Analysis

  • max time kernel
    122s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    28-10-2024 04:01

General

  • Target

    2024-10-28_8eb5649fc13f0c3851262784d8a23dc1_destroyer_wannacry.exe

  • Size

    27KB

  • MD5

    8eb5649fc13f0c3851262784d8a23dc1

  • SHA1

    25afa34b7ef3cf4d8a216df894ca19f873d2812e

  • SHA256

    4d1741ae2df66cf7b7e71dca62f338ad2a37b6df7682dc8f54c39c1f1ae0eb57

  • SHA512

    75673233f2b3be22622b1166fd6c618f983aea6e8034b9f7bac900994fe6efa065d6d669bbd7265577e19df3d51b011a20a11bf454f80b8bc76c8276be877abc

  • SSDEEP

    384:WtWZPzzxAm1va5Z7Diupt0tWfa2DWdzCkABl+Oy5o91Bq41382v+:77zxAmCBJv0f2DPkpho9Ci382W

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Chaos family
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • 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 2 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\2024-10-28_8eb5649fc13f0c3851262784d8a23dc1_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-10-28_8eb5649fc13f0c3851262784d8a23dc1_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1292
    • 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:1936
      • 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:2304
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2744
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2628
      • 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:1972
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:496
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1488
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:536
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:292
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:1284
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2864
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:880
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2584
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2944

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        376B

        MD5

        b529a7fbdea6aea3082307ba40a794f4

        SHA1

        a502f63b855205123ae0d408add94a7abca72730

        SHA256

        35bb15b739ec8edfbffbae9658328693762b271970adcd7a3f86fdb0387f8a6c

        SHA512

        477c4d49802c0d706dace4902a713c873f480ac08e0238cdee56875055447a17e4e98475cf18d6c3fe2bde091e6dce277fd9e8a35a8ad3401a9a15969addcc95

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

        Filesize

        27KB

        MD5

        8eb5649fc13f0c3851262784d8a23dc1

        SHA1

        25afa34b7ef3cf4d8a216df894ca19f873d2812e

        SHA256

        4d1741ae2df66cf7b7e71dca62f338ad2a37b6df7682dc8f54c39c1f1ae0eb57

        SHA512

        75673233f2b3be22622b1166fd6c618f983aea6e8034b9f7bac900994fe6efa065d6d669bbd7265577e19df3d51b011a20a11bf454f80b8bc76c8276be877abc

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1292-0-0x000007FEF5103000-0x000007FEF5104000-memory.dmp

        Filesize

        4KB

      • memory/1292-1-0x0000000001180000-0x000000000118E000-memory.dmp

        Filesize

        56KB

      • memory/1292-2-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

        Filesize

        9.9MB

      • memory/1292-9-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

        Filesize

        9.9MB

      • memory/1936-8-0x00000000009C0000-0x00000000009CE000-memory.dmp

        Filesize

        56KB

      • memory/1936-10-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

        Filesize

        9.9MB

      • memory/1936-11-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

        Filesize

        9.9MB

      • memory/1936-971-0x000007FEF5100000-0x000007FEF5AEC000-memory.dmp

        Filesize

        9.9MB