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Trojan.MulDrop21.1910

Added to the Dr.Web virus database: 2022-10-18

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...
Sets the following service settings
  • [<HKLM>\System\CurrentControlSet\Services\Dhcp] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\DPS] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\lmhosts] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\NlaSvc] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\nsi] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\Winmgmt] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\Wlansvc] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\BFE] 'Start' = '00000002'
  • [<HKLM>\System\CurrentControlSet\Services\Dnscache] 'Start' = '00000002'
Malicious functions
Terminates or attempts to terminate
the following system processes:
  • <SYSTEM32>\cmd.exe
Modifies file system
Creates the following files
  • %TEMP%\e1d6.tmp\e1d7.tmp\e1d8.bat
Deletes the following files
  • %TEMP%\e1d6.tmp\e1d7.tmp\e1d8.bat
Miscellaneous
Executes the following
  • '<SYSTEM32>\cmd.exe' /c "%TEMP%\E1D6.tmp\E1D7.tmp\E1D8.bat <Full path to file>"
  • '<SYSTEM32>\net.exe' start Wcmsvc
  • '<SYSTEM32>\net1.exe' start Wcmsvc
  • '<SYSTEM32>\net.exe' start RmSvc
  • '<SYSTEM32>\net1.exe' start RmSvc
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=0 call disable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=1 call disable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=2 call disable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=3 call disable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=4 call disable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=5 call disable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=0 call enable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=1 call enable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=2 call enable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=3 call enable
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=5 call enable
  • '<SYSTEM32>\ipconfig.exe' /release
  • '<SYSTEM32>\arp.exe' -d *
  • '<SYSTEM32>\route.exe' -f
  • '<SYSTEM32>\nbtstat.exe' -R
  • '<SYSTEM32>\nbtstat.exe' -RR
  • '<SYSTEM32>\netcfg.exe' -d
  • '<SYSTEM32>\netsh.exe' winsock reset
  • '<SYSTEM32>\netsh.exe' int 6to4 reset all
  • '<SYSTEM32>\netsh.exe' int httpstunnel reset all
  • '<SYSTEM32>\netsh.exe' int ip reset
  • '<SYSTEM32>\netsh.exe' int isatap reset all
  • '<SYSTEM32>\netsh.exe' int portproxy reset all
  • '<SYSTEM32>\netsh.exe' int tcp reset all
  • '<SYSTEM32>\netsh.exe' int teredo reset all
  • '<SYSTEM32>\netsh.exe' branchcache reset
  • '<SYSTEM32>\net1.exe' start Dhcp
  • '<SYSTEM32>\wbem\wmic.exe' path win32_networkadapter where index=4 call enable
  • '<SYSTEM32>\net.exe' start Dhcp
  • '<SYSTEM32>\sc.exe' config WlanSvc start= auto
  • '<SYSTEM32>\sc.exe' config LanmanWorkstation start= demand
  • '<SYSTEM32>\sc.exe' config WdiServiceHost start= demand
  • '<SYSTEM32>\sc.exe' config NcbService start= demand
  • '<SYSTEM32>\sc.exe' config ndu start= demand
  • '<SYSTEM32>\sc.exe' config Netman start= demand
  • '<SYSTEM32>\sc.exe' config netprofm start= demand
  • '<SYSTEM32>\sc.exe' config Dhcp start= auto
  • '<SYSTEM32>\sc.exe' config DPS start= auto
  • '<SYSTEM32>\sc.exe' config lmhosts start= auto
  • '<SYSTEM32>\sc.exe' config NlaSvc start= auto
  • '<SYSTEM32>\sc.exe' config nsi start= auto
  • '<SYSTEM32>\sc.exe' config RmSvc start= auto
  • '<SYSTEM32>\sc.exe' config Wcmsvc start= auto
  • '<SYSTEM32>\sc.exe' config Winmgmt start= auto
  • '<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\Printing\EduPrintProv" /Enable
  • '<SYSTEM32>\net.exe' start NlaSvc
  • '<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\Printing\PrinterCleanupTask" /Enable
  • '<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\WlanSvc\CDSSync" /Enable
  • '<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\WCM\WiFiTask" /Enable
  • '<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\NlaSvc\WiFiTask" /Enable
  • '<SYSTEM32>\schtasks.exe' /Change /TN "Microsoft\Windows\DUSM\dusmtask" /Enable
  • '<SYSTEM32>\reg.exe' add "HKLM\Software\Policies\Microsoft\Windows\NetworkConnectivityStatusIndicator" /v "NoActiveProbe" /t REG_DWORD /d "0" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\System\CurrentControlSet\Services\NlaSvc\Parameters\Internet" /v "EnableActiveProbing" /t REG_DWORD /d "1" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\System\CurrentControlSet\Services\BFE" /v "Start" /t REG_DWORD /d "2" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\System\CurrentControlSet\Services\Dnscache" /v "Start" /t REG_DWORD /d "2" /f
  • '<SYSTEM32>\reg.exe' add "HKLM\System\CurrentControlSet\Services\WinHttpAutoProxySvc" /v "Start" /t REG_DWORD /d "3" /f
  • '<SYSTEM32>\net.exe' start DPS
  • '<SYSTEM32>\net1.exe' start DPS
  • '<SYSTEM32>\net.exe' start nsi
  • '<SYSTEM32>\net1.exe' start nsi
  • '<SYSTEM32>\net1.exe' start NlaSvc
  • '<SYSTEM32>\ipconfig.exe' /renew

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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