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Win32.HLLW.MyBot.9039
Added to the Dr.Web virus database:
2012-08-17
Virus description added:
2012-09-07
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices] 'Microsoft Setup Initializazion' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Microsoft Setup Initializazion' = 'rundll32.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'wextract_cleanup0' = 'rundll32.exe <SYSTEM32>\advpack.dll,DelNodeRunDLL32 "%TEMP%\IXP000.TMP\"'
Infects the following executable system files:
Substitutes the following executable system files:
<SYSTEM32>\dllcache\rundll32.exe with <SYSTEM32>\dllcache\rundll32.exe.new
<SYSTEM32>\rundll32.exe with <SYSTEM32>\rundll32.exe.new
Malicious functions:
Creates and executes the following:
%TEMP%\IXP000.TMP\rundll32.exe
Executes the following:
%WINDIR%\regedit.exe /S %TEMP%\1.reg
<SYSTEM32>\rundll32.exe 316 "%TEMP%\IXP000.TMP\rundll32.exe"
<SYSTEM32>\cmd.exe /c c:\a.bat
Modifies file system :
Creates the following files:
<SYSTEM32>\rundll32.exe.new
<SYSTEM32>\dllcache\rundll32.exe.new
%TEMP%\1.reg
%TEMP%\IXP000.TMP\rundll32.exe
C:\a.bat
Deletes the following files:
<SYSTEM32>\rundll32.exe.tmp
%TEMP%\1.reg
%TEMP%\IXP000.TMP\rundll32.exe
Network activity:
Connects to:
'25#.#55.255.255':7654
'g3#.###3stuff4u.info':7654
UDP:
DNS ASK g3#.###3stuff4u.info
Miscellaneous:
Searches for the following windows:
ClassName: 'RegEdit_RegEdit' WindowName: ''
ClassName: 'mIRC' WindowName: ''
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