Win32.Expiro.55

To ensure autorun and distribution:

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\NetDDE] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\MSIServer] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\mnmsrvc] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\RDSessMgr] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\WmiApSrv] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\VSS] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\TlntSvr] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\clr_optimization_v2.0.50727_32] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\ClipSrv] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\CiSvc] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\clr_optimization_v4.0.30319_32] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\ImapiService] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\idsvc] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\dmadmin] 'Start' = '00000002'

Infects the following executable system files:

<SYSTEM32>\locator.exe
<SYSTEM32>\scardsvr.exe
<SYSTEM32>\netdde.exe
<SYSTEM32>\sessmgr.exe
<SYSTEM32>\smlogsvc.exe
<SYSTEM32>\wbem\wmiapsrv.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\WPF\WPFFontCache_v0400.exe
<SYSTEM32>\tlntsvr.exe
<SYSTEM32>\vssvc.exe
<SYSTEM32>\msiexec.exe
<SYSTEM32>\clipsrv.exe
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mscorsvw.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\aspnet_state.exe
<SYSTEM32>\cisvc.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe
<SYSTEM32>\imapi.exe
<SYSTEM32>\mnmsrvc.exe
<SYSTEM32>\dmadmin.exe
%WINDIR%\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\infocard.exe

Malicious functions:

Executes the following:

Modifies file system :

Creates the following files:

<SYSTEM32>\locator.vir
<SYSTEM32>\scardsvr.vir
<SYSTEM32>\netdde.vir
<SYSTEM32>\sessmgr.vir
<SYSTEM32>\smlogsvc.vir
<SYSTEM32>\wbem\wmiapsrv.vir
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\WPF\wpffontcache_v0400.vir
<SYSTEM32>\tlntsvr.vir
<SYSTEM32>\vssvc.vir
<SYSTEM32>\msiexec.vir
<SYSTEM32>\clipsrv.vir
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mscorsvw.vir
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\aspnet_state.vir
<SYSTEM32>\cisvc.vir
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.vir
<SYSTEM32>\imapi.vir
<SYSTEM32>\mnmsrvc.vir
<SYSTEM32>\dmadmin.vir
%WINDIR%\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\infocard.vir

Deletes the following files:

<SYSTEM32>\locator.vir
<SYSTEM32>\scardsvr.vir
<SYSTEM32>\netdde.vir
<SYSTEM32>\sessmgr.vir
<SYSTEM32>\smlogsvc.vir
<SYSTEM32>\wbem\wmiapsrv.vir
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\WPF\wpffontcache_v0400.vir
<SYSTEM32>\tlntsvr.vir
<SYSTEM32>\vssvc.vir
<SYSTEM32>\msiexec.vir
<SYSTEM32>\clipsrv.vir
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mscorsvw.vir
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\aspnet_state.vir
<SYSTEM32>\cisvc.vir
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.vir
<SYSTEM32>\imapi.vir
<SYSTEM32>\mnmsrvc.vir
<SYSTEM32>\dmadmin.vir
%WINDIR%\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\infocard.vir