Trojan.MulDrop6.61445

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,,%ProgramFiles%\microsoft\desktoplayer.exe'

Creates or modifies the following files

%WINDIR%\system.ini
%HOMEPATH%\start menu\programs\startup\wfifauvs.exe

Infects the following executable files

%ALLUSERSPROFILE%\application data\adobe\setup\{ac76ba86-7ad7-1033-7b44-aa1000000001}\setup.exe
%ProgramFiles%\aswupdsv\aswupdsv.exe
%ProgramFiles%\autodown\autodown.exe
%ProgramFiles%\autostartexplorer\autostartexplorer.exe
%ProgramFiles%\autotrace\autotrace.exe
%ProgramFiles%\avadmin\avadmin.exe
%ProgramFiles%\avcenter\avcenter.exe
%ProgramFiles%\avciman\avciman.exe
%ProgramFiles%\avcmd\avcmd.exe
%ProgramFiles%\avconfig\avconfig.exe
%ProgramFiles%\avconsol\avconsol.exe
%ProgramFiles%\avgamsvr\avgamsvr.exe
%ProgramFiles%\avgcc\avgcc.exe
%ProgramFiles%\ash_updatemediator\ash_updatemediator.exe
%ProgramFiles%\aswregsvr\aswregsvr.exe
%ProgramFiles%\avgdiag\avgdiag.exe
%ProgramFiles%\avginet\avginet.exe
%ProgramFiles%\avgnpdln\avgnpdln.exe
%ProgramFiles%\avgnpsvc\avgnpsvc.exe
%ProgramFiles%\avgrssvc\avgrssvc.exe
%ProgramFiles%\avgscan\avgscan.exe
%ProgramFiles%\avgupden\avgupden.exe
%ProgramFiles%\avgupsvc\avgupsvc.exe
%ProgramFiles%\avgvv\avgvv.exe
%ProgramFiles%\avgw\avgw.exe
%ProgramFiles%\avgwizfw\avgwizfw.exe
%ProgramFiles%\avinitnt\avinitnt.exe
%ProgramFiles%\avkserv\avkserv.exe
%ProgramFiles%\avgemc\avgemc.exe
%ProgramFiles%\avgfwsrv\avgfwsrv.exe
%ProgramFiles%\avkwctl\avkwctl.exe
%ProgramFiles%\avkservice\avkservice.exe
%ProgramFiles%\ashskpck\ashskpck.exe
%ProgramFiles%\aimpro\aimpro.exe
%ProgramFiles%\airdefense\airdefense.exe
%ProgramFiles%\almon\almon.exe
%ProgramFiles%\alsvc\alsvc.exe
%ProgramFiles%\amon\amon.exe
%ProgramFiles%\amsn\amsn.exe
%ProgramFiles%\anti-trojan\anti-trojan.exe
%ProgramFiles%\antivirus\antivirus.exe
%ProgramFiles%\aoltbserver\aoltbserver.exe
%ProgramFiles%\armor2net\armor2net.exe
%ProgramFiles%\armorsurf\armorsurf.exe
%ProgramFiles%\ashupd\ashupd.exe
%ProgramFiles%\ahnsd\ahnsd.exe
%ProgramFiles%\ashwebsv\ashwebsv.exe
%ProgramFiles%\ash\ash.exe
%ProgramFiles%\ashdisp\ashdisp.exe
%ProgramFiles%\ashdug\ashdug.exe
%ProgramFiles%\ashenhcd\ashenhcd.exe
%ProgramFiles%\ashlogv\ashlogv.exe
%ProgramFiles%\ashmaisv\ashmaisv.exe
%ProgramFiles%\ashpopwz\ashpopwz.exe
%ProgramFiles%\ashquick\ashquick.exe
%ProgramFiles%\ashserv\ashserv.exe
%ProgramFiles%\ashsimp2\ashsimp2.exe
%ProgramFiles%\ashsimpl\ashsimpl.exe
%ProgramFiles%\ashskpcc\ashskpcc.exe
%ProgramFiles%\ashavast\ashavast.exe
%ProgramFiles%\ashavsrv\ashavsrv.exe
%ProgramFiles%\ashchest\ashchest.exe
%HOMEPATH%\my documents\steamsetup.exe
%ProgramFiles%\avnotify\avnotify.exe
%ProgramFiles%\cavsub\cavsub.exe
%ProgramFiles%\cavumas\cavumas.exe
%ProgramFiles%\cavuserupd\cavuserupd.exe
%ProgramFiles%\cavvl\cavvl.exe
%ProgramFiles%\ccapp\ccapp.exe
%ProgramFiles%\ccevtmgr\ccevtmgr.exe
