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Profile

BackDoor.Zegost

Added to the Dr.Web virus database: 2010-07-27

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\AudioSrv] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
  • C:\hgbxxidciv -s<Full path to virus>
Modifies file system :
Creates the following files:
  • <SYSTEM32>\51e92691.rdb
  • %TEMP%\<Virus name>.jpg
  • <SYSTEM32>\bjjxegykwj
  • C:\hgbxxidciv
  • <Current directory>\yldbbknop
  • %TEMP%\wsxxnemgvg.dat
Deletes the following files:
  • <SYSTEM32>\bjjxegykwj
  • C:\hgbxxidciv
  • <Current directory>\yldbbknop
Deletes itself.
Network activity:
Connects to:
  • 'ba#####uwxfj.gnway.net':618
UDP:
  • DNS ASK up###e.nai.com
  • DNS ASK gu##.avg.com
  • DNS ASK ka#####ky.fastcdn.com
  • DNS ASK su####t.eset.com.cn
  • DNS ASK gt###nt.avg.com
  • DNS ASK gt###kg.avg.com
  • DNS ASK mm#.#xplabs.net
  • DNS ASK gt###yc.avg.com
  • DNS ASK gt####lf.avg.com
  • DNS ASK hd.#uba.net
  • DNS ASK www.ri###g.com.cn
  • DNS ASK f-####s.duba.net
  • DNS ASK ap#.#c120.com
  • DNS ASK z.###ing.com.cn
  • DNS ASK re#####.rising.com.cn
  • DNS ASK rs######to.rising.com.cn
  • DNS ASK rs######ad.rising.com.cn
  • DNS ASK ms#####.rising.com.cn
  • DNS ASK u1.##et.com.cn
  • DNS ASK um##.eset.com
  • DNS ASK 08#####e1.jiangmin.com
  • DNS ASK ex###.eset.com
  • DNS ASK do#######2.kaspersky-labs.com
  • DNS ASK do#######3.kaspersky-labs.com
  • DNS ASK 08#####e3.jiangmin.com
  • DNS ASK 08#####e2.jiangmin.com
  • DNS ASK u2.##et.com.cn
  • DNS ASK ia#.###ndmicro.com.cn
  • DNS ASK dn####.#eo.kaspersky.com
  • DNS ASK li########.symantecliveupdate.com
  • DNS ASK ll###.avast.com
  • DNS ASK rs###.rising.com.cn
  • DNS ASK do#######1.kaspersky-labs.com
  • DNS ASK up#####.jiangmin.com
  • DNS ASK cu###.www.duba.net
  • DNS ASK cs#.#uba.net
  • DNS ASK qd.###e.qihoo.com
  • DNS ASK st##.#60safe.com
  • DNS ASK sd###.360.cn
  • DNS ASK qd.##de.360.cn
  • DNS ASK st####.360safe.com
  • DNS ASK tr.#.360.cn
  • DNS ASK up####h.360safe.com
  • DNS ASK up####.360safe.com
  • DNS ASK up#####s.360safe.com
  • DNS ASK qu#.#.360.cn
  • DNS ASK u.###l.f.360.cn
  • DNS ASK co##.f.360.cn
  • DNS ASK ba#####uwxfj.gnway.net
  • DNS ASK qu##.f.360.cn
  • DNS ASK sd##.360.cn
  • DNS ASK sd##.qh-lb.com
  • DNS ASK qu##.qh-lb.com
  • DNS ASK qu#.#h-lb.com
  • DNS ASK f-##.beike.cn
  • DNS ASK www.be##e.cn
  • DNS ASK an#####.db.kingsoft.com
  • DNS ASK bo.#uba.net
  • DNS ASK vc##.beike.cn
  • DNS ASK if#.#uba.net
  • DNS ASK vi.##120.com
  • DNS ASK pu##.#ww.duba.net
  • DNS ASK www.du##.net
  • DNS ASK sd#.#60safe.com
  • DNS ASK dl.##0safe.com
  • DNS ASK w.##0.cn
  • DNS ASK st##.sd.360.cn
  • DNS ASK dl.##-lb.com
  • DNS ASK so###.##date.360safe.com
  • DNS ASK so#####.update.360safe.com
  • DNS ASK www.36#.cn
  • DNS ASK www.36##afe.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'ShImgVw:CPreviewWnd' 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