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Trojan.Siggen5.25626

Added to the Dr.Web virus database: 2013-05-23

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MciGkrwk' = '<LS_APPDATA>\eyqtaont\mcigkrwk.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,,<LS_APPDATA>\eyqtaont\mcigkrwk.exe'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\mcigkrwk.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks the following features:
  • User Account Control (UAC)
  • Windows Security Center
Creates and executes the following:
  • '%TEMP%\ekdbmtyq.exe' admin
  • '%TEMP%\ekdbmtyq.exe' elevate
Executes the following:
  • '<SYSTEM32>\svchost.exe'
Hooks the following functions in System Service Descriptor Table (SSDT):
  • NtOpenKey, handler: tqgnnosw.sys
  • NtCreateKey, handler: tqgnnosw.sys
Modifies file system :
Creates the following files:
  • %TEMP%\tqgnnosw.sys
  • %WINDIR%\Temp\6decd52f
  • %WINDIR%\Temp\7fffffb1
  • <LS_APPDATA>\eyqtaont\mcigkrwk.exe
  • %TEMP%\ekdbmtyq.exe
  • %ALLUSERSPROFILE%\Application Data\bjdwbfvf.log
  • <LS_APPDATA>\niuydqre.log
Sets the 'hidden' attribute to the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\mcigkrwk.exe
Deletes the following files:
  • %TEMP%\tqgnnosw.sys
Network activity:
Connects to:
  • 'po####jnvfauh.com':443
  • 'vo#####uxkkmhbmuac.com':443
  • '74.##5.232.51':80
  • 'ma###rada.com':443
UDP:
  • DNS ASK be###ootil.com
  • DNS ASK bw#####maylcusgj.com
  • DNS ASK yj###uva.com
  • DNS ASK el#####qujjsojmx.com
  • DNS ASK qv###knv.com
  • DNS ASK ch#####jcohrghodar.com
  • DNS ASK gn#####dxnwrwqkwpp.com
  • DNS ASK wd####rgmluxb.com
  • DNS ASK qp###xefbxv.com
  • DNS ASK nd###gecu.com
  • DNS ASK nd####elkoxl.com
  • DNS ASK jd###bvkleb.com
  • DNS ASK qw###ygxhjr.com
  • DNS ASK ku###cqp.com
  • DNS ASK lu#####xfwyjlpnpig.com
  • DNS ASK jm#####pmvbliuoqw.com
  • DNS ASK cs#####weytrimmb.com
  • DNS ASK fp####oxhcajs.com
  • DNS ASK dq####ddwvllihp.com
  • DNS ASK ej###jdfvkh.com
  • DNS ASK dv###yqhomu.com
  • DNS ASK mr####oxjgrnqm.com
  • DNS ASK ah####mbxjqjon.com
  • DNS ASK rd####tsxxsvkj.com
  • DNS ASK ya##o.com
  • DNS ASK rd###uyxkh.com
  • DNS ASK rd###vyaon.com
  • DNS ASK ha#####acvhhmngyg.com
  • DNS ASK ps###fybl.com
  • DNS ASK sq####wlslkv.com
  • DNS ASK dl#####nvmmgtngihh.com
  • DNS ASK sx#####caaprwyocm.com
  • DNS ASK nv#####shkovbheq.com
  • DNS ASK kg####ycaynei.com
  • DNS ASK ep#####qkbedarpd.com
  • DNS ASK er###tbw.com
  • DNS ASK eq###gxi.com
  • DNS ASK ic###lgk.com
  • DNS ASK ku####lhpqfxv.com
  • DNS ASK tn#####xenaqbdtavwq.com
  • DNS ASK bj###dybgv.com
  • DNS ASK rn#####hmhcuewwvm.com
  • DNS ASK cx#####phvqlduqqj.com
  • DNS ASK er###nya.com
  • DNS ASK sl#####uwfxnfweg.com
  • DNS ASK ta####oqnuhxe.com
  • DNS ASK uw#####ixgltepqsfv.com
  • DNS ASK sd###kbhsk.com
  • DNS ASK ku####glgmou.com
  • DNS ASK th###fxfgq.com
  • DNS ASK ey#####lecqsgdghv.com
  • DNS ASK je#####otxdmsdii.com
  • DNS ASK pj#####olyjcktcrt.com
  • DNS ASK ji#####jbrmwcvux.com
  • DNS ASK vk####rosfly.com
