Overview

overview

10

Static

static

1d7647c565...9b.exe

windows7_x64

10

1d7647c565...9b.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    169s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 09:36

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General

  • Target

    1d7647c565c6efb818aff1500104584d926c6fac3be19f56fd6106c17f5e2e9b.exe

  • Size

    170KB

  • MD5

    87f52df87c03ef416af719d3b2210497

  • SHA1

    0f8047b08834f8a229992af67f1f6eb232d65941

  • SHA256

    1d7647c565c6efb818aff1500104584d926c6fac3be19f56fd6106c17f5e2e9b

  • SHA512

    01675e5440d7c32b592eb92b233ba236eab1dd2e72bc19d3054d88c84539a5b80674d67c2c655b9f9a9731ec380ed8c65db5a66af1f449f5f7d3e4e5aa62aa5c

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 WayneEvenson@protonmail.com or WayneEvenson@tutanota.com BTC wallet: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe
Emails

WayneEvenson@protonmail.com

WayneEvenson@tutanota.com
Wallets

14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk

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 9 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1312
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1220
    • C:\Users\Admin\AppData\Local\Temp\1d7647c565c6efb818aff1500104584d926c6fac3be19f56fd6106c17f5e2e9b.exe
      "C:\Users\Admin\AppData\Local\Temp\1d7647c565c6efb818aff1500104584d926c6fac3be19f56fd6106c17f5e2e9b.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:524
      • 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\1d7647c565c6efb818aff1500104584d926c6fac3be19f56fd6106c17f5e2e9b.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1148
        • 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\1d7647c565c6efb818aff1500104584d926c6fac3be19f56fd6106c17f5e2e9b.exe" /f
          3⤵
          • Adds Run key to start application
          PID:1208

    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/524-55-0x000007FEFC0E1000-0x000007FEFC0E3000-memory.dmp
      Filesize

      8KB

      Download
    • memory/1220-56-0x000000013FCE0000-0x000000014006E000-memory.dmp
      Filesize

      3.6MB

      Download
    • memory/1220-58-0x000000013FCE0000-0x000000014006E000-memory.dmp
      Filesize

      3.6MB

      Download
    • memory/1312-59-0x000000013FCE0000-0x000000014006E000-memory.dmp
      Filesize

      3.6MB

      Download