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Win32.HLLW.Autoruner1.27540
Added to the Dr.Web virus database:
2012-10-10
Virus description added:
2012-10-17
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Classes\lnkfile\shell\open\command] '' = '"<SYSTEM32>\change\SMSS.EXE" "%1" %*'
[<HKLM>\SOFTWARE\Classes\batfile\shell\open\command] '' = '"<SYSTEM32>\change\SMSS.EXE" "%1" %*'
[<HKLM>\SOFTWARE\Classes\piffile\shell\open\command] '' = '"<SYSTEM32>\change\SMSS.EXE" "%1" %*'
[<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"<SYSTEM32>\conime.exe" "%1" %*'
[<HKLM>\SOFTWARE\Classes\comfile\shell\open\command] '' = '"<SYSTEM32>\change\SMSS.EXE" "%1" %*'
[<HKLM>\SOFTWARE\Classes\VBSFile\Shell\Open\Command] '' = '"<SYSTEM32>\change\SMSS.EXE" "%1" %*'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\change\Lsass.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\regedit.exe] 'Debugger' = '<SYSTEM32>\conime.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msconfig.exe] 'Debugger' = '<SYSTEM32>\conime.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Taskmgr.exe] 'Debugger' = '<SYSTEM32>\sol.exe'
Creates the following files on removable media:
<Drive name for removable media>:\AUTORUN.INF
<Drive name for removable media>:\barry\lsass.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
hidden files
file extensions
Creates and executes the following:
<SYSTEM32>\change\services.exe
Terminates or attempts to terminate
the following user processes:
MCAGENT.EXE
nod32.exe
bdagent.exe
ashAvast.exe
avgcc.exe
Modifies settings of Windows Explorer:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoShellSearchButton' = ''
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFind' = ''
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoDrives' = ''
Modifies file system :
Creates the following files:
<SYSTEM32>\ baldemo.inf
%WINDIR%\system\userinit.exe
C:\AUTORUN.INF
C:\barry\lsass.exe
<SYSTEM32>\change\csrss.exe
<SYSTEM32>\change\services.exe
<SYSTEM32>\change\Lsass.exe
<SYSTEM32>\change\SMSS.EXE
Sets the 'hidden' attribute to the following files:
C:\AUTORUN.INF
<Drive name for removable media>:\AUTORUN.INF
<SYSTEM32>\change\SMSS.EXE
<SYSTEM32>\change\csrss.exe
Deletes the following files:
Miscellaneous:
Searches for the following windows:
ClassName: 'ExploreWClass' WindowName: ''
ClassName: 'CabinetWClass' WindowName: ''
ClassName: '' WindowName: 'Local Settings'
ClassName: 'RegEdit_RegEdit' WindowName: ''
ClassName: '' WindowName: 'Registry Editor'
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