Analysis

  • max time kernel
    118s
  • max time network
    118s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    16-09-2024 07:36

General

  • Target

    2024-09-16_77d67233128926082858536211d16c75_wannacry.exe

  • Size

    440KB

  • MD5

    77d67233128926082858536211d16c75

  • SHA1

    f64cfe2bda7787646ca037f9422f8c2663032d42

  • SHA256

    3469bb786be861e7d9afbfd51b1e6c31870d0b83272d085f59c25969bcaf1313

  • SHA512

    777720b9d726ab673a1ee6a0ef16320cf7ce1855e6ded788da6b0182f831ed9546164168d5da78b0962c01ed5df539c7ab6f966a150defdc60ba205b32fc6c16

  • SSDEEP

    6144:Tg8q9o9xLLZVDwYGrH7wVNJUWqIMJ4HnXckdymBh:Tg099LZVDwYGrbwPJtqINHnXPEmB

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
  • 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 2 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
  • Sets desktop wallpaper using registry 2 TTPs 1 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\2024-09-16_77d67233128926082858536211d16c75_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-09-16_77d67233128926082858536211d16c75_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2168
    • 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)
      • Sets desktop wallpaper using registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1944
      • 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:1720
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:604
        • 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:2512
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:684
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1936
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2440
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1528
      • 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:1368
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2748
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1736
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1344
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1812

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\read_it.txt

        Filesize

        453B

        MD5

        52ee3e2e2c5c7b94f1042083dfc0644f

        SHA1

        678812c4250409788ecc4d0c5fc3e5d3df687c89

        SHA256

        793516de44fd04cb186cb06b3c9bf8f441f7dd96488c71819c59138002287124

        SHA512

        3e453fcf963ba80209d2dbfb3f9d5ec33ef9f2f57d8e5c7e1ae89b58ae3a7246914b4324676e2f229c73271fa0ffda538f8df0559e100230d366652e86693bfd

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

        Filesize

        440KB

        MD5

        77d67233128926082858536211d16c75

        SHA1

        f64cfe2bda7787646ca037f9422f8c2663032d42

        SHA256

        3469bb786be861e7d9afbfd51b1e6c31870d0b83272d085f59c25969bcaf1313

        SHA512

        777720b9d726ab673a1ee6a0ef16320cf7ce1855e6ded788da6b0182f831ed9546164168d5da78b0962c01ed5df539c7ab6f966a150defdc60ba205b32fc6c16

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1944-10-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

        Filesize

        9.9MB

      • memory/1944-9-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

        Filesize

        9.9MB

      • memory/1944-8-0x0000000000A00000-0x0000000000A74000-memory.dmp

        Filesize

        464KB

      • memory/1944-1012-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2168-11-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2168-3-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

        Filesize

        9.9MB

      • memory/2168-1-0x0000000001100000-0x0000000001174000-memory.dmp

        Filesize

        464KB

      • memory/2168-0-0x000007FEF5903000-0x000007FEF5904000-memory.dmp

        Filesize

        4KB