%ProgramFiles%\ccleaner\ccleaner.exe
%ProgramFiles%\ccproxy\ccproxy.exe
%ProgramFiles%\ccsetmgr\ccsetmgr.exe
%ProgramFiles%\cemrep\cemrep.exe
%ProgramFiles%\chrome\chrome.exe
%ProgramFiles%\clamscan\clamscan.exe
%ProgramFiles%\cavsn\cavsn.exe
%ProgramFiles%\clamtray\clamtray.exe
%ProgramFiles%\cavsubmit\cavsubmit.exe
%ProgramFiles%\claw95\claw95.exe
%ProgramFiles%\cleaner\cleaner.exe
%ProgramFiles%\cleaner3\cleaner3.exe
%ProgramFiles%\clisvc\clisvc.exe
%ProgramFiles%\clrcche\clrcche.exe
%ProgramFiles%\cmain\cmain.exe
%ProgramFiles%\cmgrdian\cmgrdian.exe
%CommonProgramFiles%\adobe\arm\1.0\acrobatupdater.exe
%CommonProgramFiles%\adobe\arm\1.0\adobearm.exe
%CommonProgramFiles%\adobe\arm\1.0\adobeextractfiles.dll
%CommonProgramFiles%\adobe\arm\1.0\readerupdater.exe
%CommonProgramFiles%\adobe air\versions\1.0\adobe air application installer.exe
%ProgramFiles%\clamwin\clamwin.exe
%ProgramFiles%\cavse\cavse.exe
%ProgramFiles%\claw95cf\claw95cf.exe
%ProgramFiles%\cavscons\cavscons.exe
%ProgramFiles%\cavq\cavq.exe
%ProgramFiles%\avpm\avpm.exe
%ProgramFiles%\avsynmgr\avsynmgr.exe
%ProgramFiles%\b2\b2.exe
%ProgramFiles%\backweb-4476822\backweb-4476822.exe
%ProgramFiles%\bdagent\bdagent.exe
%ProgramFiles%\bdmcon\bdmcon.exe
%ProgramFiles%\bdnews\bdnews.exe
%ProgramFiles%\bdoesrv\bdoesrv.exe
%ProgramFiles%\bdss\bdss.exe
%ProgramFiles%\bdsubmit\bdsubmit.exe
%ProgramFiles%\bdsubmitwiz\bdsubmitwiz.exe
%ProgramFiles%\bdsurvey\bdsurvey.exe
%ProgramFiles%\bdswitch\bdswitch.exe
%ProgramFiles%\bdwizreg\bdwizreg.exe
%ProgramFiles%\avscan\avscan.exe
%ProgramFiles%\blackd\blackd.exe
%ProgramFiles%\blindman\blindman.exe
%ProgramFiles%\btini\btini.exe
%ProgramFiles%\btinint\btinint.exe
%ProgramFiles%\cabalmain\cabalmain.exe
%ProgramFiles%\cafix\cafix.exe
%ProgramFiles%\cavapp\cavapp.exe
%ProgramFiles%\cavasm\cavasm.exe
%ProgramFiles%\cavaud\cavaud.exe
%ProgramFiles%\cavemsrv\cavemsrv.exe
%ProgramFiles%\cavmr\cavmr.exe
%ProgramFiles%\cavmud\cavmud.exe
%ProgramFiles%\cavoar\cavoar.exe
%ProgramFiles%\ageofconan\ageofconan.exe
%ProgramFiles%\blackice\blackice.exe
%ProgramFiles%\aim6\aim6.exe
%ProgramFiles%\agb5\agb5.exe
%ProgramFiles%\adobe\reader 10.0\reader\viewerps.dll
%ProgramFiles%\adobe\reader 10.0\reader\sqlite.dll
%TEMP%\pyl1.tmp\bin\formats\iso.dll
%TEMP%\pyl1.tmp\bin\resize2fs.exe
%TEMP%\pyl1.tmp\pylauncher.exe
%TEMP%\pyl1.tmp\pyrun.exe
%TEMP%\pyl1.tmp\python23.dll
%ProgramFiles%\microsoft office\office12\excel.exe
%ProgramFiles%\microsoft office\office12\winword.exe
%ProgramFiles%\microsoft office\office12\powerpnt.exe
%CommonProgramFiles%\microsoft shared\office12\msoxmled.exe
%ProgramFiles%\microsoft office\office12\infopath.exe
%ProgramFiles%\opera\launcher.exe
%TEMP%\pyl1.tmp\bin\7z.exe
%TEMP%\opera installer\opera_ni_stable[1].exe
%TEMP%\pyl1.tmp\bin\cygwin1.dll
%ProgramFiles%\adobe\reader 10.0\reader\acrord32.exe
