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Trojan.DownLoader7.16263

Added to the Dr.Web virus database: 2012-11-02

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
  • <Current directory>\AJNla23
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
  • <LS_APPDATA>\eyqtaont\mcigkrwk.exe
  • %WINDIR%\Temp\7fffffb1
  • %WINDIR%\Temp\6decd52f
  • %TEMP%\ekdbmtyq.exe
  • <Current directory>\AJNla23
  • <LS_APPDATA>\niuydqre.log
  • %ALLUSERSPROFILE%\Application Data\bjdwbfvf.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:
  • 'ji####yxjibyd.com':443
  • 'tf###oingy.com':443
  • 'sw###olov.com':443
  • 'kh#####kbwhfdiufhaj.com':443
  • '74.##5.232.51':80
UDP:
  • DNS ASK rr###trt.com
  • DNS ASK ks####hbmctx.com
  • DNS ASK nw#####ynypuhbpkpx.com
  • DNS ASK qx####scxhradd.com
  • DNS ASK ld###wwwgw.com
  • DNS ASK eo####abjwow.com
  • DNS ASK ka#####swjvqgdso.com
  • DNS ASK ry####smekfu.com
  • DNS ASK nj####isfxnxw.com
  • DNS ASK ku#####xrlyrbffu.com
  • DNS ASK mi####cwjddy.com
  • DNS ASK ln###rnhb.com
  • DNS ASK fj###qbvoae.com
  • DNS ASK ft####jkomqdw.com
  • DNS ASK tt####oohhkrhl.com
  • DNS ASK yb###abknhn.com
  • DNS ASK pv###jpvih.com
  • DNS ASK sh####mbrgcqoeh.com
  • DNS ASK da#####mpfufkvaa.com
  • DNS ASK rb#####qgsmmnnvfv.com
  • DNS ASK jp#####akusewlaqfdt.com
  • DNS ASK bing.com
  • DNS ASK kb###dsc.com
  • DNS ASK an####ojndegpnm.com
  • DNS ASK nk###xbt.com
  • DNS ASK ap###ackpqd.com
  • DNS ASK xj#####hxpfekmlcwv.com
  • DNS ASK wg###ijomue.com
  • DNS ASK ri####ielwbe.com
  • DNS ASK cl#####ixpqmyspofp.com
  • DNS ASK yp###sqx.com
  • DNS ASK ga###ccnb.com
  • DNS ASK le####tmbnofr.com
  • DNS ASK ot####jwjvcno.com
  • DNS ASK om###oghcqw.com
  • DNS ASK ox###dxd.com
  • DNS ASK ci#####keaojdxcxu.com
  • DNS ASK ta#####luhhediie.com
  • DNS ASK ie####ccgyvca.com
  • DNS ASK pq#####ftjalqahlo.com
  • DNS ASK xt#####qjrckayml.com
  • DNS ASK ri####rjqsnw.com
  • DNS ASK jm#####clkxellkxgn.com
  • DNS ASK xp#####pcgatgypiepg.com
  • DNS ASK hr####isqjtadka.com
  • DNS ASK ya##o.com
  • DNS ASK gg#####urkffvsfxxdh.com
  • DNS ASK me#####cqxdvseeesd.com
  • DNS ASK hb###hxcf.com
  • DNS ASK xh###wpga.com
  • DNS ASK ia####mfylemjyq.com
  • DNS ASK gj####rakldhem.com
  • DNS ASK gm###efkqm.com
  • DNS ASK nd#####nkplaavqsfa.com
  • DNS ASK mu####pvxvrq.com
  • DNS ASK go#####vwvgqlretxd.com
  • DNS ASK em#####wjuvvsvrwj.com
  • DNS ASK qb###pyyooh.com
  • DNS ASK vr####jxorlyen.com
  • DNS ASK vw####yyutodtr.com
  • DNS ASK nv###npx.com
  • DNS ASK xw####iqjdsxk.com
  • DNS ASK ld####dyyxacm.com
  • DNS ASK ku###xnntsk.com
  • DNS ASK du#####abkuappgqxhp.com
  • DNS ASK vo###yqdinl.com
  • DNS ASK nc#####piawmchfylsy.com
  • DNS ASK ji####yxjibyd.com
  • DNS ASK tf###oingy.com
  • DNS ASK uk####gdbdkd.com
  • DNS ASK kh#####kbwhfdiufhaj.com
  • DNS ASK google.com
  • DNS ASK sw###olov.com
  • DNS ASK sn#####gcwgaafbtqkt.com
  • DNS ASK ht#####rhtchwlhwklf.com
  • DNS ASK ub####qslhqyy.com
  • DNS ASK ca###lnlrou.com
  • DNS ASK ti####axvmhsxtk.com
  • DNS ASK cx#####efolgkokdqy.com
  • DNS ASK ou###vkvn.com
  • DNS ASK ls#####qxvmogvxifm.com
  • DNS ASK de###mdyvt.com
  • DNS ASK hn#####vhxvuoeuap.com
  • DNS ASK fx###tgx.com
  • DNS ASK sj###aml.com
  • DNS ASK sp####davslss.com
  • DNS ASK hc###nlr.com
  • DNS ASK rx###xbkc.com
  • DNS ASK mv#####wfkayjrqfni.com
  • DNS ASK nh####gxtgrnk.com
  • DNS ASK kt###ueyc.com
  • DNS ASK wa#####mnswdmbuhcn.com
  • DNS ASK gy####siciis.com
  • DNS ASK ex#####uxrdvhijan.com
  • DNS ASK ya###fejdxs.com
  • DNS ASK ye#####bbprvybwqn.com
  • DNS ASK oc###ffwnj.com
  • DNS ASK pp####dwufrb.com
  • DNS ASK tf####kcgigiey.com
  • DNS ASK pg###yurf.com
  • DNS ASK pu#####fuxgquhguye.com
  • DNS ASK ga###slj.com
  • DNS ASK jp####bipilmwsc.com
  • DNS ASK mf###hnjp.com
  • DNS ASK cp#####hyrueqcyxnvo.com
  • DNS ASK bx###oxw.com
  • DNS ASK gv###sip.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' 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.
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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