Overview

overview

10

Static

static

b5149d96cf...2f.exe

windows7_x64

10

b5149d96cf...2f.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    172s
  • max time network
    32s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 03:00

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General

  • Target

    b5149d96cfbb0805e4ea55c8ca526eec6d44e953a48fb9027165156a51b9fb2f.exe

  • Size

    65KB

  • MD5

    3e2ffab5f65572b6c3c2d6b060f9b3b5

  • SHA1

    48a6f21c662003ddf0a2039ddce3d9f4a77737f0

  • SHA256

    b5149d96cfbb0805e4ea55c8ca526eec6d44e953a48fb9027165156a51b9fb2f

  • SHA512

    3a16f8611d0b30a9db8452ad493214c0d5fcfd69ac043940d88f39e4baa2ad889e047d3d061ff86f23e04b82b15b247cabb2c991d9e8edd04232acfede3051c5

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: 14hVKm7Ft2rxDBFTNkkRC3kGstMGp2A4hk Ryuk No system is safe
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 10 IoCs

Processes

  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1192
    • C:\Windows\system32\taskhost.exe
      "taskhost.exe"
      1⤵
        PID:1144
      • C:\Users\Admin\AppData\Local\Temp\b5149d96cfbb0805e4ea55c8ca526eec6d44e953a48fb9027165156a51b9fb2f.exe
        "C:\Users\Admin\AppData\Local\Temp\b5149d96cfbb0805e4ea55c8ca526eec6d44e953a48fb9027165156a51b9fb2f.exe"
        1⤵
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:316
        • 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\b5149d96cfbb0805e4ea55c8ca526eec6d44e953a48fb9027165156a51b9fb2f.exe" /f /reg:64
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:688
          • 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\b5149d96cfbb0805e4ea55c8ca526eec6d44e953a48fb9027165156a51b9fb2f.exe" /f /reg:64
            3⤵
            • Adds Run key to start application
            PID:1544

      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/316-54-0x0000000076451000-0x0000000076453000-memory.dmp
        Filesize

        8KB

        Download
      • memory/1144-55-0x0000000030000000-0x0000000030383000-memory.dmp
        Filesize

        3.5MB

        Download