%HOMEPATH%\my documents\chromesetup (1).exe
%HOMEPATH%\my documents\chromesetup.exe
%HOMEPATH%\my documents\firefox setup 40.0.2 (1).exe
%HOMEPATH%\my documents\firefox setup 40.0.2.exe
%HOMEPATH%\my documents\firefox setup stub 40.0.2.exe
%HOMEPATH%\my documents\icq_rfrset.exe
%HOMEPATH%\my documents\jre-8u60-windows-i586-iftw (1).exe
%HOMEPATH%\my documents\jre-8u60-windows-i586-iftw.exe
%HOMEPATH%\my documents\mirc743.exe
%HOMEPATH%\my documents\pidgin-2.10.11 (1).exe
%HOMEPATH%\my documents\pidgin-2.10.11.exe
%ProgramFiles%\microsoft office\office12\msohtmed.exe
%ProgramFiles%\Microsoft Office\Office12\OIS.EXE
%ProgramFiles%\winrar\winrar.exe
%TEMP%\pyl1.tmp\bin\7z.dll
%TEMP%\opera installer\installer.exe
%HOMEPATH%\my documents\qip2005.exe
%ALLUSERSPROFILE%\application data\package cache\{2af972c7-13b0-4978-92a8-fee26a4fb4e9}\vcredist_x86.exe
%ALLUSERSPROFILE%\application data\package cache\{615bc16d-60f5-482e-91b3-b51d8130963b}\vcredist_x86.exe
%ALLUSERSPROFILE%\application data\package cache\{74d0e5db-b326-4dae-a6b2-445b9de1836e}\vc_redist.x86.exe
%ALLUSERSPROFILE%\application data\package cache\{f0080ca2-80ae-4958-b6eb-e8fa916d744a}\vcredist_x86.exe
%APPDATA%\icqm\icq\dll\mailrusputnik.exe
%APPDATA%\icqm\icq\dll\mousephone.dll
%APPDATA%\icqm\icq\dll\mratag.dll
<Drive name for removable media>:\utorrent.exe
<Drive name for removable media>:\dotnetfx45_full_setup.exe
<Drive name for removable media>:\winmine.exe
<Drive name for removable media>:\wrar520.exe
<Drive name for removable media>:\notepad.exe
<Drive name for removable media>:\skypesetup.exe
%ALLUSERSPROFILE%\application data\package cache\{01db25f3-1b76-4d97-88c8-1c90634d88fb}\vcredist_x86.exe
%APPDATA%\icqm\icqsetup.exe
%APPDATA%\qipguard\chrome.dll
%APPDATA%\qipguard\qipguard.exe
%APPDATA%\qipguard\qipguard_upd.exe
%APPDATA%\qipguard\sqlite3.dll
%APPDATA%\telegram desktop\telegram.exe
%APPDATA%\telegram desktop\unins000.exe
%APPDATA%\telegram desktop\updater.exe
%HOMEPATH%\desktop\calc.exe
%HOMEPATH%\desktop\dotnetfx45_full_setup.exe
%HOMEPATH%\desktop\jre-7u75-windows-i586-iftw.exe
%HOMEPATH%\desktop\notepad.exe
%HOMEPATH%\desktop\utorrent.exe
%TEMP%\7f4987fb1a6e43d69e3e94b29eb75926\yandexsearch.exe
%APPDATA%\icqm\sciter32.dll
%CommonProgramFiles%\adobe air\versions\1.0\adobe air updater.exe
%ProgramFiles%\avpcc\avpcc.exe
%HOMEPATH%\my documents\qip2012.exe
C:\msocache\all users\{90120000-0030-0000-0000-0000000ff1ce}-c\setup.exe
%ProgramFiles%\adobe\reader 10.0\reader\agm.dll
%ProgramFiles%\adobe\reader 10.0\reader\ahclient.dll
%ProgramFiles%\adobe\reader 10.0\reader\air\nppdf32.dll
%ProgramFiles%\adobe\reader 10.0\reader\authplay.dll
%ProgramFiles%\adobe\reader 10.0\reader\axe8sharedexpat.dll
%ProgramFiles%\adobe\reader 10.0\reader\axsle.dll
%ProgramFiles%\adobe\reader 10.0\reader\bib.dll
%ProgramFiles%\adobe\reader 10.0\reader\bibutils.dll
