Win32.HLLW.Autoruner1.29268

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'kavav.exe' = '%WINDIR%\winlog\screensaver.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'kavavp.exe' = '%WINDIR%\winlog\screensaver.exe'

Creates the following files on removable media:

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

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files
file extensions

blocks execution of the following system utilities:

Windows Task Manager (Taskmgr)

Creates and executes the following:

<LS_APPDATA>\Karla.exe

Executes the following:

<SYSTEM32>\attrib.exe +S +H +R "L:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "M:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "C:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "K:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "J:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "I:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "O:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "P:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "I:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "H:\autorun.inf"
<SYSTEM32>\ping.exe 127.0.0.1 -n 5
<SYSTEM32>\attrib.exe +S +H +R "J:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "E:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "<Drive name for removable media>:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "G:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "F:\autorun.inf"
<SYSTEM32>\attrib.exe +S +H +R "H:\Karla.EXE"
<SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d "1" /f
<SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced /v HideFileExt /t REG_DWORD /d "1" /f
<SYSTEM32>\attrib.exe +S +H +R "O:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "P:\Karla.EXE"
<SYSTEM32>\reg.exe ADD HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v kavavp.exe /t REG_SZ /d "%WINDIR%\winlog\screensaver.exe" /f
<SYSTEM32>\attrib.exe +r +a +s +h %WINDIR%\winlog
<SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced /v Hidden /t REG_DWORD /d "2" /f
<SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v kavav.exe /t REG_SZ /d "%WINDIR%\winlog\screensaver.exe" /f
<SYSTEM32>\attrib.exe +S +H +R "E:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "<Drive name for removable media>:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "G:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "F:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "L:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "M:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "C:\Karla.EXE"
<SYSTEM32>\attrib.exe +S +H +R "K:\Karla.EXE"

Modifies file system :

Creates the following files:

%WINDIR%\winlog\WINUPDATE.DLL
C:\autorun.inf
<LS_APPDATA>\Karla.exe
%TEMP%\a02860.bat

Sets the 'hidden' attribute to the following files:

<Drive name for removable media>:\autorun.inf
C:\autorun.inf
%TEMP%\a02860.bat

Miscellaneous:

Searches for the following windows:

ClassName: 'Indicator' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''

テクノロジー

用語

トレーニングコースおよび啓蒙プロジェクト

アンチウイルスに関する誤解と噂

Technical Information