Overview

overview

10

Static

static

248fc2f3ee...66.exe

windows7_x64

10

248fc2f3ee...66.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    179s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 09:16

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General

  • Target

    248fc2f3ee9edf8264afe74c7b2f381a3a259fb790cfdbaec90bccf7119be266.exe

  • Size

    149KB

  • MD5

    3159804eeee22d4b70a4b2c3249f8bed

  • SHA1

    e7048b671e95d3927199d2529ee400ab39a1a804

  • SHA256

    248fc2f3ee9edf8264afe74c7b2f381a3a259fb790cfdbaec90bccf7119be266

  • SHA512

    ee0a6f9418bf786672fe4ac31b9480312c533c0e132cc61dcb8551e655ae0a768600f41098f0354794d5e6316159fe0d1ee6b140897211290632de511ab9ffdc

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: 1CbP3cgi1Bcjuz6g2Fwvk4tVhqohqAVpDQ Ryuk No system is safe
Wallets

1CbP3cgi1Bcjuz6g2Fwvk4tVhqohqAVpDQ

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\taskhost.exe
    "taskhost.exe"
    1⤵
    • Drops file in Program Files directory
    PID:1248
  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1356
    • C:\Users\Admin\AppData\Local\Temp\248fc2f3ee9edf8264afe74c7b2f381a3a259fb790cfdbaec90bccf7119be266.exe
      "C:\Users\Admin\AppData\Local\Temp\248fc2f3ee9edf8264afe74c7b2f381a3a259fb790cfdbaec90bccf7119be266.exe"
      1⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:268
      • 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\248fc2f3ee9edf8264afe74c7b2f381a3a259fb790cfdbaec90bccf7119be266.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:724
        • 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\248fc2f3ee9edf8264afe74c7b2f381a3a259fb790cfdbaec90bccf7119be266.exe" /f
          3⤵
          • Adds Run key to start application
          PID:904

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/268-54-0x000007FEFB7E1000-0x000007FEFB7E3000-memory.dmp

      Filesize

      8KB

      Download

    • memory/1248-55-0x000000013FEB0000-0x0000000140238000-memory.dmp

      Filesize

      3.5MB

      Download

    • memory/1248-56-0x000000013FEB0000-0x0000000140238000-memory.dmp

      Filesize

      3.5MB

      Download