Overview

overview

10

Static

static

d27d318e35...6b.exe

windows7_x64

10

d27d318e35...6b.exe

windows10-2004_x64

8

Analysis

  • max time kernel
    107s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 01:38

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General

  • Target

    d27d318e35c5a625f2f29128dea3982dede23c96292056c6c2d18a73b82f946b.exe

  • Size

    203KB

  • MD5

    1204f4881b1b67007e74e3129ae74992

  • SHA1

    1a184b8e44c447140300946287300b8f382654ac

  • SHA256

    d27d318e35c5a625f2f29128dea3982dede23c96292056c6c2d18a73b82f946b

  • SHA512

    c87ef11347596e0969309568a92f138810eb13b46378ce5c2321597d2b006d65165d711ebb9a3372d3396c730ce7c552a0b54562e873ddba8513590316458e47

Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note
<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html�������������������������������������������������������������������������������������������������������������������������������������������������������

Extracted

Path

C:\Documents and Settings\RyukReadMe.html

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1316
  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1216
    • 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:\Windows\system32\taskhost.exe" /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1828
      • C:\Windows\system32\reg.exe
        REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Windows\system32\taskhost.exe" /f
        3⤵
        • Adds Run key to start application
        PID:604
    • C:\Windows\System32\net.exe
      "C:\Windows\System32\net.exe" stop "samss" /y
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1172
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 stop "samss" /y
        3⤵
          PID:1028
    • C:\Users\Admin\AppData\Local\Temp\d27d318e35c5a625f2f29128dea3982dede23c96292056c6c2d18a73b82f946b.exe
      "C:\Users\Admin\AppData\Local\Temp\d27d318e35c5a625f2f29128dea3982dede23c96292056c6c2d18a73b82f946b.exe"
      1⤵
      • Loads dropped DLL
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1548
      • C:\Users\Admin\AppData\Local\Temp\QVQFdBP.exe
        "C:\Users\Admin\AppData\Local\Temp\QVQFdBP.exe" 8 LAN
        2⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:520
        • C:\Windows\System32\net.exe
          "C:\Windows\System32\net.exe" stop "samss" /y
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1264
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 stop "samss" /y
            4⤵
              PID:1460
          • 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\QVQFdBP.exe" /f
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:4392
            • 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\QVQFdBP.exe" /f
              4⤵
              • Adds Run key to start application
              PID:4416
        • C:\Windows\System32\net.exe
          "C:\Windows\System32\net.exe" stop "audioendpointbuilder" /y
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:688
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 stop "audioendpointbuilder" /y
            3⤵
              PID:1568
          • C:\Windows\System32\net.exe
            "C:\Windows\System32\net.exe" stop "samss" /y
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1456
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 stop "samss" /y
              3⤵
                PID:836
            • 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\d27d318e35c5a625f2f29128dea3982dede23c96292056c6c2d18a73b82f946b.exe" /f
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:888
              • 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\d27d318e35c5a625f2f29128dea3982dede23c96292056c6c2d18a73b82f946b.exe" /f
                3⤵
                • Adds Run key to start application
                PID:1628
            • C:\Windows\System32\net.exe
              "C:\Windows\System32\net.exe" stop "samss" /y
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:1504
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 stop "samss" /y
                3⤵
                  PID:1748

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • memory/1216-61-0x000000013F170000-0x000000013F2E5000-memory.dmp

              Filesize

              1.5MB

              Download

            • memory/1216-59-0x000000013F170000-0x000000013F2E5000-memory.dmp

              Filesize

              1.5MB

              Download

            • memory/1548-55-0x000007FEFB801000-0x000007FEFB803000-memory.dmp

              Filesize

              8KB

              Download