Analysis

  • max time kernel
    16s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    15-12-2024 03:23

General

  • Target

    2024-12-15_603e48a98dad157d9f8661097ac9bd4e_wannacry.exe

  • Size

    362KB

  • MD5

    603e48a98dad157d9f8661097ac9bd4e

  • SHA1

    5680b89b1ff990bd32067bf2d84bb792d1614fa6

  • SHA256

    b6b9fa58bf57ceab4809ad2fc5983686567df05b92413aa8183a979b75f30016

  • SHA512

    43db5e997f260e66865195e08379dc9a6a83439cbff497f71f03255dde8ff2620b7852eeb592c1cb82d9a09934af9c0e802de879ae4476fe73a32ef324bb5354

  • SSDEEP

    6144:X4Zq9lVYxyj9aqEaEPs8PqAftRe2CT1R4qV3hAB52:X4gVYxuTEa8PqAfTPEqqV3yB52

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
  • 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 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\2024-12-15_603e48a98dad157d9f8661097ac9bd4e_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-15_603e48a98dad157d9f8661097ac9bd4e_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2216
    • C:\Users\Admin\AppData\Roaming\tools.exe
      "C:\Users\Admin\AppData\Roaming\tools.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:2672
      • 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:2908
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:1676
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1716
      • 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:2100
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2036
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2212
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2624
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2904
      • 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:2928
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2548
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1068
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2884
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2344

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        309B

        MD5

        cbac682dec9d9089cc260e3d70ec3c32

        SHA1

        6af5fa212bbf3151803a5760960da980159fa897

        SHA256

        45dac0116844b1f78a941d315ca62cfe4522bf769f7ebb21597c0c007261f17b

        SHA512

        daf5b712a25b4a77a4bf79a4813f5c0587c2ceee59cd91083713c72792b9ad9124840735d9bd1579102eef0b8b4d1e4a89c0f6850b801edf3e83e74cc5aaf806

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

        Filesize

        362KB

        MD5

        603e48a98dad157d9f8661097ac9bd4e

        SHA1

        5680b89b1ff990bd32067bf2d84bb792d1614fa6

        SHA256

        b6b9fa58bf57ceab4809ad2fc5983686567df05b92413aa8183a979b75f30016

        SHA512

        43db5e997f260e66865195e08379dc9a6a83439cbff497f71f03255dde8ff2620b7852eeb592c1cb82d9a09934af9c0e802de879ae4476fe73a32ef324bb5354

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2216-0-0x000007FEF4EB3000-0x000007FEF4EB4000-memory.dmp

        Filesize

        4KB

      • memory/2216-1-0x0000000000C00000-0x0000000000C60000-memory.dmp

        Filesize

        384KB

      • memory/2216-2-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

        Filesize

        9.9MB

      • memory/2216-7-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

        Filesize

        9.9MB

      • memory/2672-10-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

        Filesize

        9.9MB

      • memory/2672-9-0x00000000002A0000-0x0000000000300000-memory.dmp

        Filesize

        384KB

      • memory/2672-11-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

        Filesize

        9.9MB

      • memory/2672-1017-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmp

        Filesize

        9.9MB