Win32.Expiro.97

Technical Information

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\idsvc] '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\dmadmin] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\COMSysApp] 'Start' = '00000002'

Changes the following executable system files:

<SYSTEM32>\calc.exe
<SYSTEM32>\accwiz.exe
<SYSTEM32>\rundll32.exe
<SYSTEM32>\sndrec32.exe
<SYSTEM32>\mstsc.exe
<SYSTEM32>\rcimlby.exe
<SYSTEM32>\utilman.exe
<SYSTEM32>\osk.exe
<SYSTEM32>\notepad.exe
<SYSTEM32>\tourstart.exe
<SYSTEM32>\mobsync.exe
<SYSTEM32>\sndvol32.exe
<SYSTEM32>\freecell.exe
<SYSTEM32>\odbcad32.exe
<SYSTEM32>\mshearts.exe
<SYSTEM32>\sol.exe
<SYSTEM32>\winmine.exe
<SYSTEM32>\Restore\rstrui.exe
<SYSTEM32>\ntbackup.exe
<SYSTEM32>\mspaint.exe
<SYSTEM32>\charmap.exe
<SYSTEM32>\usmt\migwiz.exe
<SYSTEM32>\cleanmgr.exe
<SYSTEM32>\narrator.exe
<SYSTEM32>\imapi.exe
<SYSTEM32>\dmadmin.exe
%WINDIR%\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\infocard.exe
<SYSTEM32>\msdtc.exe
<SYSTEM32>\mnmsrvc.exe
<SYSTEM32>\dllhost.exe
<SYSTEM32>\cisvc.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\aspnet_state.exe
<SYSTEM32>\clipsrv.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mscorsvw.exe
<SYSTEM32>\msiexec.exe
<SYSTEM32>\vssvc.exe
<SYSTEM32>\ups.exe
<SYSTEM32>\wbem\wmiapsrv.exe
<SYSTEM32>\magnify.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\WPF\WPFFontCache_v0400.exe
<SYSTEM32>\tlntsvr.exe
<SYSTEM32>\sessmgr.exe
<SYSTEM32>\netdde.exe
<SYSTEM32>\locator.exe
<SYSTEM32>\smlogsvc.exe
<SYSTEM32>\scardsvr.exe

Infects the following executable files:

<SYSTEM32>\sndvol32.exe
<SYSTEM32>\sndrec32.exe
<SYSTEM32>\mstsc.exe
<SYSTEM32>\mspaint.exe
<SYSTEM32>\cleanmgr.exe
<SYSTEM32>\charmap.exe
<SYSTEM32>\ntbackup.exe
<SYSTEM32>\rundll32.exe
%PROGRAM_FILES%\Outlook Express\msimn.exe
%PROGRAM_FILES%\Internet Explorer\IEXPLORE.EXE
<SYSTEM32>\tourstart.exe
<SYSTEM32>\rcimlby.exe
%PROGRAM_FILES%\Windows NT\hypertrm.exe
<SYSTEM32>\calc.exe
<SYSTEM32>\accwiz.exe
%PROGRAM_FILES%\MSN Gaming Zone\Windows\Rvsezm.exe
%PROGRAM_FILES%\MSN Gaming Zone\Windows\hrtzzm.exe
%PROGRAM_FILES%\MSN Gaming Zone\Windows\chkrzm.exe
%PROGRAM_FILES%\MSN Gaming Zone\Windows\shvlzm.exe
<SYSTEM32>\sol.exe
%PROGRAM_FILES%\Windows NT\Pinball\PINBALL.EXE
<SYSTEM32>\winmine.exe
%PROGRAM_FILES%\MSN Gaming Zone\Windows\bckgzm.exe
<SYSTEM32>\Restore\rstrui.exe
%CommonProgramFiles%\Microsoft Shared\MSInfo\msinfo32.exe
<SYSTEM32>\usmt\migwiz.exe
%PROGRAM_FILES%\Windows NT\Accessories\wordpad.exe
<SYSTEM32>\mshearts.exe
<SYSTEM32>\freecell.exe
<SYSTEM32>\odbcad32.exe
<SYSTEM32>\msdtc.exe
<SYSTEM32>\mnmsrvc.exe
%WINDIR%\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\infocard.exe
<SYSTEM32>\msiexec.exe
<SYSTEM32>\locator.exe
<SYSTEM32>\sessmgr.exe
<SYSTEM32>\netdde.exe
<SYSTEM32>\imapi.exe
<SYSTEM32>\clipsrv.exe
<SYSTEM32>\cisvc.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\aspnet_state.exe
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mscorsvw.exe
<SYSTEM32>\dmadmin.exe
<SYSTEM32>\dllhost.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe
<SYSTEM32>\utilman.exe
<SYSTEM32>\osk.exe
<SYSTEM32>\narrator.exe
%PROGRAM_FILES%\Outlook Express\wab.exe
<SYSTEM32>\mobsync.exe
<SYSTEM32>\notepad.exe
%PROGRAM_FILES%\Windows Media Player\wmplayer.exe
<SYSTEM32>\magnify.exe
<SYSTEM32>\tlntsvr.exe
<SYSTEM32>\smlogsvc.exe
<SYSTEM32>\scardsvr.exe
<SYSTEM32>\ups.exe
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\WPF\WPFFontCache_v0400.exe
<SYSTEM32>\wbem\wmiapsrv.exe
<SYSTEM32>\vssvc.exe