  • DNS ASK kg#####ntvypekpui.com
  • DNS ASK xd###topx.com
  • DNS ASK mw###cio.com
  • DNS ASK eq####khtelypr.com
  • DNS ASK gd###inrnck.com
  • DNS ASK sc###oelqc.com
  • DNS ASK ea#####dokkgarfmuj.com
  • DNS ASK ai####uwohodb.com
  • DNS ASK yw####ahywcmub.com
  • DNS ASK cq####ajfpumhco.com
  • DNS ASK ys####ufhioygn.com
  • DNS ASK oq####udrctwy.com
  • DNS ASK uf###werdk.com
  • DNS ASK cw####vnopquj.com
  • DNS ASK cq####etbxkk.com
  • DNS ASK ek#####rwtnmkrgo.com
  • DNS ASK gl###fkwxhe.com
  • DNS ASK la###ffr.com
  • DNS ASK wf###jxywb.com
  • DNS ASK gm#####jcwvaidubfha.com
  • DNS ASK fm####ycqcllrql.com
  • DNS ASK fb####kvhcgp.com
  • DNS ASK ot####ndkmwgak.com
  • DNS ASK lq#####thqejaosnm.com
  • DNS ASK vu####bqnuot.com
  • DNS ASK qb#####jlbetfrjfh.com
  • DNS ASK iu####gmqgyf.com
  • DNS ASK we####bsrjjf.com
  • DNS ASK mr###wva.com
  • DNS ASK of###xwx.com
  • DNS ASK vd####rwmhpvtw.com
  • DNS ASK pe####kmewcix.com
  • DNS ASK aa####jyvxlosy.com
  • DNS ASK aj###vwcsnp.com
  • DNS ASK yy####ghkfwqpyq.com
  • DNS ASK tu####asasucgkv.com
  • DNS ASK su#####rwhjfxdqbt.com
  • DNS ASK xp###lpguj.com
  • DNS ASK qu###xiga.com
  • DNS ASK fo#####ykmdxodav.com
  • DNS ASK sd####lyavjif.com
  • DNS ASK ma###rada.com
  • DNS ASK google.com
  • DNS ASK vo#####uxkkmhbmuac.com
  • DNS ASK po####jnvfauh.com
  • DNS ASK er###qeq.com
  • DNS ASK ov###fobf.com
  • DNS ASK wv#####liuqbakkxry.com
  • DNS ASK oq####sfugms.com
  • DNS ASK ii###gbo.com
  • DNS ASK de#####paoywbeccng.com
  • DNS ASK la###jvqc.com
  • DNS ASK gx###jxn.com
  • DNS ASK bj###vngsn.com
  • DNS ASK si####sxureorb.com
  • DNS ASK dp####aikowymh.com
  • DNS ASK xl####tggmabhpp.com
  • DNS ASK ox###xtyyr.com
  • DNS ASK py####pajlxoeoc.com
  • DNS ASK gc###bgura.com
  • DNS ASK iw###pbwppg.com
  • DNS ASK ke####bypwgfqyg.com
  • DNS ASK oo####wmyxunlr.com
  • DNS ASK bing.com
  • DNS ASK oq####mhigjfw.com
  • DNS ASK br####kmgndn.com
  • DNS ASK ec###nbib.com
  • DNS ASK ge###kyac.com
  • DNS ASK cy#####pqdllvrxqu.com
  • DNS ASK ip#####knysfvomq.com
  • DNS ASK yc####htqeenpso.com
  • DNS ASK wg###cdb.com
  • DNS ASK kb###agf.com
  • DNS ASK pq#####thkuhlyoycp.com
  • DNS ASK vk####pjiqwejsv.com
  • DNS ASK xa####olgpym.com
  • DNS ASK il#####vfabsxnodio.com
  • DNS ASK ib#####odpyxmfhyk.com
  • DNS ASK hx###cpwyxh.com
  • DNS ASK sv####vugdxo.com
  • DNS ASK fy#####lnlaedmnew.com
  • DNS ASK ri###mncox.com
  • DNS ASK mq####itbbak.com
  • DNS ASK bg#####pdfqnqppg.com
  • DNS ASK da###lbs.com
  • DNS ASK kx#####oqnlfwfvisbb.com
  • DNS ASK go####gvolnkcpo.com
  • DNS ASK bg###vwufi.com
  • DNS ASK wv####xvdjag.com
  • DNS ASK rb###ssmhcx.com
  • DNS ASK kp###ugumx.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''
  • ClassName: '' WindowName: ''

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
Download Dr.Web

Download by serial number

Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

Download Dr.Web

Download by serial number

  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

Find out more about Dr.Web for Android