Trojan.Win32.Nedsym_8d3b36d94a

by malwarelabrobot on January 3rd, 2014 in Malware Descriptions.

Trojan.Generic.KD.792054 (BitDefender), VirTool:Win32/CeeInject.gen!ID (Microsoft), Trojan-Dropper.Win32.Dapato.bxfe (Kaspersky), Trojan.Win32.Encpk_afnc (v) (VIPRE), Trojan.DownLoader6.56603 (DrWeb), PWS-Zbot.gen.anm (McAfee), Trojan.Gen (Symantec), Trojan.Crypt (Ikarus), Trojan.Generic.KD.792054 (FSecure), Dropper.Generic7.MRJ (AVG), Win32:Injector-AWW [Trj] (Avast), TROJ_SPNR.15L712 (TrendMicro), Trojan.Win32.Nedsym.FD, TrojanNedsym.YR (Lavasoft MAS)
Behaviour: Trojan-Dropper, Trojan, VirTool


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Removal Recommendations

MD5: 8d3b36d94a1fb93db2d19bf8e08c2446
SHA1: 404ee2d63b559d167b3cf15e8f09e10345a510c8
SHA256: 11e60b58f1d8697b84e178ee28b8e64f051ab55e848bb88f6dfcda6cf38e8844
SSDeep: 3072:bMbTOMnP9vDTXRQo4xR8rrCTk6x4/qEj7kleab:bMfOMPoL2aP2yEXk7
Size: 102759 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: NBIZ Corp.
Created at: 2012-11-19 18:00:23
Analyzed on: WindowsXP SP3 32-bit


Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

svcnost.exe:496
%original file name%.exe:1124

The Trojan injects its code into the following process(es):

svcnost.exe:1704

File activity

The process svcnost.exe:1704 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\ntuser.dat (55 bytes)
%Documents and Settings%\%current user%\Application Data\desktop.ini (9 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Application Data\desktop.ini (0 bytes)

The process %original file name%.exe:1124 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%System%\drivers\etc\hosts (5 bytes)

The Trojan deletes the following file(s):

%System%\drivers\etc\hosts (0 bytes)

Registry activity

The process svcnost.exe:1704 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "67 74 91 A1 39 20 7B 13 88 1D AB E4 B5 4E 83 26"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\Microsoft\Internet Explorer\LowRegistry]
"SavedLegacySettingsML" = "35 36 37 31 34 38 36 39 37"

Adds a rule to the firewall Windows which allows any network activity:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\c:\documents and settings\"%CurrentUserName%"\application data\xojskzqqqecai1ym3ooro13acex3efbw2]
"svcnost.exe" = "c:\documents and settings\"%CurrentUserName%"\application data\xojskzqqqecai1ym3ooro13acex3efbw2\svcnost.exe:*:Enabled:ldrsoft"

The process %original file name%.exe:1124 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Windows Init" = "%Documents and Settings%\%current user%\Application Data\xojskzqqqecai1ym3ooro13acex3efbw2\svcnost.exe"

Network activity (URLs)

No activity has been detected.

HOSTS file anomalies

The Trojan modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses.
The modified file is 5915 bytes in size. The following strings are added to the hosts file listed below:

127.0.0.1 downloads4.kaspersky-labs.com
127.0.0.1 downloads3.kaspersky-labs.com
127.0.0.1 downloads2.kaspersky-labs.com
127.0.0.1 downloads1.kaspersky-labs.com
127.0.0.1 downloads-us1.kaspersky-labs.com
127.0.0.1 rads.mcafee.com
127.0.0.1 www.secuser.com
127.0.0.1 a188.x.akamai.net
127.0.0.1 liveupdate.symantecliveupdate.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 liveupdate.symantec.d4p.net
127.0.0.1 update.symantec.com
127.0.0.1 ftp.nai.com
127.0.0.1 www.grisoft.cz
127.0.0.1 www.grisoft.com
127.0.0.1 free.grisoft.cz
127.0.0.1 tds.diamondcs.com.au
127.0.0.1 ieupdate.gdata.de
127.0.0.1 ieupdate6.gdata.de
127.0.0.1 ieupdate5.gdata.de
127.0.0.1 ieupdate4.gdata.de
127.0.0.1 ieupdate3.gdata.de
127.0.0.1 ieupdate2.gdata.de
127.0.0.1 ieupdate1.gdata.de
127.0.0.1 www.iavs.cz
127.0.0.1 download7.avast.com
127.0.0.1 download6.avast.com
127.0.0.1 download5.avast.com
127.0.0.1 download4.avast.com
127.0.0.1 download3.avast.com
127.0.0.1 download2.avast.com
127.0.0.1 download1.avast.com
127.0.0.1 upgrade.bitdefender.com
127.0.0.1 windowsupdate.microsoft.com
127.0.0.1 www.lavasoftusa.com
127.0.0.1 www.a-2.org
127.0.0.1 updates.a-2.org
127.0.0.1 niuone.norman.no
127.0.0.1 www.diamondcs.com.au
127.0.0.1 www.attechnical.com
127.0.0.1 www.zeylstra.nl
127.0.0.1 fractus.mat.uson.mx
127.0.0.1 www.toonbox.de
127.0.0.1 radius.turvamies.com
127.0.0.1 diamondcs.fileburst.com
127.0.0.1 downloads.My-eTrust.com
127.0.0.1 acs.pandasoftware.com
127.0.0.1 v4.windowsupdate.microsoft.com
127.0.0.1 www.NoAdware.net
127.0.0.1 www.nod32.com
127.0.0.1 www.eset.sk
127.0.0.1 avu.zonelabs.com
127.0.0.1 retail.sp.f-secure.com
127.0.0.1 retail01.sp.f-secure.com
127.0.0.1 retail02.sp.f-secure.com
127.0.0.1 www.moosoft.com
127.0.0.1 secuser.model-fx.com
127.0.0.1 secuser.com
127.0.0.1 downloads-eu1.kaspersky-labs.com
127.0.0.1 downloads2.kaspersky-labs.com
127.0.0.1 downloads4.kaspersky-labs.com
127.0.0.1 downloads1.kaspersky-labs.com
127.0.0.1 pccreg.antivirus.com
127.0.0.1 dl1.antivir.de
127.0.0.1 dl2.antivir.de
127.0.0.1 dl3.antivir.de
127.0.0.1 dl4.antivir.de
127.0.0.1 ad.doubleclick.net
127.0.0.1 ad.fastclick.net
127.0.0.1 ads.fastclick.net
127.0.0.1 ar.atwola.com
127.0.0.1 atdmt.com
127.0.0.1 avp.ch
127.0.0.1 avp.com
127.0.0.1 avp.com
127.0.0.1 avp.ru
127.0.0.1 awaps.net
127.0.0.1 banner.fastclick.net
127.0.0.1 banners.fastclick.net
127.0.0.1 ca.com
127.0.0.1 ca.com
127.0.0.1 click.atdmt.com
127.0.0.1 clicks.atdmt.com
127.0.0.1 customer.symantec.com
127.0.0.1 dispatch.mcafee.com
127.0.0.1 dispatch.mcafee.com
127.0.0.1 download.mcafee.com
127.0.0.1 download.mcafee.com
127.0.0.1 download.mcafee.com
127.0.0.1 download.microsoft.com
127.0.0.1 downloads.microsoft.com
127.0.0.1 downloads1.kaspersky-labs.com
127.0.0.1 downloads1.kaspersky-labs.com
127.0.0.1 downloads1.kaspersky-labs.com
127.0.0.1 downloads2.kaspersky-labs.com
127.0.0.1 downloads3.kaspersky-labs.com
127.0.0.1 downloads4.kaspersky-labs.com
127.0.0.1 downloads-us1.kaspersky-labs.com
127.0.0.1 downloads-us2.kaspersky-labs.com
127.0.0.1 downloads-us3.kaspersky-labs.com
127.0.0.1 engine.awaps.net
127.0.0.1 fastclick.net
127.0.0.1 f-secure.com
127.0.0.1 f-secure.com
127.0.0.1 ftp.avp.ch
127.0.0.1 ftp.downloads2.kaspersky-labs.com