Malicious functions:

Executes the following:

'%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe' -UseCLSID {61411606-9EFA-425F-B3B8-C08CA8F69317} -Comment "NGen Worker Process"
'<SYSTEM32>\dmadmin.exe' /com
'%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe' -UseCLSID {2D404A28-E323-4BCD-B070-77813481BD24} -Comment "NGen Worker Process"
'%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe' -UseCLSID {BD476AF4-BEF6-41EF-BDA4-137F0EC90BC8} -Comment "NGen Worker Process"
'%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mscorsvw.exe'
'<SYSTEM32>\cisvc.exe'
'<SYSTEM32>\dllhost.exe' /Processid:{02D4B3F1-FD88-11D1-960D-00805FC79235}
'%WINDIR%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe'

Modifies settings of Windows Internet Explorer:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1406' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '2103' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2] '1609' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1609' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '1609' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '1406' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '2103' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2] '1406' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0] '1609' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0] '1406' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0] '2103' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '2103' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2] '2103' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1609' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1406' = '00000000'

Modifies file system :

Creates the following files:

<SYSTEM32>\fijffced.tmp
<SYSTEM32>\pnhochhl.tmp
%PROGRAM_FILES%\Windows NT\bglnccaf.tmp
<SYSTEM32>\mnclgkoo.tmp
<SYSTEM32>\ejlkpjei.tmp
<SYSTEM32>\gkbpadmi.tmp
<SYSTEM32>\dnmejccm.tmp
<SYSTEM32>\ghpbhbif.tmp
%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\extensions\{571c7873-cd35-cf2d-b846-20687f011a38}\chrome.manifest
%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\extensions\{571c7873-cd35-cf2d-b846-20687f011a38}\install.rdf
<SYSTEM32>\mhcigiko.tmp
<LS_APPDATA>\wsr34zt32.dll
<SYSTEM32>\klncjook.tmp
<SYSTEM32>\ckjgpiji.tmp
%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\extensions\{571c7873-cd35-cf2d-b846-20687f011a38}\chrome\content.jar
%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\extensions\{571c7873-cd35-cf2d-b846-20687f011a38}\components\rooka.js
<SYSTEM32>\bafefhom.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\hjfbngae.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\hnefggen.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\ndphlgfh.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\iabjpiql.tmp
<SYSTEM32>\cblhiehk.tmp
%WINDIR%\assembly\NativeImages_v4.0.30319_32\Temp\d04-0\MSBuild.exe
<SYSTEM32>\aacmkkpi.tmp
%PROGRAM_FILES%\Windows NT\Pinball\npcafjmf.tmp
<SYSTEM32>\Restore\pnpndocj.tmp
%PROGRAM_FILES%\Windows NT\Accessories\jaemdheq.tmp
<SYSTEM32>\usmt\kcndgmlj.tmp
%CommonProgramFiles%\Microsoft Shared\MSInfo\cgcganec.tmp
<SYSTEM32>\jkkbiphh.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\nleaigbf.tmp
<SYSTEM32>\geakanpm.tmp
<SYSTEM32>\enmgfdcm.tmp
%PROGRAM_FILES%\Outlook Express\nlbdlone.tmp
<SYSTEM32>\bcmjfhem.tmp
<SYSTEM32>\gnllopeo.tmp
<SYSTEM32>\lpdincki.tmp
%WINDIR%\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\bdidjodb.tmp
<SYSTEM32>\pkmidmmk.tmp
<SYSTEM32>\lbccaiql.tmp
<SYSTEM32>\hpfnbggj.tmp
<SYSTEM32>\lkkbimfi.tmp
<SYSTEM32>\jijphkgh.tmp
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mlmkhako.tmp
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\findcpnb.tmp
<SYSTEM32>\pehqjlgp.tmp
<SYSTEM32>\oghloddb.tmp
%WINDIR%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{AEF8894D-FA91-449E-8088-494C77D9ACB0}.crmlog
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\jakqkigl.tmp
<SYSTEM32>\bganglfb.tmp
<SYSTEM32>\cbqfodnn.tmp
%PROGRAM_FILES%\Outlook Express\bflplhbi.tmp
%PROGRAM_FILES%\Windows Media Player\foonnqfh.tmp
<SYSTEM32>\cinbejkf.tmp
<SYSTEM32>\ffajdngb.tmp
<SYSTEM32>\gehooqbd.tmp
%PROGRAM_FILES%\Internet Explorer\abfngioj.tmp
<SYSTEM32>\idgopplk.tmp
<SYSTEM32>\bhpkofoa.tmp
<SYSTEM32>\iidepkqd.tmp
<SYSTEM32>\oinlhfcb.tmp
<SYSTEM32>\kojfgpbg.tmp
<SYSTEM32>\dgoiockd.tmp
<SYSTEM32>\ohkgfmgd.tmp
<SYSTEM32>\cnfeakll.tmp
<SYSTEM32>\wbem\calahkmd.tmp
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\WPF\akkgdmck.tmp

