Analysis

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

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    11-12-2024 03:24

General

  • Target

    2024-12-11_8a484d02addb483bf392508d9a1012f3_wannacry.exe

  • Size

    419KB

  • MD5

    8a484d02addb483bf392508d9a1012f3

  • SHA1

    a4e8fd94099815e720c38dba4d7fa9672aa78f46

  • SHA256

    5ac4b4eb4e96607e6410a580d96dd609ec206cf5d04da13a0cc1a39c27c23a72

  • SHA512

    296a3c543d00773f4b5270a55da1c87f077192534880f31b69b46769d125f10bc3dd958f1d40e1ee85e4251ae38318568d5ccf7bb52c7cbb69e1b11d46e1e2fe

  • SSDEEP

    6144:K0oq99kjeyjaxSGcSh5DF2MdgS4fUfOL0PE:3Vk7axSGcShdF2MOS4ZoP

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\2024-12-11_8a484d02addb483bf392508d9a1012f3_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-11_8a484d02addb483bf392508d9a1012f3_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2684
    • 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:2736
      • 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:2808
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2816
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1680
      • 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:828
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2992
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2156
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1904
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2856
      • 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:628
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1672
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2176
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2588
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2380

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        335B

        MD5

        8bcd05b71c7716aa11ae6c0834964cb9

        SHA1

        a0a1671dab22ce954e879ea94ca066df27c18c58

        SHA256

        a5ed8ea221ddb9224d508c774a7b60601af01038f3948dc66a37094836ea9c98

        SHA512

        e0433f077f3f4a43f4189e6ae0a602fd85793fb4b2f549ad933db6b3e8f9c707329e4bdbf271fdc9b226d8a67aeb47a3a1ddaf0d108d3abffeda74b333bed374

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

        Filesize

        419KB

        MD5

        8a484d02addb483bf392508d9a1012f3

        SHA1

        a4e8fd94099815e720c38dba4d7fa9672aa78f46

        SHA256

        5ac4b4eb4e96607e6410a580d96dd609ec206cf5d04da13a0cc1a39c27c23a72

        SHA512

        296a3c543d00773f4b5270a55da1c87f077192534880f31b69b46769d125f10bc3dd958f1d40e1ee85e4251ae38318568d5ccf7bb52c7cbb69e1b11d46e1e2fe

      • C:\Users\Admin\Desktop\EnterRedo.ini

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2684-9-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2684-3-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2684-1-0x0000000001200000-0x000000000126E000-memory.dmp

        Filesize

        440KB

      • memory/2684-0-0x000007FEF63C3000-0x000007FEF63C4000-memory.dmp

        Filesize

        4KB

      • memory/2736-11-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2736-10-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2736-8-0x0000000000BB0000-0x0000000000C1E000-memory.dmp

        Filesize

        440KB

      • memory/2736-962-0x000007FEF63C0000-0x000007FEF6DAC000-memory.dmp

        Filesize

        9.9MB