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Profil

Trojan.DownLoader4.40838

Added to the Dr.Web virus database: 2011-08-15

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Terminal Server\Install\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows System Devices Manager' = '%WINDIR%\csrss.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Windows System Devices Manager' = '%WINDIR%\csrss.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows System Devices Manager' = '%WINDIR%\csrss.exe'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '%WINDIR%\csrss.exe:*:Enabled:Windows System Devices Manager'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:Windows System Devices Manager'
Creates and executes the following:
  • %WINDIR%\csrss.exe 
Executes the following:
  • <SYSTEM32>\sc.exe config MsMpSvc start= disabled
  • <SYSTEM32>\sc.exe config wuauserv start= disabled
  • <SYSTEM32>\net1.exe stop MsMpSvc
  • <SYSTEM32>\net1.exe stop wuauserv
  • %WINDIR%\explorer.exe http://br#####sers.myspace.com/Browse/Browse.aspx
  • <SYSTEM32>\netsh.exe firewall add allowedprogram 1.exe 1 ENABLE
  • <SYSTEM32>\net.exe stop MsMpSvc
  • <SYSTEM32>\net.exe stop wuauserv
Searches for windows to
detect programs and games:
  • ClassName: 'MSNHiddenWindowClass' WindowName: ''
  • ClassName: '_Oscar_StatusNotify' WindowName: ''
Modifies file system :
Creates the following files:
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\Browse[1].aspx
  • %WINDIR%\csrss.exe
Sets the 'hidden' attribute to the following files:
  • %WINDIR%\csrss.exe
  • <Full path to virus>
Network activity:
Connects to:
  • 'br#####sers.myspace.com':80
  • '85.##0.147.53':2866
  • 'localhost':1039
  • '24#.#56.38.241':2866
TCP:
HTTP GET requests:
  • br#####sers.myspace.com/Browse/Browse.aspx
UDP:
  • DNS ASK sc####idyscrubs.com
  • DNS ASK ma#.##chivum.info
  • DNS ASK ol#.###temofadown.com
  • DNS ASK ma#.#time.com
  • DNS ASK mi####astpost.org
  • DNS ASK mc##.#vengine.com
  • DNS ASK un###fed.com
  • DNS ASK jo####ls.lww.com
  • DNS ASK de#####mccloskey.org
  • DNS ASK sc####service.com
  • DNS ASK ma#.###gosbakugan.net
  • DNS ASK ol#.###gjuyt2tugas.com
  • DNS ASK xx#.#agdcom.de
  • DNS ASK er####rlounge.de
  • DNS ASK ma#.#guia.cl
  • DNS ASK tr###dvisor.com
  • DNS ASK ma#.#osbank.com
  • DNS ASK al#####shistory.info
  • DNS ASK tr####ationale.org
  • DNS ASK jo######faccountancy.com
  • DNS ASK st###ntime.info
  • DNS ASK ma#.#730ip.com
  • DNS ASK ve###tek.com
  • DNS ASK al#.##kibili.com
  • DNS ASK as###.ic.ac.uk
  • DNS ASK br#####sers.myspace.com
  • DNS ASK fi###.jebac.net
  • DNS ASK fi###.#abuka1234.com
  • DNS ASK su#####uni-sw.eesp.ch
  • DNS ASK xx#.##opklatka.pl
  • DNS ASK sh###tyle.com
  • DNS ASK qu#.51.com
  • DNS ASK in####highered.com
  • DNS ASK www.sh###man.com
  • DNS ASK we#####trafficspy.com
  • DNS ASK at#.##coctelera.net
Miscellaneous:
Searches for the following windows:
  • ClassName: 'ComboBoxEx32' WindowName: ''
  • ClassName: 'ComboBox' WindowName: ''
  • ClassName: 'msctls_statusbar32' WindowName: ''
  • ClassName: 'ReBarWindow32' WindowName: ''
  • ClassName: 'Address Band Root' WindowName: ''
  • ClassName: 'TskMultiChatForm.UnicodeClass' WindowName: ''
  • ClassName: 'Message Session' WindowName: ''
  • ClassName: '__oxFrame.class__' WindowName: ''
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: 'HTMLSOURCEVIEW' WindowName: ''
  • ClassName: 'IEFrame' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''
  • ClassName: '' WindowName: ''
  • ClassName: 'Internet Explorer_Server' WindowName: ''
  • ClassName: 'WorkerW' WindowName: ''
  • ClassName: 'Shell DocObject View' WindowName: ''
  • ClassName: 'Frame Tab' WindowName: ''
  • ClassName: 'TabWindowClass' 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.
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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