Deletes the following files:

<SYSTEM32>\dnmejccm.tmp
<SYSTEM32>\pnhochhl.tmp
<SYSTEM32>\fijffced.tmp
<SYSTEM32>\ghpbhbif.tmp
<SYSTEM32>\bafefhom.tmp
<SYSTEM32>\gkbpadmi.tmp
<SYSTEM32>\ejlkpjei.tmp
<SYSTEM32>\mnclgkoo.tmp
<SYSTEM32>\mhcigiko.tmp
%PROGRAM_FILES%\Outlook Express\nlbdlone.tmp
%PROGRAM_FILES%\Internet Explorer\abfngioj.tmp
%APPDATA%\Mozilla\Firefox\Profiles\cwdgt0y8.default\extensions.sqlite.new
%PROGRAM_FILES%\Windows NT\bglnccaf.tmp
<SYSTEM32>\ckjgpiji.tmp
<SYSTEM32>\klncjook.tmp
<SYSTEM32>\usmt\kcndgmlj.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\hnefggen.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\hjfbngae.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\iabjpiql.tmp
<SYSTEM32>\aacmkkpi.tmp
%WINDIR%\assembly\NativeImages_v4.0.30319_32\index1b.dat
<SYSTEM32>\cblhiehk.tmp
%PROGRAM_FILES%\Windows NT\Pinball\npcafjmf.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\ndphlgfh.tmp
%PROGRAM_FILES%\Windows NT\Accessories\jaemdheq.tmp
<SYSTEM32>\Restore\pnpndocj.tmp
%CommonProgramFiles%\Microsoft Shared\MSInfo\cgcganec.tmp
<SYSTEM32>\geakanpm.tmp
%PROGRAM_FILES%\MSN Gaming Zone\Windows\nleaigbf.tmp
<SYSTEM32>\jkkbiphh.tmp
<SYSTEM32>\enmgfdcm.tmp
<SYSTEM32>\gehooqbd.tmp
<SYSTEM32>\bcmjfhem.tmp
%WINDIR%\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\bdidjodb.tmp
<SYSTEM32>\lpdincki.tmp
<SYSTEM32>\gnllopeo.tmp
<SYSTEM32>\pkmidmmk.tmp
<SYSTEM32>\lkkbimfi.tmp
<SYSTEM32>\hpfnbggj.tmp
%WINDIR%\Registration\{02D4B3F1-FD88-11D1-960D-00805FC79235}.{BF4C4D5C-6924-41E8-9BF1-DCC37DF6F31D}.crmlog
<SYSTEM32>\jijphkgh.tmp
<SYSTEM32>\pehqjlgp.tmp
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\findcpnb.tmp
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\mlmkhako.tmp
<SYSTEM32>\oghloddb.tmp
<SYSTEM32>\bganglfb.tmp
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\jakqkigl.tmp
<SYSTEM32>\lbccaiql.tmp
<SYSTEM32>\ffajdngb.tmp
<SYSTEM32>\cinbejkf.tmp
<SYSTEM32>\cnfeakll.tmp
%PROGRAM_FILES%\Outlook Express\bflplhbi.tmp
<SYSTEM32>\bhpkofoa.tmp
<SYSTEM32>\idgopplk.tmp
%PROGRAM_FILES%\Windows Media Player\foonnqfh.tmp
<SYSTEM32>\ohkgfmgd.tmp
<SYSTEM32>\dgoiockd.tmp
<SYSTEM32>\kojfgpbg.tmp
<SYSTEM32>\cbqfodnn.tmp
<SYSTEM32>\iidepkqd.tmp
%WINDIR%\Microsoft.NET\Framework\v4.0.30319\WPF\akkgdmck.tmp
<SYSTEM32>\wbem\calahkmd.tmp
<SYSTEM32>\oinlhfcb.tmp

Moves the following files:

from %WINDIR%\assembly\NativeImages_v4.0.30319_32\Temp\d04-0\MSBuild.exe to %WINDIR%\assembly\NativeImages_v4.0.30319_32\MSBuild\aa25092606e5e9826db7a7bd0adb9b2b\MSBuild.ni.exe

Miscellaneous:

Searches for the following windows:

ClassName: 'Shell_TrayWnd' WindowName: '(null)'

Technologies

Terminology

Training and education

Myths

Technical Information