Win32.Siggen.8

Technical Information

To ensure autorun and distribution:

Creates or modifies the following files:

%HOMEPATH%\Start Menu\Programs\Startup\mhrhcrji.exe

Substitutes the following executable system files:

<SYSTEM32>\dllcache\msdaenum.dll with <SYSTEM32>\dllcache\msdaenum.dll.new
<SYSTEM32>\dllcache\msdadc.dll with <SYSTEM32>\dllcache\msdadc.dll.new
<SYSTEM32>\dllcache\msdfmap.dll with <SYSTEM32>\dllcache\msdfmap.dll.new
<SYSTEM32>\dllcache\msdaorar.dll with <SYSTEM32>\dllcache\msdaorar.dll.new
<SYSTEM32>\dllcache\msdaora.dll with <SYSTEM32>\dllcache\msdaora.dll.new
<SYSTEM32>\dllcache\msdaer.dll with <SYSTEM32>\dllcache\msdaer.dll.new
<SYSTEM32>\dllcache\msdaremr.dll with <SYSTEM32>\dllcache\msdaremr.dll.new
<SYSTEM32>\dllcache\msaddsr.dll with <SYSTEM32>\dllcache\msaddsr.dll.new
<SYSTEM32>\dllcache\msadds.dll with <SYSTEM32>\dllcache\msadds.dll.new
<SYSTEM32>\dllcache\msadcs.dll with <SYSTEM32>\dllcache\msadcs.dll.new
<SYSTEM32>\dllcache\msdarem.dll with <SYSTEM32>\dllcache\msdarem.dll.new
<SYSTEM32>\dllcache\msdaprst.dll with <SYSTEM32>\dllcache\msdaprst.dll.new
<SYSTEM32>\dllcache\msdaprsr.dll with <SYSTEM32>\dllcache\msdaprsr.dll.new
<SYSTEM32>\dllcache\msdaosp.dll with <SYSTEM32>\dllcache\msdaosp.dll.new
<SYSTEM32>\dllcache\oledb32r.dll with <SYSTEM32>\dllcache\oledb32r.dll.new
<SYSTEM32>\dllcache\oledb32.dll with <SYSTEM32>\dllcache\oledb32.dll.new
<SYSTEM32>\dllcache\msxactps.dll with <SYSTEM32>\dllcache\msxactps.dll.new
<SYSTEM32>\dllcache\wab32res.dll with <SYSTEM32>\dllcache\wab32res.dll.new
<SYSTEM32>\dllcache\wab32.dll with <SYSTEM32>\dllcache\wab32.dll.new
<SYSTEM32>\dllcache\sqlxmlx.dll with <SYSTEM32>\dllcache\sqlxmlx.dll.new
<SYSTEM32>\dllcache\msdaurl.dll with <SYSTEM32>\dllcache\msdaurl.dll.new
<SYSTEM32>\dllcache\msdasql.dll with <SYSTEM32>\dllcache\msdasql.dll.new
<SYSTEM32>\dllcache\msdasc.dll with <SYSTEM32>\dllcache\msdasc.dll.new
<SYSTEM32>\dllcache\msdaps.dll with <SYSTEM32>\dllcache\msdaps.dll.new
<SYSTEM32>\dllcache\msdatt.dll with <SYSTEM32>\dllcache\msdatt.dll.new
<SYSTEM32>\dllcache\msdatl3.dll with <SYSTEM32>\dllcache\msdatl3.dll.new
<SYSTEM32>\dllcache\msdasqlr.dll with <SYSTEM32>\dllcache\msdasqlr.dll.new
<SYSTEM32>\dllcache\mssoapr.dll with <SYSTEM32>\dllcache\mssoapr.dll.new
<SYSTEM32>\dllcache\mssoap1.dll with <SYSTEM32>\dllcache\mssoap1.dll.new
<SYSTEM32>\dllcache\fp4autl.dll with <SYSTEM32>\dllcache\fp4autl.dll.new
<SYSTEM32>\dllcache\spttseng.dll with <SYSTEM32>\dllcache\spttseng.dll.new
<SYSTEM32>\dllcache\spcommon.dll with <SYSTEM32>\dllcache\spcommon.dll.new
<SYSTEM32>\dllcache\wisc10.dll with <SYSTEM32>\dllcache\wisc10.dll.new
<SYSTEM32>\dllcache\vgx.dll with <SYSTEM32>\dllcache\vgx.dll.new
<SYSTEM32>\dllcache\spcplui.dll with <SYSTEM32>\dllcache\spcplui.dll.new
<SYSTEM32>\dllcache\msinfo32.exe with <SYSTEM32>\dllcache\msinfo32.exe.new
<SYSTEM32>\dllcache\dao360.dll with <SYSTEM32>\dllcache\dao360.dll.new
<SYSTEM32>\dllcache\triedit.dll with <SYSTEM32>\dllcache\triedit.dll.new
<SYSTEM32>\dllcache\sapisvr.exe with <SYSTEM32>\dllcache\sapisvr.exe.new
<SYSTEM32>\dllcache\sapi.dll with <SYSTEM32>\dllcache\sapi.dll.new
<SYSTEM32>\dllcache\msader15.dll with <SYSTEM32>\dllcache\msader15.dll.new
<SYSTEM32>\dllcache\msadcf.dll with <SYSTEM32>\dllcache\msadcf.dll.new
<SYSTEM32>\dllcache\msadcer.dll with <SYSTEM32>\dllcache\msadcer.dll.new
<SYSTEM32>\dllcache\msadce.dll with <SYSTEM32>\dllcache\msadce.dll.new
<SYSTEM32>\dllcache\msadcor.dll with <SYSTEM32>\dllcache\msadcor.dll.new
<SYSTEM32>\dllcache\msadco.dll with <SYSTEM32>\dllcache\msadco.dll.new
<SYSTEM32>\dllcache\msadcfr.dll with <SYSTEM32>\dllcache\msadcfr.dll.new
<SYSTEM32>\dllcache\directdb.dll with <SYSTEM32>\dllcache\directdb.dll.new
<SYSTEM32>\dllcache\msador15.dll with <SYSTEM32>\dllcache\msador15.dll.new
<SYSTEM32>\dllcache\msadomd.dll with <SYSTEM32>\dllcache\msadomd.dll.new
<SYSTEM32>\dllcache\msado15.dll with <SYSTEM32>\dllcache\msado15.dll.new
<SYSTEM32>\dllcache\msjro.dll with <SYSTEM32>\dllcache\msjro.dll.new
<SYSTEM32>\dllcache\msadrh15.dll with <SYSTEM32>\dllcache\msadrh15.dll.new
<SYSTEM32>\dllcache\msadox.dll with <SYSTEM32>\dllcache\msadox.dll.new

