Analysis

  • max time kernel
    121s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    12-10-2024 09:42

General

  • Target

    2024-10-12_38aadaab1378aad3990f785d681fe358_wannacry.exe

  • Size

    1.1MB

  • MD5

    38aadaab1378aad3990f785d681fe358

  • SHA1

    55cf71b6799a04398903568c339728e53bddda7f

  • SHA256

    1636d268a7cf25d56a709c0ac48a420cd355fdb312d3fffb97a523ba3a33aea3

  • SHA512

    4764429ab490eee5153c3f11b75e678c472d2f6b43acb43308054994e6c539947782df1144e6ff3fdfc0317e08be15d8c138662e5ea2c671a77db3b7bb0a50fd

  • SSDEEP

    12288:kKjszLwuTaXEItdeNw2L8f4QOp8i2flUv1jVf80bYOTKAQT/Lo+43vGbdXMNlDc7:5f5efTYcP5gPa

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 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 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\2024-10-12_38aadaab1378aad3990f785d681fe358_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-10-12_38aadaab1378aad3990f785d681fe358_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2432
    • 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:480
      • 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:2640
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2688
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2596
      • 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:1104
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1720
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1948
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2764
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:324
      • 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:2316
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2828
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2276
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:492
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2632

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        1KB

        MD5

        bd69bec61f716a15d96e88499db4fd43

        SHA1

        9bcfadf43367971d899de6caa3ac7f93fac5ebba

        SHA256

        0d4fab7adf162ce579aed823e390da88a28770b5f9931ab6806af9a27fcd612a

        SHA512

        a06ef0f961125b01901e32c7b61ef25333d4fc4922c89ce2da7faf03c8d3cff31071a9de44a44c93e8152f0a9b71c267f53f59c4fef19f0e79b3ca6da34fc761

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

        Filesize

        1.1MB

        MD5

        38aadaab1378aad3990f785d681fe358

        SHA1

        55cf71b6799a04398903568c339728e53bddda7f

        SHA256

        1636d268a7cf25d56a709c0ac48a420cd355fdb312d3fffb97a523ba3a33aea3

        SHA512

        4764429ab490eee5153c3f11b75e678c472d2f6b43acb43308054994e6c539947782df1144e6ff3fdfc0317e08be15d8c138662e5ea2c671a77db3b7bb0a50fd

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/480-9-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/480-8-0x0000000000E20000-0x0000000000F34000-memory.dmp

        Filesize

        1.1MB

      • memory/480-11-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/480-1033-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2432-0-0x000007FEF53C3000-0x000007FEF53C4000-memory.dmp

        Filesize

        4KB

      • memory/2432-1-0x0000000000C40000-0x0000000000D54000-memory.dmp

        Filesize

        1.1MB

      • memory/2432-3-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

        Filesize

        9.9MB

      • memory/2432-10-0x000007FEF53C0000-0x000007FEF5DAC000-memory.dmp

        Filesize

        9.9MB