Overview

overview

10

Static

static

3af6d8ae48...94.exe

windows7_x64

10

3af6d8ae48...94.exe

windows10-2004_x64

8

Analysis

  • max time kernel
    178s
  • max time network
    26s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 08:21

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General

  • Target

    3af6d8ae486dc533fdbb81ca77b33765b9652d173c490862b9b7ea9d42f46794.exe

  • Size

    385KB

  • MD5

    ab9efa39a5aecf383c095401c1b6c658

  • SHA1

    f72409d3048d4c62cc12ceee280750f44e7eb3fc

  • SHA256

    3af6d8ae486dc533fdbb81ca77b33765b9652d173c490862b9b7ea9d42f46794

  • SHA512

    f4ff7547104c9de4c018daa36e7d60612691c4e07573a2bfe7fdf7dbdad9380251dad76a44a97d4c1eb81c1cc4584ce8c41888c892cd4b947061b5fc90964bb2

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 or deleted or backup disks were formatted. 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 No decryption software is available in the public. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT RENAME OR MOVE the encrypted and readme files. DO NOT DELETE readme files. This may lead to the impossibility of recovery of the certain files. To get info (decrypt your files) contact us at [email protected] or [email protected] BTC wallet: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe
Wallets

14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk

Signatures

  • Ryuk

    Ransomware distributed via existing botnets, often Trickbot or Emotet.

    ransomwareryuk
  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • 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 13 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
    • Drops file in Program Files directory
    PID:1248
  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1356
    • C:\Users\Admin\AppData\Local\Temp\3af6d8ae486dc533fdbb81ca77b33765b9652d173c490862b9b7ea9d42f46794.exe
      "C:\Users\Admin\AppData\Local\Temp\3af6d8ae486dc533fdbb81ca77b33765b9652d173c490862b9b7ea9d42f46794.exe"
      1⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:524
      • C:\users\Public\PiSpf.exe
        "C:\users\Public\PiSpf.exe" C:\Users\Admin\AppData\Local\Temp\3af6d8ae486dc533fdbb81ca77b33765b9652d173c490862b9b7ea9d42f46794.exe
        2⤵
        • Executes dropped EXE
        • Deletes itself
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1152
        • 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\Public\PiSpf.exe" /f
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1676
          • C:\Windows\system32\reg.exe
            REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\PiSpf.exe" /f
            4⤵
            • Adds Run key to start application
            PID:1120

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/524-54-0x0000000074F01000-0x0000000074F03000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1152-57-0x000007FEFB7E1000-0x000007FEFB7E3000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1248-58-0x000000013FD40000-0x00000001400CE000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1248-62-0x000000013FD40000-0x00000001400CE000-memory.dmp

      Filesize

      3.6MB

      Download

    • memory/1676-61-0x000000013FD40000-0x00000001400CE000-memory.dmp

      Filesize

      3.6MB

      Download