Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    01-10-2024 05:43

General

  • Target

    2024-10-01_e6feeef3c64615286abe610bd69a04ff_chaos_destroyer_wannacry.exe

  • Size

    27KB

  • MD5

    e6feeef3c64615286abe610bd69a04ff

  • SHA1

    69cdb5743c21350eda3c4fce45d5c26ecace57c8

  • SHA256

    48ac83784322b01e7da5cf98a907f4197679dfbb571b8babfd67307ccdb978bf

  • SHA512

    0ea8446a77f41d075b6518823272da0e348240ab2eac3eac5204717b40d6b40c62a154337b15a2cee7b758916385239528b4c0f9fd9842dc822a493aa556c43e

  • SSDEEP

    384:+tWZPzzxAm1vZyby1m92WXbS/FjTqgUloOy5o91CJ8B82ve:j7zxAmisU2WXbSVJho9IJ4822

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Renames multiple (181) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Disables Task Manager via registry modification
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-10-01_e6feeef3c64615286abe610bd69a04ff_chaos_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-10-01_e6feeef3c64615286abe610bd69a04ff_chaos_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2112
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1916
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2796
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2860
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2872
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1984
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2644
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2228
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1452
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:884
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_me.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:2644
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2752
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:684
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:468
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2420

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\read_me.txt

        Filesize

        368B

        MD5

        262c78eca0c99c126b17fa0fba9b910e

        SHA1

        026b544a58f86d447f1b5e11010a294833cd419a

        SHA256

        a52f2c82b72094805912b9a07df1de5c60238eb35a3d225332759cd2983b0895

        SHA512

        55332123355dce7320202f298c0c4b533ab3eb822ac353a0a8b9a016b5154dfea783f8fb179427efeb40f5f4a03d9e922742761a2b5a2e9c39493d128f2f1575

      • C:\Users\Admin\AppData\Roaming\svchost.exe

        Filesize

        27KB

        MD5

        e6feeef3c64615286abe610bd69a04ff

        SHA1

        69cdb5743c21350eda3c4fce45d5c26ecace57c8

        SHA256

        48ac83784322b01e7da5cf98a907f4197679dfbb571b8babfd67307ccdb978bf

        SHA512

        0ea8446a77f41d075b6518823272da0e348240ab2eac3eac5204717b40d6b40c62a154337b15a2cee7b758916385239528b4c0f9fd9842dc822a493aa556c43e

      • C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Notepad.lnk

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1916-8-0x00000000001C0000-0x00000000001CE000-memory.dmp

        Filesize

        56KB

      • memory/1916-9-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

        Filesize

        9.9MB

      • memory/1916-10-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

        Filesize

        9.9MB

      • memory/1916-924-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2112-0-0x000007FEF5A03000-0x000007FEF5A04000-memory.dmp

        Filesize

        4KB

      • memory/2112-1-0x0000000000370000-0x000000000037E000-memory.dmp

        Filesize

        56KB

      • memory/2112-3-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2112-11-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

        Filesize

        9.9MB