media>:\Nimbuzz.exe
<Drive name for removable media>:\Nod32.exe
<Drive name for removable media>:\office2011.exe
<Drive name for removable media>:\PornFilms.exe
<Drive name for removable media>:\Sharedfiles.exe
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\picnic\picnic.cobra
<Drive name for removable media>:\Games\Games.exe
<Drive name for removable media>:\Games\Games.cobra
<Drive name for removable media>:\picnic\picnic.exe
<Drive name for removable media>:\VIDEO_TS.exe
<Drive name for removable media>:\Cobra Riderz.exe
<Drive name for removable media>:\Songs.exe
<Drive name for removable media>:\<Virus name>.exe
<Drive name for removable media>:\Games\flashGames.exe
<Drive name for removable media>:\picnic\photos.exe
<Drive name for removable media>:\picnic\videos.exe
<Drive name for removable media>:\Games\MiniclipGames.exe
<Drive name for removable media>:\mig33.exe
<Drive name for removable media>:\Blankcard.exe
<Drive name for removable media>:\Fifa2011.exe
<Drive name for removable media>:\UltimateRacing.exe
<Drive name for removable media>:\TangoCharle.exe
<Drive name for removable media>:\facebook.exe
<Drive name for removable media>:\DjRemixes.exe
<Drive name for removable media>:\DonotLook.exe

Malicious functions:

To bypass firewall, removes or modifies the following registry keys:

[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\tlntsvr.exe' = '<SYSTEM32>\tlntsvr.exe:*:Enabled:iexplorer'

Creates and executes the following:

'<SYSTEM32>\lssas.exe'

Executes the following:

'<SYSTEM32>\regsvr32.exe' /s <SYSTEM32>\tlntsvrp.dll
'<SYSTEM32>\tlntsvr.exe'
'<SYSTEM32>\netsh.exe' firewall set allowedprogram <SYSTEM32>\nc.exe iexplorer enable
'<SYSTEM32>\netsh.exe' firewall set allowedprogram <SYSTEM32>\iexplorer.exe iexplorer enable
'<SYSTEM32>\netsh.exe' firewall set allowedprogram <SYSTEM32>\tskmgr.exe iexplorer enable
'<SYSTEM32>\sc.exe' start tlntsvr
'<SYSTEM32>\net1.exe' localgroup %USERNAME%s Redbull /add
'<SYSTEM32>\net1.exe' user Redbull 123456789 /add
'<SYSTEM32>\net1.exe' localgroup 'remote desktop users' Redbull /add
'<SYSTEM32>\netsh.exe' firewall set allowedprogram <SYSTEM32>\tlntsvr.exe iexplorer enable
'<SYSTEM32>\sc.exe' config tlntsvr start= auto

Installs hooks to intercept notifications

on keystrokes:

Handler for all processes: <SYSTEM32>\KeyLogger.dll

Modifies settings of Windows Internet Explorer:

[<HKCU>\Software\Microsoft\Internet Explorer\Main] 'Window Title' = 'Suck what the Fuck!!! (Cobra RiderZ)'

Sets a new unauthorized home page for Windows Internet Explorer.

Modifies file system :

Creates the following files:

C:\ProgramFiles.exe
<SYSTEM32>\Nt.cobra
%WINDIR%.exe
C:\Drivers.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\mediafire[1].rar
%WINDIR%\netcat.zip
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\nc11nt[1].zip
%WINDIR%\netcat.rar
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\nc11nt[1].zip
%ALLUSERSPROFILE%\Application Data\services.exe
%TEMP%\aut2.tmp
<SYSTEM32>\lssas.exe
%TEMP%\aut1.tmp
<SYSTEM32>\keylogger.dll
%TEMP%\aut3.tmp
%ALLUSERSPROFILE%\Application Data\lsass.exe
%ALLUSERSPROFILE%\Application Data\csrss.exe
%WINDIR%\cache\apps\Microsoft\Applications\Ms-office\Ms-Word\Networking\internet\system32\TangoCharle.exe
<SYSTEM32>\1036\winlogon.exe

Sets the 'hidden' attribute to the following files:

<Drive name for removable media>:\PornFilms.exe
<Drive name for removable media>:\<Virus name>.exe
<Drive name for removable media>:\autorun.inf

Deletes the following files:

<Drive name for removable media>:\Games\Games.cobra
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\nc11nt[1].zip
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\nc11nt[1].zip
<Drive name for removable media>:\Games\Games.exe
%TEMP%\aut1.tmp
%TEMP%\aut2.tmp
%TEMP%\aut3.tmp

Network activity:

Connects to:

'www.do####adnetcat.com':80
'www.me###fire.com':80

TCP:

HTTP GET requests:

www.do####adnetcat.com/nc11nt.zip
www.me###fire.com/?br####################

UDP:

DNS ASK www.do####adnetcat.com
DNS ASK www.me###fire.com

Miscellaneous:

Searches for the following windows:

ClassName: 'Shell_TrayWnd' WindowName: ''

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