BackDoor.Zegost.100

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:\gbygbjdusw -s<Full path to virus>

Modifies file system :

Creates the following files:

<SYSTEM32>\51e92691.rdb
<SYSTEM32>\xaohbdlepb
%TEMP%\lfhhhncdrw.dat
C:\gbygbjdusw
<Current directory>\gdlbyfkcs

Deletes the following files:

<SYSTEM32>\xaohbdlepb
C:\gbygbjdusw
<Current directory>\gdlbyfkcs

Deletes itself.

Network activity:

Connects to:

'a4####25.6600.org':10886

UDP:

DNS ASK rs######to.rising.com.cn
DNS ASK ka#####ky.fastcdn.com
DNS ASK ms#####.rising.com.cn
DNS ASK re#####.rising.com.cn
DNS ASK gu##.avg.com
DNS ASK gt###nt.avg.com
DNS ASK su####t.eset.com.cn
DNS ASK up###e.nai.com
DNS ASK rs######ad.rising.com.cn
DNS ASK vi.##120.com
DNS ASK f-####s.duba.net
DNS ASK www.du##.net
DNS ASK if#.#uba.net
DNS ASK www.ri###g.com.cn
DNS ASK z.###ing.com.cn
DNS ASK ap#.#c120.com
DNS ASK hd.#uba.net
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 u1.##et.com.cn
DNS ASK um##.eset.com
DNS ASK 08#####e1.jiangmin.com
DNS ASK ex###.eset.com
DNS ASK rs###.rising.com.cn
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 ia#.###ndmicro.com.cn
DNS ASK dn####.#eo.kaspersky.com
DNS ASK li########.symantecliveupdate.com
DNS ASK ll###.avast.com
DNS ASK pu##.#ww.duba.net
DNS ASK qd.##de.360.cn
DNS ASK qd.###e.qihoo.com
DNS ASK sd##.qh-lb.com
DNS ASK sd###.360.cn
DNS ASK up####.360safe.com
DNS ASK up#####s.360safe.com
DNS ASK st##.#60safe.com
DNS ASK st####.360safe.com
DNS ASK qu#.#.360.cn
DNS ASK u.###l.f.360.cn
DNS ASK a4####25.6600.org
DNS ASK co##.f.360.cn
DNS ASK qu#.#h-lb.com
DNS ASK sd##.360.cn
DNS ASK qu##.f.360.cn
DNS ASK qu##.qh-lb.com
DNS ASK so#####.update.360safe.com
DNS ASK an#####.db.kingsoft.com
DNS ASK www.36##afe.com
DNS ASK so###.##date.360safe.com
DNS ASK www.be##e.cn
DNS ASK vc##.beike.cn
DNS ASK bo.#uba.net
DNS ASK f-##.beike.cn
DNS ASK w.##0.cn
DNS ASK st##.sd.360.cn
DNS ASK tr.#.360.cn
DNS ASK up####h.360safe.com
DNS ASK www.36#.cn
DNS ASK dl.##-lb.com
DNS ASK sd#.#60safe.com
DNS ASK dl.##0safe.com
'<Private IP address>':1033
'<Private IP address>':1034

Curing recommendations

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.
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.

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Download Dr.Web

Download by serial number

Download on App Store

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

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Download Dr.Web

Download by serial number

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.
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.

Technologies

Terminology

Training and education

Myths

Technical Information

Curing recommendations

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