Creates the following files on removable media:

<Drive name for removable media>:\RECYCLER\S-4-1-64-6485106370-3484243580-765143303-0064\sPbJpCKX.cpl
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\RECYCLER\S-4-1-64-6485106370-3484243580-765143303-0064\mdggrWoK.exe

Malicious functions:

Injects code into

the following system processes:

<SYSTEM32>\cscript.exe

a large number of user processes.

Modifies file system :

Creates the following files:

<SYSTEM32>\dllcache\msdaenum.dll.new
<SYSTEM32>\dllcache\msdadc.dll.new
<SYSTEM32>\dllcache\msdfmap.dll.new
<SYSTEM32>\dllcache\msdaorar.dll.new
<SYSTEM32>\dllcache\msdaora.dll.new
<SYSTEM32>\dllcache\msdaer.dll.new
<SYSTEM32>\dllcache\msdaremr.dll.new
<SYSTEM32>\dllcache\msaddsr.dll.new
<SYSTEM32>\dllcache\msadds.dll.new
<SYSTEM32>\dllcache\msadcs.dll.new
<SYSTEM32>\dllcache\msdarem.dll.new
<SYSTEM32>\dllcache\msdaprst.dll.new
<SYSTEM32>\dllcache\msdaprsr.dll.new
<SYSTEM32>\dllcache\msdaosp.dll.new
<SYSTEM32>\dllcache\oledb32r.dll.new
<SYSTEM32>\dllcache\oledb32.dll.new
<SYSTEM32>\dllcache\msxactps.dll.new
<SYSTEM32>\dllcache\wab32res.dll.new
<SYSTEM32>\dllcache\wab32.dll.new
<SYSTEM32>\dllcache\sqlxmlx.dll.new
<SYSTEM32>\dllcache\msdaurl.dll.new
<SYSTEM32>\dllcache\msdasql.dll.new
<SYSTEM32>\dllcache\msdasc.dll.new
<SYSTEM32>\dllcache\msdaps.dll.new
<SYSTEM32>\dllcache\msdatt.dll.new
<SYSTEM32>\dllcache\msdatl3.dll.new
<SYSTEM32>\dllcache\msdasqlr.dll.new
<SYSTEM32>\dllcache\msadcor.dll.new
<SYSTEM32>\dllcache\mssoap1.dll.new
<SYSTEM32>\dllcache\fp4autl.dll.new
<SYSTEM32>\dllcache\vgx.dll.new
<SYSTEM32>\dllcache\spcommon.dll.new
<SYSTEM32>\dllcache\wisc10.dll.new
<SYSTEM32>\dllcache\mssoapr.dll.new
<SYSTEM32>\dllcache\triedit.dll.new
<SYSTEM32>\dllcache\msinfo32.exe.new
<SYSTEM32>\dllcache\dao360.dll.new
%PROGRAM_FILES%\Internet Explorer\dmlconf.dat
<SYSTEM32>\dllcache\sapisvr.exe.new
<SYSTEM32>\dllcache\sapi.dll.new
<SYSTEM32>\dllcache\spcplui.dll.new
<SYSTEM32>\dllcache\spttseng.dll.new
<SYSTEM32>\dllcache\msadcer.dll.new
<SYSTEM32>\dllcache\msadce.dll.new
<SYSTEM32>\dllcache\directdb.dll.new
<SYSTEM32>\dllcache\msadco.dll.new
<SYSTEM32>\dllcache\msadcfr.dll.new
<SYSTEM32>\dllcache\msadcf.dll.new
<SYSTEM32>\dllcache\msjro.dll.new
<SYSTEM32>\dllcache\msadomd.dll.new
<SYSTEM32>\dllcache\msado15.dll.new
<SYSTEM32>\dllcache\msader15.dll.new
<SYSTEM32>\dllcache\msadrh15.dll.new
<SYSTEM32>\dllcache\msadox.dll.new
<SYSTEM32>\dllcache\msador15.dll.new

Sets the 'hidden' attribute to the following files:

%HOMEPATH%\Start Menu\Programs\Startup\mhrhcrji.exe

Network activity:

Connects to:

'rt####jyuver.com':447
'wq######rstyhcerveantbe.com':447
'tv#####nyvwstrtve.com':447
'su###wdmn.com':447
'74.##5.232.51':80

UDP:

DNS ASK rt####jyuver.com
DNS ASK wq######rstyhcerveantbe.com
DNS ASK tv#####nyvwstrtve.com
DNS ASK su###wdmn.com
DNS ASK google.com

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