Overview

overview

10

Static

static

9e8f01b3fb...39.exe

windows7_x64

10

9e8f01b3fb...39.exe

windows10-2004_x64

7

Analysis

  • max time kernel
    167s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-02-2022 03:59

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General

  • Target

    9e8f01b3fb2513649da36630fd7d20a2b87d11d5ec2e1f151498fd879d0d6d39.exe

  • Size

    170KB

  • MD5

    26f3ee3f591b0d3a267d8b1ac6ffd59c

  • SHA1

    e4f263ef3beb7e77ade5225c9d1e7d24bab668d0

  • SHA256

    9e8f01b3fb2513649da36630fd7d20a2b87d11d5ec2e1f151498fd879d0d6d39

  • SHA512

    aaae22bf758fbf8fe707ad0ee6d9e30421924461be1470d1232d8c20b404310070175f2f59db84f0d31220e5198c2290012fe18c25a005d02bcb6bf3921b10cb

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 9 IoCs

Processes

  • C:\Windows\system32\taskhost.exe
    "taskhost.exe"
    1⤵
    • Drops file in Program Files directory
    PID:1260
  • C:\Windows\system32\Dwm.exe
    "C:\Windows\system32\Dwm.exe"
    1⤵
      PID:1352
    • C:\Users\Admin\AppData\Local\Temp\9e8f01b3fb2513649da36630fd7d20a2b87d11d5ec2e1f151498fd879d0d6d39.exe
      "C:\Users\Admin\AppData\Local\Temp\9e8f01b3fb2513649da36630fd7d20a2b87d11d5ec2e1f151498fd879d0d6d39.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\9e8f01b3fb2513649da36630fd7d20a2b87d11d5ec2e1f151498fd879d0d6d39.exe" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:524
        • 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\9e8f01b3fb2513649da36630fd7d20a2b87d11d5ec2e1f151498fd879d0d6d39.exe" /f
          3⤵
          • Adds Run key to start application
          PID:572

    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/524-59-0x000000013F610000-0x000000013F99E000-memory.dmp
      Filesize

      3.6MB

      Download
    • memory/1260-55-0x000000013F610000-0x000000013F99E000-memory.dmp
      Filesize

      3.6MB

      Download
    • memory/1260-57-0x000000013F610000-0x000000013F99E000-memory.dmp
      Filesize

      3.6MB

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

      8KB

      Download