Trojan.DownLoader11.23977

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\fsp_lmwl] 'Startup' = 'LMStartup'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\fsp_lmwl] 'DllName' = 'fsp_lmwl.dll'

Malicious functions:

Creates and executes the following:

'%PROGRAM_FILES%\Lock My PC 4\lockpc.exe' /i
'%PROGRAM_FILES%\Lock My PC 4\lockpc.exe' /s
'%TEMP%\7zS1.tmp\lmpc4.exe' /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-
'%TEMP%\is-B0OOG.tmp\lmpc4.tmp' /SL5="$50036,1996152,118784,%TEMP%\7zS1.tmp\lmpc4.exe" /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-

Executes the following:

'<SYSTEM32>\sc.exe' delete LmpcService
'<SYSTEM32>\sc.exe' stop LmpcService

Modifies file system :

Creates the following files:

%PROGRAM_FILES%\Lock My PC 4\LockScreens\is-5FCG7.tmp
%PROGRAM_FILES%\Lock My PC 4\LockScreens\is-F5PLV.tmp
%HOMEPATH%\Start Menu\Programs\Lock My PC 4\FSPro Labs in Web ....lnk
%PROGRAM_FILES%\Lock My PC 4\LockScreens\is-IIKET.tmp
%PROGRAM_FILES%\Lock My PC 4\LockScreens\is-MI11S.tmp
%PROGRAM_FILES%\Lock My PC 4\LockScreens\is-9MV7C.tmp
%PROGRAM_FILES%\Lock My PC 4\LockScreens\is-61233.tmp
%PROGRAM_FILES%\Lock My PC 4\unins000.msg
%PROGRAM_FILES%\Lock My PC 4\unins000.dat
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\release-notes[1].html
%HOMEPATH%\Start Menu\Programs\Lock My PC 4\Uninstall Lock My PC.lnk
%HOMEPATH%\Start Menu\Programs\Lock My PC 4\Lock My PC.lnk
%HOMEPATH%\Start Menu\Programs\Lock My PC 4\Lock My PC Settings.lnk
%HOMEPATH%\Start Menu\Programs\Lock My PC 4\Lock My PC Help.lnk
%PROGRAM_FILES%\Lock My PC 4\is-9U87G.tmp
%PROGRAM_FILES%\Lock My PC 4\is-2V2NS.tmp
<DRIVERS>\is-Q51S2.tmp
%PROGRAM_FILES%\Lock My PC 4\is-H5KA2.tmp
%TEMP%\7zS1.tmp\lmpc4.exe
%TEMP%\is-B0OOG.tmp\lmpc4.tmp
%TEMP%\is-RN5D1.tmp\_isetup\_shfoldr.dll
%PROGRAM_FILES%\Lock My PC 4\is-9AAGC.tmp
%PROGRAM_FILES%\Lock My PC 4\is-S0MT0.tmp
%PROGRAM_FILES%\Lock My PC 4\LockScreens\is-HOAHE.tmp
%PROGRAM_FILES%\Lock My PC 4\is-SSML3.tmp
<SYSTEM32>\is-16AC6.tmp
%PROGRAM_FILES%\Lock My PC 4\is-00T52.tmp
%PROGRAM_FILES%\Lock My PC 4\is-ORCAM.tmp

Deletes the following files:

%TEMP%\7zS1.tmp\lmpc4.exe
%TEMP%\is-B0OOG.tmp\lmpc4.tmp
%TEMP%\is-RN5D1.tmp\_isetup\_shfoldr.dll

Moves the following files:

from %PROGRAM_FILES%\Lock My PC 4\LockScreens\is-MI11S.tmp to %PROGRAM_FILES%\Lock My PC 4\LockScreens\lockscreen2.jpg
from %PROGRAM_FILES%\Lock My PC 4\LockScreens\is-9MV7C.tmp to %PROGRAM_FILES%\Lock My PC 4\LockScreens\lockscreen3.jpg
from %PROGRAM_FILES%\Lock My PC 4\is-S0MT0.tmp to %PROGRAM_FILES%\Lock My PC 4\Register.url
from %PROGRAM_FILES%\Lock My PC 4\LockScreens\is-HOAHE.tmp to %PROGRAM_FILES%\Lock My PC 4\LockScreens\lockscreen1.jpg
from %PROGRAM_FILES%\Lock My PC 4\LockScreens\is-5FCG7.tmp to %PROGRAM_FILES%\Lock My PC 4\LockScreens\lockscreen6_r.gif
from %PROGRAM_FILES%\Lock My PC 4\LockScreens\is-F5PLV.tmp to %PROGRAM_FILES%\Lock My PC 4\LockScreens\sample.isf
from %PROGRAM_FILES%\Lock My PC 4\LockScreens\is-61233.tmp to %PROGRAM_FILES%\Lock My PC 4\LockScreens\lockscreen4.jpg
from %PROGRAM_FILES%\Lock My PC 4\LockScreens\is-IIKET.tmp to %PROGRAM_FILES%\Lock My PC 4\LockScreens\lockscreen5_b.gif
from %PROGRAM_FILES%\Lock My PC 4\is-9AAGC.tmp to %PROGRAM_FILES%\Lock My PC 4\FSProLabs.url
from %PROGRAM_FILES%\Lock My PC 4\is-2V2NS.tmp to %PROGRAM_FILES%\Lock My PC 4\lockcp.exe
from <DRIVERS>\is-Q51S2.tmp to <DRIVERS>\lmpc4.sys
from %PROGRAM_FILES%\Lock My PC 4\is-H5KA2.tmp to %PROGRAM_FILES%\Lock My PC 4\unins000.exe
from %PROGRAM_FILES%\Lock My PC 4\is-9U87G.tmp to %PROGRAM_FILES%\Lock My PC 4\lockpc.exe
from %PROGRAM_FILES%\Lock My PC 4\is-ORCAM.tmp to %PROGRAM_FILES%\Lock My PC 4\lockmypc.chm
from %PROGRAM_FILES%\Lock My PC 4\is-SSML3.tmp to %PROGRAM_FILES%\Lock My PC 4\license.txt
from <SYSTEM32>\is-16AC6.tmp to <SYSTEM32>\fsp_lmwl.dll
from %PROGRAM_FILES%\Lock My PC 4\is-00T52.tmp to %PROGRAM_FILES%\Lock My PC 4\LockLib.dll