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Trojan.DownLoader13.13949

Added to the Dr.Web virus database: 2015-05-12

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Procedure Coordinator Visual' = '<SYSTEM32>\cnalghvfkc.exe'
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\HomeGroup User Config Function Manager] 'Start' = '00000002'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
  • Windows Security Center
Creates and executes the following:
  • '<SYSTEM32>\zayahzcfghj.exe' "<SYSTEM32>\cnalghvfkc.exe"
  • '%WINDIR%\Temp\lgnjlpdn2okzxigt.exe' -r 33032 tcp
  • '%TEMP%\lgnjlpdn2k0xxigtnxmsmgp.exe'
  • '<SYSTEM32>\cnalghvfkc.exe'
Modifies file system :
Creates the following files:
  • <SYSTEM32>\lxaxbakavmh\run
  • <SYSTEM32>\lxaxbakavmh\rng
  • %WINDIR%\Temp\lgnjlpdn2okzxigt.exe
  • <SYSTEM32>\lxaxbakavmh\cfg
  • <SYSTEM32>\zayahzcfghj.exe
  • %TEMP%\lgnjlpdn2k0xxigtnxmsmgp.exe
  • <SYSTEM32>\lxaxbakavmh\tst
  • <SYSTEM32>\cnalghvfkc.exe
  • <SYSTEM32>\lxaxbakavmh\etc
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\zayahzcfghj.exe
  • <SYSTEM32>\cnalghvfkc.exe
Deletes the following files:
  • %WINDIR%\Temp\lgnjlpdn2okzxigt.exe
  • <DRIVERS>\etc\hosts
Substitutes the HOSTS file.
Network activity:
Connects to:
  • 'dr###sugar.net':80
  • 'na###ass.net':80
  • 'na###ugar.net':80
  • 'na###tand.net':80
  • 'dr###stand.net':80
  • 'dr###pass.net':80
  • 'se###tand.net':80
  • 'we####daysugar.net':80
  • 'we####daystand.net':80
  • 'na###gain.net':80
  • 'dr###again.net':80
  • 'so###lack.net':80
  • 'lo###lack.net':80
  • 'wh###step.net':80
  • 'wh###plain.net':80
  • 'sa###tep.net':80
  • 'so###rown.net':80
  • 'so###tep.net':80
  • 'lo###tep.net':80
  • 'lo###lain.net':80
  • 'lo###rown.net':80
  • 'so###lain.net':80
  • 'se###ugar.net':80
  • 'hi###ance.net':80
  • 'wr###below.net':80
  • 'th###only.net':80
  • 'na###eep.com':80
  • 'eg###aker.com':80
  • 'gr###grain.net':80
  • 'fe###tate.net':80
  • 'ab###ead.net':80
  • 'lo###old.net':80
  • 'fr###yloss.net':80
  • 'na###here.net':80
  • 'se###gain.net':80
  • 'fo###stand.net':80
  • 'we####dayagain.net':80
  • 'we####daypass.net':80
  • 'se###ass.net':80
  • 'af###stand.net':80
  • 'af###pass.net':80
  • 'it###need.com':80
  • 'fo###pass.net':80
  • 'fo###sugar.net':80
  • 'af###sugar.net':80
TCP:
HTTP GET requests:
  • http://dr###sugar.net/index.php?me################################################
  • http://na###ass.net/index.php?me################################################
  • http://na###ugar.net/index.php?me################################################
  • http://na###tand.net/index.php?me################################################
  • http://dr###stand.net/index.php?me################################################
  • http://dr###pass.net/index.php?me################################################
  • http://se###tand.net/index.php?me################################################
  • http://we####daysugar.net/index.php?me################################################
  • http://we####daystand.net/index.php?me################################################
  • http://na###gain.net/index.php?me################################################
  • http://dr###again.net/index.php?me################################################
  • http://so###lack.net/index.php?me################################################
  • http://lo###lack.net/index.php?me################################################
  • http://wh###step.net/index.php?me################################################
  • http://wh###plain.net/index.php?me################################################
  • http://sa###tep.net/index.php?me################################################
  • http://so###rown.net/index.php?me################################################
  • http://so###tep.net/index.php?me################################################
  • http://lo###tep.net/index.php?me################################################
  • http://lo###lain.net/index.php?me################################################
  • http://lo###rown.net/index.php?me################################################
  • http://so###lain.net/index.php?me################################################
  • http://se###ugar.net/index.php?me################################################
  • http://hi###ance.net/index.php?me################################################
  • http://wr###below.net/index.php?me################################################
  • http://th###only.net/index.php?me################################################
  • http://na###eep.com/index.php?me################################################
  • http://eg###aker.com/index.php?me################################################
  • http://gr###grain.net/index.php?me################################################
  • http://fe###tate.net/index.php?me################################################
  • http://ab###ead.net/index.php?me################################################
  • http://lo###old.net/index.php?me################################################
  • http://fr###yloss.net/index.php?me################################################
  • http://na###here.net/index.php?me################################################
  • http://se###gain.net/index.php?me################################################
  • http://fo###stand.net/index.php?me################################################
  • http://we####dayagain.net/index.php?me################################################
  • http://we####daypass.net/index.php?me################################################
  • http://se###ass.net/index.php?me################################################
  • http://af###stand.net/index.php?me################################################
  • http://af###pass.net/index.php?me################################################
  • http://it###need.com/index.php?me################################################
  • http://fo###pass.net/index.php?me################################################
  • http://fo###sugar.net/index.php?me################################################
  • http://af###sugar.net/index.php?me################################################
UDP:
  • DNS ASK dr###sugar.net
  • DNS ASK na###ass.net
  • DNS ASK na###ugar.net
  • DNS ASK na###tand.net
  • DNS ASK dr###stand.net
  • DNS ASK dr###pass.net
  • DNS ASK se###tand.net
  • DNS ASK we####daysugar.net
  • DNS ASK we####daystand.net
  • DNS ASK na###gain.net
  • DNS ASK dr###again.net
  • DNS ASK lo###tep.net
  • DNS ASK wh###step.net
  • DNS ASK so###lack.net
  • DNS ASK sa###tep.net
  • DNS ASK sa###lain.net
  • DNS ASK wh###plain.net
  • DNS ASK lo###lack.net
  • DNS ASK lo###lain.net
  • DNS ASK so###tep.net
  • DNS ASK so###lain.net
  • DNS ASK so###rown.net
  • DNS ASK lo###rown.net
  • DNS ASK se###ugar.net
  • DNS ASK hi###ance.net
  • DNS ASK wr###below.net
  • DNS ASK th###only.net
  • DNS ASK na###eep.com
  • DNS ASK eg###aker.com
  • DNS ASK gr###grain.net
  • DNS ASK fe###tate.net
  • DNS ASK ab###ead.net
  • DNS ASK lo###old.net
  • DNS ASK fr###yloss.net
  • DNS ASK na###here.net
  • DNS ASK se###gain.net
  • DNS ASK fo###stand.net
  • DNS ASK we####dayagain.net
  • DNS ASK we####daypass.net
  • DNS ASK se###ass.net
  • DNS ASK af###stand.net
  • DNS ASK af###pass.net
  • DNS ASK it###need.com
  • DNS ASK fo###pass.net
  • DNS ASK fo###sugar.net
  • DNS ASK af###sugar.net
  • '23#.#55.255.250':1900

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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  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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