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Analysis

  • max time kernel
    125s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29/03/2021, 12:47

General

  • Target

    0898a80dc248a7931f8e2bf76a22a0a8d54b39a815e3fe810a2a190c50017892.exe

  • Size

    124KB

  • MD5

    b16db2ad22dfe39c289f9ebd9ef4c493

  • SHA1

    23ccb60927905eb9be2a9ee4230ebac0836b611c

  • SHA256

    0898a80dc248a7931f8e2bf76a22a0a8d54b39a815e3fe810a2a190c50017892

  • SHA512

    5a95bda6dd3761e1a7967562c8dd1b5bf68ce7ac5e7a0c345465c012f9baa7f668080f9998cb29d8e45ba43adb3fd104ef62380818d2eab5ecf2a1e19e5b95e1

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = 'CRAny5Nq'; $torlink = 'http://etnbhivw5fjqytbmvt2o6zle3avqn6rrugfc35kmcmedbbgqbxtknlqd.onion'; function info(){alert("INSTRUCTION:\r\n1. Download tor browser.\r\n2. Open link through tor browser: " + $torlink + "\r\n3. Fill the form, your password: "+ $password +"\r\nWe will contact you shortly.\r\nAlways send files for test decryption.");};
URLs

http://etnbhivw5fjqytbmvt2o6zle3avqn6rrugfc35kmcmedbbgqbxtknlqd.onion

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

  • Executes dropped EXE 3 IoCs
  • Modifies file permissions 1 TTPs 2 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0898a80dc248a7931f8e2bf76a22a0a8d54b39a815e3fe810a2a190c50017892.exe
    "C:\Users\Admin\AppData\Local\Temp\0898a80dc248a7931f8e2bf76a22a0a8d54b39a815e3fe810a2a190c50017892.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4720
    • C:\Users\Admin\AppData\Local\Temp\mMlPVnmXsrep.exe
      "C:\Users\Admin\AppData\Local\Temp\mMlPVnmXsrep.exe" 9 REP
      2⤵
      • Executes dropped EXE
      PID:3280
    • C:\Users\Admin\AppData\Local\Temp\mpsrUBEkClan.exe
      "C:\Users\Admin\AppData\Local\Temp\mpsrUBEkClan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:3884
    • C:\Users\Admin\AppData\Local\Temp\rcHQOsfatlan.exe
      "C:\Users\Admin\AppData\Local\Temp\rcHQOsfatlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:1852
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:816
    • C:\Windows\SysWOW64\icacls.exe
      icacls "D:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:3120
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4780
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop "audioendpointbuilder" /y
        3⤵
          PID:5396
      • C:\Windows\SysWOW64\net.exe
        "C:\Windows\System32\net.exe" stop "samss" /y
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4928
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "samss" /y
          3⤵
            PID:5420
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:3568
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 stop "audioendpointbuilder" /y
            3⤵
              PID:5400
          • C:\Windows\SysWOW64\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4924
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:5384

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • memory/4720-38-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-54-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-77-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-78-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-75-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-79-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-80-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-69-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-81-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-73-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-82-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-83-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-74-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-86-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-85-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-87-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-89-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-88-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-90-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-91-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-68-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-67-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-66-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-65-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-63-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-64-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-62-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-61-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-12-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-60-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-13-0x00000000035D0000-0x00000000035D1000-memory.dmp

            Filesize

            4KB

          • memory/4720-58-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-59-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-14-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-57-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-15-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-16-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-17-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-18-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-56-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-76-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-55-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-52-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-53-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-51-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-50-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-49-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-45-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-48-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-46-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-44-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-37-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-43-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-42-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-41-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-40-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-39-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-33-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-35-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-32-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-31-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-30-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-28-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-29-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-27-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-26-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-25-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-24-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-23-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-22-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-21-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-20-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB

          • memory/4720-19-0x0000000002DD0000-0x0000000002DD1000-memory.dmp

            Filesize

            4KB