Overview

overview

10

Static

static

f11c927bbd...8b.exe

windows7_x64

10

f11c927bbd...8b.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    170s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 00:29

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General

  • Target

    f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe

  • Size

    153KB

  • MD5

    a1dbf564e44044009b39571153566cbe

  • SHA1

    cb432252dc9a9d5c9822fcaf331bce97bcc15b17

  • SHA256

    f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b

  • SHA512

    7887c895b269fdd14ecdd86514d65deb2653a81be2aeea3a01ee2efc48c09c021c56a5d9d899d7a0949804623f4c7ec61b479964da6223ca32d3a9cd03991140

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: 15LsUgfnuGc1PsHJPcfLQJEnHm2FnGAgYC Ryuk No system is safe
Wallets

15LsUgfnuGc1PsHJPcfLQJEnHm2FnGAgYC

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:1324
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1228
    • C:\Users\Admin\AppData\Local\Temp\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe
      "C:\Users\Admin\AppData\Local\Temp\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1684
      • 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\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1120
        • 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\f11c927bbdf1b8c4a2d84d68f25c9acd71fd7406acdc1ee99135904faad54d8b.exe" /f
          3⤵
          • Adds Run key to start application
          PID:1208

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/1228-55-0x000000013F6F0000-0x000000013FA79000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1228-57-0x000000013F6F0000-0x000000013FA79000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1684-54-0x000007FEFC081000-0x000007FEFC083000-memory.dmp

      Filesize

      8KB

      Download