Analysis

  • max time kernel
    7s
  • max time network
    8s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-04-2024 08:53

General

  • Target

    2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe

  • Size

    170KB

  • MD5

    b70b4f1a3b72fa2c76814d97b4dae493

  • SHA1

    6ea045b469eea3eabfed96263ff4bb97e1a6b2c3

  • SHA256

    dc8074b3b2a22876150975c7abf68296f232246cbbcae06d2bddc114d3a77905

  • SHA512

    f0906f7de8517cc0ff658ba4395d7085d16026043fa4d48482e18b16bdba4a958740e769bacbc89f4ec2aab2c7fc3e31ab0fe5002cb6ae8e7eac5e40baa751ff

  • SSDEEP

    3072:2HeriftL/WSo1vDb53j/8WGUzaqVh4LI8zQpn3:2+rA/WSo1rl3ALrlHQpn3

Score
9/10

Malware Config

Signatures

  • Detects command variations typically used by ransomware 2 IoCs
  • Detects executables containing many references to VEEAM. Observed in ransomware 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
      PID:2548
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc
      1⤵
        PID:2564
      • C:\Windows\system32\taskhostw.exe
        taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}
        1⤵
          PID:2660
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc
          1⤵
            PID:3664
          • C:\Windows\system32\DllHost.exe
            C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}
            1⤵
              PID:3856
            • C:\Users\Admin\AppData\Local\Temp\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe
              "C:\Users\Admin\AppData\Local\Temp\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe"
              1⤵
              • Checks computer location settings
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:4548
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe" /f
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1112
                • C:\Windows\system32\reg.exe
                  REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\2024-04-11_b70b4f1a3b72fa2c76814d97b4dae493_ryuk.exe" /f
                  3⤵
                  • Adds Run key to start application
                  PID:1740

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • memory/2548-0-0x00007FF772DC0000-0x00007FF77314E000-memory.dmp

              Filesize

              3.6MB

            • memory/2548-1-0x00007FF772DC0000-0x00007FF77314E000-memory.dmp

              Filesize

              3.6MB