127.0.0.1 ftp.f-secure.com
127.0.0.1 ftp.kasperskylab.ru
127.0.0.1 ftp.sophos.com
127.0.0.1 go.microsoft.com
127.0.0.1 ids.kaspersky-labs.com
127.0.0.1 kaspersky.com
127.0.0.1 kaspersky-labs.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 liveupdate.symantec.com
127.0.0.1 liveupdate.symantecliveupdate.com
127.0.0.1 liveupdate.symantecliveupdate.com
127.0.0.1 mast.mcafee.com
127.0.0.1 mast.mcafee.com
127.0.0.1 mcafee.com
127.0.0.1 mcafee.com
127.0.0.1 media.fastclick.net
127.0.0.1 msdn.microsoft.com
127.0.0.1 my-etrust.com
127.0.0.1 my-etrust.com
127.0.0.1 nai.com
127.0.0.1 nai.com
127.0.0.1 networkassociates.com
127.0.0.1 networkassociates.com
127.0.0.1 office.microsoft.com
127.0.0.1 phx.corporate-ir.net
127.0.0.1 rads.mcafee.com
127.0.0.1 secure.nai.com
127.0.0.1 secure.nai.com
127.0.0.1 securityresponse.symantec.com
127.0.0.1 securityresponse.symantec.com
127.0.0.1 service1.symantec.com
127.0.0.1 sophos.com
127.0.0.1 sophos.com
127.0.0.1 spd.atdmt.com
127.0.0.1 support.microsoft.com
127.0.0.1 symantec.com
127.0.0.1 symantec.com
127.0.0.1 trendmicro.com
127.0.0.1 update.symantec.com
127.0.0.1 update.symantec.com
127.0.0.1 update.symantec.com
127.0.0.1 updates.symantec.com
127.0.0.1 updates.symantec.com
127.0.0.1 updates1.kaspersky-labs.com
127.0.0.1 updates1.kaspersky-labs.com
127.0.0.1 updates2.kaspersky-labs.com
127.0.0.1 updates3.kaspersky-labs.com
127.0.0.1 updates3.kaspersky-labs.com
127.0.0.1 updates4.kaspersky-labs.com
127.0.0.1 updates5.kaspersky-labs.com
127.0.0.1 us.mcafee.com
127.0.0.1 us.mcafee.com
127.0.0.1 vil.nai.com
127.0.0.1 viruslist.com
127.0.0.1 viruslist.ru
127.0.0.1 windowsupdate.microsoft.com
127.0.0.1 www.avp.ch
127.0.0.1 www.avp.com
127.0.0.1 www.avp.com
127.0.0.1 www.avp.ru
127.0.0.1 www.awaps.net
127.0.0.1 www.ca.com
127.0.0.1 www.ca.com
127.0.0.1 www.fastclick.net
127.0.0.1 www.f-secure.com
127.0.0.1 www.f-secure.com
127.0.0.1 www.grisoft.com
127.0.0.1 www.kaspersky.com
127.0.0.1 www.kaspersky.ru
127.0.0.1 www.kaspersky.ru
127.0.0.1 www.kaspersky-labs.com
127.0.0.1 www.mcafee.com
127.0.0.1 www.mcafee.com
127.0.0.1 www.my-etrust.com
127.0.0.1 www.my-etrust.com
127.0.0.1 www.nai.com
127.0.0.1 www.nai.com
127.0.0.1 www.networkassociates.com
127.0.0.1 www.networkassociates.com
127.0.0.1 www.sophos.com
127.0.0.1 www.sophos.com
127.0.0.1 www.symantec.com
127.0.0.1 www.symantec.com
127.0.0.1 www.trendmicro.com
127.0.0.1 www.trendmicro.com
127.0.0.1 www.viruslist.com
127.0.0.1 www.viruslist.ru


Rootkit activity

No anomalies have been detected.

Propagation


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):

    svcnost.exe:496
    %original file name%.exe:1124

  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Application Data\ntuser.dat (55 bytes)
    %Documents and Settings%\%current user%\Application Data\desktop.ini (9 bytes)
    %System%\drivers\etc\hosts (5 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "Windows Init" = "%Documents and Settings%\%current user%\Application Data\xojskzqqqecai1ym3ooro13acex3efbw2\svcnost.exe"

  5. Restore the original content of the HOSTS file (%System%\drivers\etc\hosts):
    127.0.0.1 localhost
  6. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.