Overview

overview

10

Static

static

Ryuk

windows7_x64

10

Analysis

  • max time kernel
    252s
  • max time network
    312s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    27-04-2021 14:41

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General

  • Target

    plant-mood.exe

  • Size

    154KB

  • MD5

    331e0f8acc9e862fc88c5d3c3a692451

  • SHA1

    1154b6d321781cae818ca565eff78725189b29e2

  • SHA256

    0d1a109933d886cceebfed38ae78acbd792dfba3e116ffb6e867f58fb4c592d0

  • SHA512

    c55cfe084291a2dab7fa5d3f6194983447e0601ffd27e2311346672f6f34f792fa63c9584f9fbb9be1b4c81ca76d8c827cc47297e6e3197deef34ab20f451e1a

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: 1E4fQqzCvS8wgqy5T7n1DW8JMNMaUbeFAS Ryuk No system is safe
Wallets

1E4fQqzCvS8wgqy5T7n1DW8JMNMaUbeFAS

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Drops file in Drivers directory 64 IoCs
  • Modifies extensions of user files 2 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops startup file 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1168
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Drivers directory
      • Modifies extensions of user files
      • Drops startup file
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      PID:1116
    • C:\Users\Admin\AppData\Local\Temp\plant-mood.exe
      "C:\Users\Admin\AppData\Local\Temp\plant-mood.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1028
      • 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\plant-mood.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1248
        • 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\plant-mood.exe" /f
          3⤵
          • Adds Run key to start application
          PID:1732
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1212 -s 2016
      1⤵
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:37708

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/1028-60-0x000007FEFC381000-0x000007FEFC383000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1116-62-0x000000013F360000-0x000000013F6EA000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1248-61-0x0000000000000000-mapping.dmp

      Download

    • memory/1732-63-0x0000000000000000-mapping.dmp

      Download

    • memory/37708-67-0x00000000001A0000-0x00000000001A1000-memory.dmp

      Filesize

      4KB

      Download