%ProgramFiles%\adobe\reader 10.0\reader\browser\nppdf32.dll
%ProgramFiles%\adobe\reader 10.0\reader\ccme_base.dll
%ProgramFiles%\adobe\reader 10.0\reader\cooltype.dll
%ProgramFiles%\adobe\reader 10.0\reader\adobelinguistic.dll
%ProgramFiles%\adobe\reader 10.0\reader\cryptocme2.dll
%ProgramFiles%\adobe\reader 10.0\reader\adobexmp.dll
%ProgramFiles%\adobe\reader 10.0\reader\extendscript.dll
%ProgramFiles%\adobe\reader 10.0\reader\icudt40.dll
%ProgramFiles%\adobe\reader 10.0\reader\jp2klib.dll
%ProgramFiles%\adobe\reader 10.0\reader\logsession.dll
%ProgramFiles%\adobe\reader 10.0\reader\logtransport2.exe
%ProgramFiles%\adobe\reader 10.0\reader\onix32.dll
%ProgramFiles%\adobe\reader 10.0\reader\pdfprevhndlr.dll
%ProgramFiles%\adobe\reader 10.0\reader\pdfprevhndlrshim.exe
%ProgramFiles%\adobe\reader 10.0\reader\pe.dll
%ProgramFiles%\adobe\reader 10.0\reader\reader_sl.exe
%ProgramFiles%\adobe\reader 10.0\reader\rt3d.dll
%ProgramFiles%\adobe\reader 10.0\reader\sccore.dll
%ProgramFiles%\adobe\reader 10.0\reader\eula.exe
%TEMP%\pyl1.tmp\bin\cpuid.dll
%ProgramFiles%\adobe\reader 10.0\reader\icucnv40.dll
%ProgramFiles%\adobe\reader 10.0\reader\adoberfp.dll
%ProgramFiles%\adobe\reader 10.0\reader\adobecollabsync.exe
%ProgramFiles%\adobe\reader 10.0\reader\acrotextextractor.exe
C:\msocache\all users\{90120000-0115-0409-0000-0000000ff1ce}-c\1033\dwintl20.dll
C:\msocache\all users\{90120000-0115-0409-0000-0000000ff1ce}-c\dw20.exe
C:\msocache\all users\{90120000-0115-0409-0000-0000000ff1ce}-c\dwdcw20.dll
C:\msocache\all users\{90120000-0115-0409-0000-0000000ff1ce}-c\dwtrig20.exe
C:\msocache\all users\{90120000-0115-0409-0000-0000000ff1ce}-c\msvcr80.dll
C:\msocache\all users\{90120000-0115-0409-0000-0000000ff1ce}-c\osetupui.dll
%ProgramFiles%\360tray\360tray.exe
%ProgramFiles%\a2cmd\a2cmd.exe
%ProgramFiles%\a2guard\a2guard.exe
%ProgramFiles%\a2hijackfree\a2hijackfree.exe
%ProgramFiles%\a2scan\a2scan.exe
%ProgramFiles%\a2service\a2service.exe
C:\msocache\all users\{90120000-0030-0000-0000-0000000ff1ce}-c\osetup.dll
%ProgramFiles%\a2start\a2start.exe
%ProgramFiles%\a2wizard\a2wizard.exe
%ProgramFiles%\aavshield\aavshield.exe
%ProgramFiles%\about\about.exe
%ProgramFiles%\ackwin32\ackwin32.exe
%ProgramFiles%\admunch\admunch.exe
%ProgramFiles%\adobe\acrobat.com\acrobat.com.exe
%ProgramFiles%\adobe\reader 10.0\esl\aiodlite.dll
%ProgramFiles%\adobe\reader 10.0\reader\a3dutils.dll
%ProgramFiles%\adobe\reader 10.0\reader\ace.dll
%ProgramFiles%\adobe\reader 10.0\reader\acrobroker.exe
%ProgramFiles%\adobe\reader 10.0\reader\acrofx32.dll
%ProgramFiles%\adobe\reader 10.0\reader\acrord32.dll
%ProgramFiles%\adobe\reader 10.0\reader\acrord32info.exe
%ProgramFiles%\a2upd\a2upd.exe
%ProgramFiles%\adobe\reader 10.0\reader\acrordif.dll
C:\msocache\all users\{90120000-0030-0000-0000-0000000ff1ce}-c\ose.exe
%CommonProgramFiles%\adobe air\versions\1.0\adobe air.dll

