Overview

overview

10

Static

static

b11b2876e9...c5.exe

windows7_x64

10

b11b2876e9...c5.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    164s
  • max time network
    26s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 03:12

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General

  • Target

    b11b2876e9b920084435e7e58dc9f7e1ea2cc82f5eeaee3aa90b684c39ce49c5.exe

  • Size

    126KB

  • MD5

    a7d8623641334264d5121b591b9457d2

  • SHA1

    f8715898b74cc0bb19f085b7c8759462f3b7d3b3

  • SHA256

    b11b2876e9b920084435e7e58dc9f7e1ea2cc82f5eeaee3aa90b684c39ce49c5

  • SHA512

    025339f40f2249d11ca45d7dc4f04f7e698aa32f47c9af09f616bbd5c4d0fc3f9f05b0327cc5de14150762acab2afc3290b573bdb199e3c438e8e5d9a0a0dcf7

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: 1FRNVupsCyTjUvF36GxHZrvLaPtY6hgkTm Ryuk No system is safe
Wallets

1FRNVupsCyTjUvF36GxHZrvLaPtY6hgkTm

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 12 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
      PID:1124
    • C:\Windows\system32\Dwm.exe
      "C:\Windows\system32\Dwm.exe"
      1⤵
        PID:1224
      • C:\Users\Admin\AppData\Local\Temp\b11b2876e9b920084435e7e58dc9f7e1ea2cc82f5eeaee3aa90b684c39ce49c5.exe
        "C:\Users\Admin\AppData\Local\Temp\b11b2876e9b920084435e7e58dc9f7e1ea2cc82f5eeaee3aa90b684c39ce49c5.exe"
        1⤵
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1620
        • C:\Windows\SysWOW64\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\b11b2876e9b920084435e7e58dc9f7e1ea2cc82f5eeaee3aa90b684c39ce49c5.exe" /f /reg:64
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1848
          • C:\Windows\SysWOW64\reg.exe
            REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\b11b2876e9b920084435e7e58dc9f7e1ea2cc82f5eeaee3aa90b684c39ce49c5.exe" /f /reg:64
            3⤵
            • Adds Run key to start application
            PID:112
      • C:\Windows\system32\conhost.exe
        \??\C:\Windows\system32\conhost.exe "13837279841297257353416514198117790716521367680114147183372060293988-2049743375"
        1⤵
          PID:1704

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1124-56-0x0000000030000000-0x0000000030383000-memory.dmp

          Filesize

          3.5MB

          Download

        • memory/1620-55-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1848-59-0x0000000030000000-0x0000000030383000-memory.dmp

          Filesize

          3.5MB

          Download