Overview

overview

10

Static

static

884efd1521...b5.exe

windows7_x64

10

884efd1521...b5.exe

windows10-2004_x64

1

Analysis

  • max time kernel
    158s
  • max time network
    142s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 04:57

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General

  • Target

    884efd1521e2fff9a05e7428239b3d9b92442ecef1248dd2bb295b253016dfb5.exe

  • Size

    124KB

  • MD5

    3925ae7df3328773be923f74d70555e3

  • SHA1

    948af4614e8ff150fbe0bc38f40806b457acaf3a

  • SHA256

    884efd1521e2fff9a05e7428239b3d9b92442ecef1248dd2bb295b253016dfb5

  • SHA512

    1eb06c442f6c63d7f5908a57ec57852678820349385e8e77aa0baaa584e6bb2dca59c0e2d4529734f9108e298d245e755202b70461cc1e6402ef37cc7d3d942d

Score
10/10
ryukransomware

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] You will receive btc address for payment in the reply letter Ryuk No system is safe

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Drops desktop.ini file(s) 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SendNotifyMessage 17 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1232
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:1272
      • C:\Users\Admin\AppData\Local\Temp\884efd1521e2fff9a05e7428239b3d9b92442ecef1248dd2bb295b253016dfb5.exe
        "C:\Users\Admin\AppData\Local\Temp\884efd1521e2fff9a05e7428239b3d9b92442ecef1248dd2bb295b253016dfb5.exe"
        2⤵
        • Drops desktop.ini file(s)
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1772
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops desktop.ini file(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:1124

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

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    Downloads

    • memory/1124-55-0x000000013FFE0000-0x0000000140361000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1124-57-0x000000013FFE0000-0x0000000140361000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1232-58-0x000000013FFE0000-0x0000000140361000-memory.dmp

      Filesize

      3.5MB

      Download