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Trojan.DownLoader23.7597

Added to the Dr.Web virus database: 2016-11-04

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'SunJavaUpdateSched.1' = '<Full path to file>'
Malicious functions:
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add portopening protocol = ALL port = 3309 name = SqlServers mode = ENABLE scope = ALL profile = ALL
  • '<SYSTEM32>\netsh.exe' firewall add portopening protocol = TCP port = 25 name = Smtp mode = ENABLE scope = ALL profile = ALL
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram program = <DRIVERS>\<File name>.exe name = \<File name>.exe mode = ENABLE scope = ALL profile = ALL
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram program = <DRIVERS>\Descompacx.exe name = \Descompacx.exe mode = ENABLE scope = ALL profile = ALL
Modifies file system:
Creates the following files:
  • <DRIVERS>\Milks
  • <DRIVERS>\BoxFile.bcc
Network activity:
Connects to:
  • 'localhost':3309
  • 'www.go###e.com.br':80
  • 'www.mo#######belo.liveupdate.com.br':80
TCP:
HTTP GET requests:
  • http://www.mo#######belo.liveupdate.com.br/caixinha.jpg
UDP:
  • DNS ASK www.go###e.com.br
  • DNS ASK www.mo#######belo.liveupdate.com.br
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: 'Internet Banking - Windows Internet Explorer'
  • ClassName: '' WindowName: 'https://www.santandernet.com.br - Internet Banking - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'https://netbanking2.banespa.com.br - Internet Banking - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'Banco Itaъ - Feito Para Vocк - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'Banco Ita? - Feito Para Voc? - Windows Internet Explorer'
  • ClassName: '' WindowName: 'Banco Itaъ - Feito Para Vocк - Windows Internet Explorer'
  • ClassName: '' WindowName: 'Banco Ita? - Feito Para Voc? - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'https://www.santandernet.com.br - Internet Banking - Mozilla Firefox'
  • ClassName: '' WindowName: 'Serasa Experian - Consulta Serasa, Cheque, CPF, CNPJ, Crйdito e Certificado Digital - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'Serasa Experian - Consulta Serasa, Cheque, CPF, CNPJ, Cr?dito e Certificado Digital - Windows Internet Explorer'
  • ClassName: '' WindowName: 'Serasa Experian - Consulta Serasa, Cheque, CPF, CNPJ, Crйdito e Certificado Digital - Windows Internet Explorer'
  • ClassName: '' WindowName: 'Serasa Experian - Consulta Serasa, Cheque, CPF, CNPJ, Cr?dito e Certificado Digital - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'https://netbanking2.banespa.com.br - Internet Banking - Mozilla Firefox'
  • ClassName: '' WindowName: 'Bradesco Net Empresa - Windows Internet Explorer'
  • ClassName: '' WindowName: 'https://bradesconetempresa.com.br - Bradesco Net Empresa - Microsoft Internet Explorer'
  • ClassName: '' WindowName: '30 Horas - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'https://wwwss.bradesco.com.br - Bradesco Internet Banking - Mozilla Firefox'
  • ClassName: '' WindowName: 'Banco Bradesco S/A - Windows Internet Explorer'
  • ClassName: '' WindowName: 'Bradesco S/A - Windows Internet Explorer'
  • ClassName: '' WindowName: 'https://wwwss.bradesco.com.br - Banco Bradesco S/A - Mozilla Firefox'
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: '' WindowName: '$$$|*u3\V=_0A--29kyASrtyM,Cd.;/?KA9|712|aj923|$$$'
  • ClassName: '' WindowName: 'https://wwwss.bradesco.com.br - Bradesco S/A - Mozilla Firefox'
  • ClassName: '' WindowName: 'Bradesco Internet Banking - Windows Internet Explorer'
  • ClassName: '' WindowName: 'Meu HSBC - HSBC Bank Brasil S.A. - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'Meu HSBC - HSBC Bank Brasil S.A. - Mozilla Firefox'
  • ClassName: '' WindowName: '30 Horas - Windows Internet Explorer'
  • ClassName: '' WindowName: 'Meu HSBC - HSBC Bank Brasil S.A. - Windows Internet Explorer'
  • ClassName: '' WindowName: 'https://wwwss.bradesco.com.br - Bradesco S/A - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'https://wwwss.bradesco.com.br - Banco Bradesco S/A - Microsoft Internet Explorer'
  • ClassName: '' WindowName: 'https://wwwss.bradesco.com.br - Bradesco Internet Banking - Microsoft Internet Explorer'

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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