Overview

overview

10

Static

static

b7e945a8da...a1.exe

windows7_x64

10

b7e945a8da...a1.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    171s
  • max time network
    42s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 02:51

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General

  • Target

    b7e945a8dafc91ebe8c8717ee3107498afc1ad5461599611d2fb07aaa7700aa1.exe

  • Size

    151KB

  • MD5

    2af0f010e71cb1ecddc52b13e4149ea2

  • SHA1

    6caead7f091d18baa393cdea1955d43fd7853850

  • SHA256

    b7e945a8dafc91ebe8c8717ee3107498afc1ad5461599611d2fb07aaa7700aa1

  • SHA512

    72856c70b931cbb1e0bf6c006cb959d7735cde779d40e56964e58578daf91ac0e0cbf8f3fb05efba3afe7400e3f2450acc98b711f1b29b2a9fb891ae86b13f66

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: 1ChnbV4Rt7nsb5acw5YfYyvBFDj1RXcVQu Ryuk No system is safe
Wallets

1ChnbV4Rt7nsb5acw5YfYyvBFDj1RXcVQu

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:1352
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1260
    • C:\Users\Admin\AppData\Local\Temp\b7e945a8dafc91ebe8c8717ee3107498afc1ad5461599611d2fb07aaa7700aa1.exe
      "C:\Users\Admin\AppData\Local\Temp\b7e945a8dafc91ebe8c8717ee3107498afc1ad5461599611d2fb07aaa7700aa1.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1860
      • 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\b7e945a8dafc91ebe8c8717ee3107498afc1ad5461599611d2fb07aaa7700aa1.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:304
        • 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\b7e945a8dafc91ebe8c8717ee3107498afc1ad5461599611d2fb07aaa7700aa1.exe" /f
          3⤵
          • Adds Run key to start application
          PID:788

    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/1260-55-0x000000013F790000-0x000000013FB19000-memory.dmp
      Filesize

      3.5MB

      Download
    • memory/1260-57-0x000000013F790000-0x000000013FB19000-memory.dmp
      Filesize

      3.5MB

      Download
    • memory/1860-54-0x000007FEFBE91000-0x000007FEFBE93000-memory.dmp
      Filesize

      8KB

      Download