Creates the following files on removable media

<Drive name for removable media>:\recycler\s-2-8-30-0443832653-1082772241-241470313-1517\rqhpakza.exe
<Drive name for removable media>:\recycler\s-1-6-38-4276360553-0775184050-173358372-3671\pjknqceg.exe
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\recycler\s-1-6-38-4276360553-0775184050-173358372-3671\ugjysbqd.cpl
<Drive name for removable media>:\guenq.exe
<Drive name for removable media>:\recycler\s-1-6-38-4276360553-0775184050-173358372-3671\fsgoccjy.exe
<Drive name for removable media>:\recycler\s-6-7-40-6756783215-3481635246-852541445-0607\ltdqickq.exe
<Drive name for removable media>:\recycler\s-1-6-38-4276360553-0775184050-173358372-3671\ueqcnttu.cpl

Malicious functions

To bypass firewall, removes or modifies the following registry keys

[<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to file>' = '<Full path to file>:*:Enabled:ipsec'
[<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
[<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
[<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files

blocks the following features:

User Account Control (UAC)
Windows Security Center

Injects code into

the following system processes:

<SYSTEM32>\ctfmon.exe
System
<SYSTEM32>\smss.exe
<SYSTEM32>\csrss.exe
<SYSTEM32>\winlogon.exe
<SYSTEM32>\services.exe
<SYSTEM32>\lsass.exe
<SYSTEM32>\svchost.exe
<SYSTEM32>\spoolsv.exe
%WINDIR%\explorer.exe
<SYSTEM32>\alg.exe

the following user processes:

firefox.exe

Hooks functions

in browsers

firefox.exe process, dnsapi.dll module

Reads files which store third party applications passwords

%HOMEPATH%\desktop\api-hashmap.html
%HOMEPATH%\desktop\browse.htm
%HOMEPATH%\desktop\iisstart.htm
%HOMEPATH%\desktop\iisstart.html
%HOMEPATH%\desktop\ituneshelpunavailable.htm

Modifies file system

Creates the following files

<PATH_SAMPLE>mgr.exe
<PATH_SAMPLE>srv.exe
%ProgramFiles%\microsoft\desktoplayer.exe
<PATH_SAMPLE>.cfg
%ProgramFiles%\mozilla firefox\dmlconf.dat
%TEMP%\winbjkxaq.exe
C:\autorun.inf
C:\kpvcn.pif
D:\autorun.inf
D:\xodm.exe

Sets the 'hidden' attribute to the following files

%HOMEPATH%\start menu\programs\startup\wfifauvs.exe
C:\autorun.inf
C:\kpvcn.pif
D:\autorun.inf
D:\xodm.exe
<Drive name for removable media>:\guenq.exe

Deletes the following files

%TEMP%\winbjkxaq.exe
<Drive name for removable media>:\autorun.inf

Substitutes the following files

<Drive name for removable media>:\autorun.inf

Network activity

UDP

DNS ASK google.com
DNS ASK su###wdmn.com
DNS ASK fg###career.com
DNS ASK bing.com
DNS ASK tv#####nyvwstrtve.com
DNS ASK ya##o.com

Miscellaneous

Searches for the following windows

ClassName: 'SJE_CdPlayerClass' WindowName: ''

Creates and executes the following

'<PATH_SAMPLE>mgr.exe'
'<PATH_SAMPLE>srv.exe'
'%ProgramFiles%\microsoft\desktoplayer.exe'

Executes the following

'%ProgramFiles%\mozilla firefox\firefox.exe'

Technologies

Terminology

Training and education

Myths

Technical Information

Curing recommendations

Free trial