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Trojan.MulDrop16.37419

Added to the Dr.Web virus database: 2021-04-01

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000001] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000002] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000003] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000004] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000005] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000006] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000007] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000008] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000009] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
  • [<HKLM>\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000010] 'PackedCatalogItem' = '{25,53,79,73,74,65,6d,52,6f,6f,74,25,5c,73,79,73,74,65,6d,33...
Creates the following services
  • 'tunnel' system32\DRIVERS\tunnel.sys
Modifies file system
Creates the following files
  • %TEMP%\2886.tmp\inopt.bat
  • <SYSTEM32>\logfiles\wmi\dhcpqec.etl
  • <SYSTEM32>\logfiles\wmi\dhcpv4trace.log
  • <SYSTEM32>\logfiles\wmi\dhcpv6trace.log
Miscellaneous
Executes the following
  • '<SYSTEM32>\cmd.exe' /c "%TEMP%\2886.tmp\INOPT.bat "<Full path to file>""
  • '<SYSTEM32>\netsh.exe' int ip set global neighborcachelimit=4096
  • '<SYSTEM32>\netsh.exe' int ip set global taskoffload=disabled
  • '<SYSTEM32>\netsh.exe' winsock reset
  • '<SYSTEM32>\netsh.exe' interface teredo set state disabled
  • '<SYSTEM32>\netsh.exe' int tcp set supplemental internet congestionprovider=ctcp
  • '<SYSTEM32>\netsh.exe' int ip set global multicastforwarding=disabled
  • '<SYSTEM32>\netsh.exe' int tcp set security mpp=disabled profiles=disabled
  • '<SYSTEM32>\netsh.exe' int ip set global icmpredirects=disabled
  • '<SYSTEM32>\netsh.exe' int tcp set security profiles=disabled
  • '<SYSTEM32>\netsh.exe' int tcp set security mpp=disabled
  • '<SYSTEM32>\netsh.exe' int tcp set global rsc=disabled
  • '<SYSTEM32>\netsh.exe' int tcp set global ecncapability=disabled
  • '<SYSTEM32>\netsh.exe' int tcp set global chimney=disabled
  • '<SYSTEM32>\netsh.exe' int tcp set heuristics disabled
  • '<SYSTEM32>\netsh.exe' int tcp set global timestamps=disabled
  • '<SYSTEM32>\netsh.exe' int isatap set state disable
  • '<SYSTEM32>\netsh.exe' interface 6to4 set state disabled
  • '<SYSTEM32>\netsh.exe' int tcp set global dca=enabled
  • '<SYSTEM32>\ping.exe' localhost -n 2
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "DefaultTTL" /t REG_DWORD /d "64" /f
  • '<SYSTEM32>\sc.exe' query BITS
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "SackOpts" /t REG_DWORD /d "0" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "MaxUserPort" /t REG_DWORD /d "65534" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "MaxConnectionsPerServer" /t REG_DWORD /d "0" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "TcpWindowSize" /t REG_DWORD /d "8760" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "GlobalMaxTcpWindowSize" /t REG_DWORD /d "8760" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "TcpTimedWaitDelay" /t REG_DWORD /d "32" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "TcpMaxDupAcks" /t REG_DWORD /d "2" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "Tcp1323Opts" /t REG_DWORD /d "0" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "EnablePMTUDiscovery" /t REG_DWORD /d "1" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters" /v "EnableICMPRedirect" /t REG_DWORD /d "1" /f
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' "ForEach($adapter In Get-NetAdapter){Disable-NetAdapterLso -Name $adapter.Name -ErrorAction SilentlyContinue}"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' "ForEach($adapter In Get-NetAdapter){Disable-NetAdapterPowerManagement -Name $adapter.Name -ErrorAction SilentlyContinue}"
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' Disable-NetAdapterLso -Name "*"
  • '<SYSTEM32>\wbem\wmic.exe' process where name="svchost.exe" call setpriority 256
  • '<SYSTEM32>\sc.exe' start BITS
  • '<SYSTEM32>\find.exe' "STOPPED"
  • '<SYSTEM32>\find.exe' /I "STATE"
  • '<SYSTEM32>\netsh.exe' int tcp set global autotuninglevel=normal
  • '<SYSTEM32>\netsh.exe' int tcp set global netdma=enabled
  • '<SYSTEM32>\netsh.exe' interface teredo set state disable
  • '<SYSTEM32>\netsh.exe' interface ipv6 6to4 set routing routing=enabled sitelocals=enabled
  • '<SYSTEM32>\netsh.exe' interface 6to4 set state state=enabled
  • '<SYSTEM32>\netsh.exe' interface 6to4 set routing routing=enabled sitelocals=enabled
  • '<SYSTEM32>\netsh.exe' interface 6to4 set mode online
  • '<SYSTEM32>\netsh.exe' http flush logbuffer
  • '<SYSTEM32>\netsh.exe' dnsclient set mode online
  • '<SYSTEM32>\netsh.exe' dhcpclient trace dump
  • '<SYSTEM32>\netsh.exe' dhcpclient trace enable
  • '<SYSTEM32>\netsh.exe' branchcache set service mode=DISTRIBUTED
  • '<SYSTEM32>\netsh.exe' branchcache set publicationcachesize DEFAULT
  • '<SYSTEM32>\netsh.exe' branchcache set publicationcache DEFAULT
  • '<SYSTEM32>\netsh.exe' branchcache set localcache DEFAULT
  • '<SYSTEM32>\netsh.exe' branchcache set key
  • '<SYSTEM32>\netsh.exe' branchcache set cachesize DEFAULT
  • '<SYSTEM32>\svchost.exe' -k PeerDist
  • '<SYSTEM32>\netsh.exe' branchcache flush
  • '<SYSTEM32>\ipconfig.exe' /flushdns
  • '<SYSTEM32>\ipconfig.exe' /renew
  • '<SYSTEM32>\netsh.exe' interface httpstunnel set mode online
  • '<SYSTEM32>\netsh.exe' interface ipv6 6to4 set state state=enabled
  • '<SYSTEM32>\netsh.exe' set mode online
  • '<SYSTEM32>\netsh.exe' interface ipv4 install
  • '<SYSTEM32>\netsh.exe' int tcp set global initialRto=2000
  • '<SYSTEM32>\netsh.exe' int tcp set global maxsynretransmissions=2
  • '<SYSTEM32>\netsh.exe' int tcp set global nonsackrttresiliency=disabled
  • '<SYSTEM32>\netsh.exe' interface tcp set security mpp=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set heuristics wsh=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set global timestamps=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set global ecncapability=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set global dca=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set global netdma=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set global congestionprovider=ctcp
  • '<SYSTEM32>\netsh.exe' interface tcp set global autotuning=normal
  • '<SYSTEM32>\netsh.exe' interface tcp set global autotuninglevel=normal
  • '<SYSTEM32>\netsh.exe' interface tcp set global chimney=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set global rss=enabled
  • '<SYSTEM32>\netsh.exe' interface tcp set mode online
  • '<SYSTEM32>\netsh.exe' interface set mode online
  • '<SYSTEM32>\netsh.exe' interface ipv4 set mode online
  • '<SYSTEM32>\netsh.exe' winsock set autotuning on
  • '<SYSTEM32>\reg.exe' add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile" /v "NetworkThrottlingIndex" /t REG_SZ /d "ffffffff" /f

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.
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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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