Overview

overview

10

Static

static

d4422c4f4a...59.exe

windows7_x64

10

d4422c4f4a...59.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    167s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 01:32

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General

  • Target

    d4422c4f4a26aecad6e754dd172278305bacfa7d5ff285f6a74ed6c610307d59.exe

  • Size

    147KB

  • MD5

    ef372e7d0490bce48f6c11fe9f6c96c2

  • SHA1

    7ad646e6654e982d10c0bd6d9941476064800ebe

  • SHA256

    d4422c4f4a26aecad6e754dd172278305bacfa7d5ff285f6a74ed6c610307d59

  • SHA512

    a9b0b45ddd4089b73897592162c947f6e8e1dbce5ee5548294b3dde7f2b06aa23c8fb10be947282514fdacdc1eabdc252ef7c24c11f5b3d87212c35f49212f36

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: 1CbP3cgi1Bcjuz6g2Fwvk4tVhqohqAVpDQ Ryuk No system is safe
Wallets

1CbP3cgi1Bcjuz6g2Fwvk4tVhqohqAVpDQ

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\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1232
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1144
    • C:\Users\Admin\AppData\Local\Temp\d4422c4f4a26aecad6e754dd172278305bacfa7d5ff285f6a74ed6c610307d59.exe
      "C:\Users\Admin\AppData\Local\Temp\d4422c4f4a26aecad6e754dd172278305bacfa7d5ff285f6a74ed6c610307d59.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1940
      • 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\d4422c4f4a26aecad6e754dd172278305bacfa7d5ff285f6a74ed6c610307d59.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1224
        • 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\d4422c4f4a26aecad6e754dd172278305bacfa7d5ff285f6a74ed6c610307d59.exe" /f
          3⤵
          • Adds Run key to start application
          PID:520

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Privilege Escalation

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    System Information Discovery

    1
    T1082

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Replay Monitor

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    Downloads

    • memory/1144-56-0x000000013F380000-0x000000013F707000-memory.dmp
      Filesize

      3.5MB

      Download
    • memory/1144-58-0x000000013F380000-0x000000013F707000-memory.dmp
      Filesize

      3.5MB

      Download
    • memory/1940-55-0x000007FEFBF81000-0x000007FEFBF83000-memory.dmp
      Filesize

      8KB

      Download