Overview

overview

10

Static

static

5cafcad96e...71.exe

windows7_x64

10

5cafcad96e...71.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    179s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 06:52

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General

  • Target

    5cafcad96e19beddbb93716bdcf3b79cc83919bf556c7698dc5be2d0ed68cf71.exe

  • Size

    150KB

  • MD5

    f763a2291bcb03be0e64bb3cd34b8424

  • SHA1

    ce182b871f86dd2a54143288c559e9baa3e16b5c

  • SHA256

    5cafcad96e19beddbb93716bdcf3b79cc83919bf556c7698dc5be2d0ed68cf71

  • SHA512

    77850884db6a62e04f7eb0857ce16eefbe94dddd1451a8ad53a9a4bd3333e29aa1cb65e61550ab5517038fde928803246b8185b853cf1f62c462c55eaf71f647

Score
10/10
ryukpersistenceransomware

Malware Config

Extracted

Path

C:\RyukReadMe.txt

Family

ryuk

Ransom Note
Your network has been penetrated. All files on each host in the network have been encrypted with a strong algorithm. Backups were either encrypted Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover. We exclusively have decryption software for your situation. More than a year ago, world experts recognized the impossibility of deciphering by any means except the original decoder. No decryption software is available in the public. Antiviruse companies, researchers, IT specialists, and no other persons cant help you encrypt the data. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT DELETE readme files. To confirm our honest intentions.Send 2 different random files and you will get it decrypted. It can be from different computers on your network to be sure that one key decrypts everything. 2 files we unlock for free To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 12N7W9ycLhuck9Q2wT8E6BaN6XzZ4DMLau Ryuk No system is safe
Wallets

12N7W9ycLhuck9Q2wT8E6BaN6XzZ4DMLau

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • 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.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
    • Drops file in Program Files directory
    PID:1128
  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1196
    • C:\Users\Admin\AppData\Local\Temp\5cafcad96e19beddbb93716bdcf3b79cc83919bf556c7698dc5be2d0ed68cf71.exe
      "C:\Users\Admin\AppData\Local\Temp\5cafcad96e19beddbb93716bdcf3b79cc83919bf556c7698dc5be2d0ed68cf71.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1040
      • 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\5cafcad96e19beddbb93716bdcf3b79cc83919bf556c7698dc5be2d0ed68cf71.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1920
        • 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\5cafcad96e19beddbb93716bdcf3b79cc83919bf556c7698dc5be2d0ed68cf71.exe" /f
          3⤵
          • Adds Run key to start application
          PID:544

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/1040-54-0x000007FEFB571000-0x000007FEFB573000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1128-55-0x000000013F7B0000-0x000000013FB39000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1128-56-0x000000013F7B0000-0x000000013FB39000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1196-58-0x000000013F7B0000-0x000000013FB39000-memory.dmp

      Filesize

      3.5MB

      Download