Overview

overview

10

Static

static

413bd0bab5...b7.exe

windows7_x64

10

413bd0bab5...b7.exe

windows10-2004_x64

8

Analysis

  • max time kernel
    168s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 08:04

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General

  • Target

    413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe

  • Size

    351KB

  • MD5

    efd0d3409e5e7ffe94f931ff6f09035e

  • SHA1

    c7830b5cadb9320bc8b9876d84acb4e13f90434a

  • SHA256

    413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7

  • SHA512

    a60fa47ed884327adf98c3ed3e67cf0149678f6c2cf74c3c6c627e579067ad4636afe122fd246fbf0613889af46a096d3656932a4bcad52a12803ff0950b9386

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: 1CN2iQbBikFK9jM34Nb3WLx5DCenQLnbXp Ryuk
Wallets

1CN2iQbBikFK9jM34Nb3WLx5DCenQLnbXp

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\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1376
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
      • Drops file in Program Files directory
      PID:1276
    • C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe
      "C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe"
      1⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1796
      • C:\users\Public\LCDyJ.exe
        "C:\users\Public\LCDyJ.exe" C:\Users\Admin\AppData\Local\Temp\413bd0bab52129e4bafc343c40b16f47771eb154ebb13d415211ac5067cef4b7.exe
        2⤵
        • Executes dropped EXE
        • Deletes itself
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:520
        • 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\LCDyJ.exe" /f
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:640
          • C:\Windows\system32\reg.exe
            REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\users\Public\LCDyJ.exe" /f
            4⤵
            • Adds Run key to start application
            PID:1472

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/520-57-0x000007FEFC321000-0x000007FEFC323000-memory.dmp

      Filesize

      8KB

      Download

    • memory/640-62-0x000000013F5B0000-0x000000013F93A000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1276-58-0x000000013F5B0000-0x000000013F93A000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1276-61-0x000000013F5B0000-0x000000013F93A000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1796-54-0x0000000076C61000-0x0000000076C63000-memory.dmp

      Filesize

      8KB

      Download