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Trojan.DownLoader10.25158

Added to the Dr.Web virus database: 2013-10-08

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\software\Wow6432Node\microsoft\windows\currentversion\run] 'wuaucldt' = '<SYSTEM32>\wuaucldt.exe'
  • [<HKCU>\software\microsoft\windows\currentversion\run] 'wuaucldt' = '%HOMEPATH%\wuaucldt.exe'
Malicious functions
Injects code into
the following system processes:
  • %WINDIR%\syswow64\svchost.exe
Modifies file system
Creates the following files
  • %WINDIR%\syswow64\wuaucldt.exe
  • %HOMEPATH%\wuaucldt.exe
Deletes the following files
  • %WINDIR%\syswow64\wuaucldt.exe
Deletes itself.
Network activity
Connects to
  • '70.##.100.242':443
  • '20#.#10.80.35':443
  • '20#.#14.40.79':443
  • 'mi#####ibiotec.co.jp':443
  • '20#.#10.80.34':443
  • 'aa##d.jp':443
  • '<LOCALNET>.34.54':443
  • '82.##3.122.190':443
  • 'di####.ips.co.jp':443
  • '21#.#57.5.25':443
  • 'im#####olheados.com.br':443
  • '14#.#77.205.56':443
  • '21#.#47.30.22':443
  • 'di###er.com.br':443
  • '20#.#0.45.207':443
  • 'ss#.#ukro.ua':443
  • '20#.#18.170.179':443
  • '21#.#33.134.87':443
  • '20#.#10.80.36':443
  • '16#.#09.180.1':443
  • '21#.#2.72.183':443
  • '20#.#18.111.122':443
  • 'im###ca.com.br':443
  • '20#.#6.50.168':443
  • '62.##9.23.110':443
  • '74.#22.4.12':443
  • '21#.#71.131.16':443
  • 'm-####.lib.meiji.ac.jp':443
  • 'tr######islandcasino.com.ua':443
  • 'ka###a.co.jp':443
  • '77.##0.104.50':443
  • '20#.#92.143.87':443
  • 'ir.####shima-u.ac.jp':443
  • 'ml#.co.jp':443
  • '12#.#3.25.30':443
  • '79.##1.122.236':443
  • 'wo#.##rlin.org.ua':443
  • 'ac#####s.comodo.od.ua':443
  • '13#.#9.92.68':443
  • '70.##.100.244':443
  • 'ss#.##rm-mailer.jp':443
  • 'sa#####garias.com.br':443
  • 'fo##.cao.go.jp':443
  • 'ss#.#oressl.jp':443
  • 'g1##.#ecure.ne.jp':443
  • 'it#####.smartseminar.jp':443
  • 'ma####key.com.ua':443
  • '77.##0.121.35':443
  • '11#.#25.150.227':443
  • '64.##1.68.169':443
  • '21#.#9.163.41':443
  • '20#.#80.136.89':443
  • '19#.#5.154.4':443
  • '21#.#11.198.59':443
  • '20#.#34.192.141':443
  • '20#.#91.113.9':443
  • '91.##3.146.30':443
  • '19#.#82.192.2':443
  • 'bu###r.org.ua':443
  • '21#.#25.95.245':443
  • '20#.#9.212.100':443
  • 'we###er.co.ua':443
  • 'lo##.#ray.com.br':443
  • '91.##6.95.24':443
  • '20#.#6.41.87':443
  • '10#.#2.122.165':443
  • '64.##.197.143':443
  • 'ji##.go.jp':443
  • 'bi#####records.com.br':443
  • '69.##.149.166':443
  • 'ma##ntz.jp':443
  • '70.##.100.243':443
  • '69.##.128.35':443
  • '20#.#4.220.4':443
  • '21#.#65.4.71':443
  • '21#.#86.115.36':443
  • 'sc####e-forum.co.jp':443
TCP
Other
  • 'ma####key.com.ua':443
  • 'im###ca.com.br':443
  • '21#.#71.131.16':443
  • 'tr######islandcasino.com.ua':443
  • 'm-####.lib.meiji.ac.jp':443
  • 'ka###a.co.jp':443
  • 'ir.####shima-u.ac.jp':443
  • 'aa##d.jp':443
  • 'di####.ips.co.jp':443
  • 'im#####olheados.com.br':443
  • 'di###er.com.br':443
  • 'ss#.#ukro.ua':443
  • 'lo##.#ray.com.br':443
  • 'we###er.co.ua':443
  • 'ji##.go.jp':443
  • 'bi#####records.com.br':443
  • 'ma##ntz.jp':443
  • 'bu###r.org.ua':443
  • '19#.#82.192.2':443
  • 'ss#.##rm-mailer.jp':443
  • 'fo##.cao.go.jp':443
  • 'g1##.#ecure.ne.jp':443
  • 'ss#.#oressl.jp':443
  • 'sa#####garias.com.br':443
  • '21#.#9.163.41':443
  • 'it#####.smartseminar.jp':443
  • 'wo#.##rlin.org.ua':443
  • 'sc####e-forum.co.jp':443
UDP
  • DNS ASK g1##.#ecure.ne.jp
  • DNS ASK aa##d.jp
  • DNS ASK mi#####ibiotec.co.jp
  • DNS ASK ex#.#roadser
  • DNS ASK se###y.com.br
  • DNS ASK ep#a
  • DNS ASK ne###etter.go
  • DNS ASK is##.tup.km.ua
  • DNS ASK di####.ips.co.jp
  • DNS ASK ru###.org.ua
  • DNS ASK sh##.poziti
  • DNS ASK se##re.fox
  • DNS ASK ka###a.co.jp
  • DNS ASK m-####.lib.meiji.ac.jp
  • DNS ASK tr######islandcasino.com.ua
  • DNS ASK im###ca.com.br
  • DNS ASK ir#
  • DNS ASK wo#.##rlin.org.ua
  • DNS ASK ml#.co.jp
  • DNS ASK ir.####shima-u.ac.jp
  • DNS ASK im#####olheados.com.br
  • DNS ASK fo###.gryada.org.ua
  • DNS ASK ap###.#eedexpo.co.jp
  • DNS ASK fo##.cao.go.jp
  • DNS ASK ss#.##rm-mailer.jp
  • DNS ASK ma####key.com.ua
  • DNS ASK it#####.smartseminar.jp
  • DNS ASK sa#####garias.com.br
  • DNS ASK in#e
  • DNS ASK bu###r.org.ua
  • DNS ASK ma##ntz.jp
  • DNS ASK ss#.#oressl.jp
  • DNS ASK bi#####records.com.br
  • DNS ASK ji##.go.jp
  • DNS ASK lo##.#ray.com.br
  • DNS ASK we###er.co.ua
  • DNS ASK ri##ex.jp
  • DNS ASK ac#####s.comodo.od.ua
  • DNS ASK sp####.cartoons.org.ua
  • DNS ASK ss#.#ukro.ua
  • DNS ASK di###er.com.br
  • DNS ASK nr#.co.jp
  • DNS ASK st##e.co.ua
  • DNS ASK sc####e-forum.co.jp
Miscellaneous
Creates and executes the following
  • '%WINDIR%\syswow64\wuaucldt.exe'
  • '%HOMEPATH%\wuaucldt.exe'
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c del <Full path to file>
  • '%WINDIR%\syswow64\cmd.exe' /c del %WINDIR%\syswow64\wuaucldt.exe
  • '%WINDIR%\syswow64\svchost.exe'

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

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  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.

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