Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    07-10-2024 00:01

General

  • Target

    2024-10-06_27155b7a69ea88dc9419bc41c888c71c_wannacry.exe

  • Size

    266KB

  • MD5

    27155b7a69ea88dc9419bc41c888c71c

  • SHA1

    8b9ac105e975c9c22b731703dc080427f8973bf9

  • SHA256

    3f37eba38f0d399f33a98df657f9632d489dd10ba9741e2ba9e0b2056ef90124

  • SHA512

    75d08dd318ddc8a59dd65e5fcfc4a2f8ec8bd42a08b23acdc566d8adf73101f905b9d0c4631fa863f9b9dec92b996b742e95e1f28700689391181fc618bfc940

  • SSDEEP

    3072:2c9/eQxG5h7KMjlen9O0uE8o15OJlDUZbUVnWB3P1tPBLazb5YHPYvijQts1vlKC:2c9WQA70fO/yXBttPtFIEh1lVK/

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 3 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.

  • Drops desktop.ini file(s) 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 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 7 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\2024-10-06_27155b7a69ea88dc9419bc41c888c71c_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-10-06_27155b7a69ea88dc9419bc41c888c71c_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2772
    • C:\Users\Admin\AppData\Roaming\Word2024t.exe
      "C:\Users\Admin\AppData\Roaming\Word2024t.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • 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:2844
      • 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:2752
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2616
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2184
      • 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:2068
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2676
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2596
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2960
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1032
      • 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:2360
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2688
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1932
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2704
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2516

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        459B

        MD5

        486fa8802a705b9d3924c9bc97a7809c

        SHA1

        ab9b7e3446580a01308f8479cb9b2af079e2ff89

        SHA256

        3ea88fe5bf3f08691979a1022783f63c4cbe73b7f83c6ebd908dc1e897f6aacf

        SHA512

        2031713a347822f9f30d1defaa45e4c96fbf4712793b41dcaa0e15607fd310e7d01b98e05a0d86dd9685b8a5b4a5ac054b27a8b0aadf17a1632690c63a310cf2

      • C:\Users\Admin\AppData\Roaming\ImportSave.ico

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • C:\Users\Admin\AppData\Roaming\Word2024t.exe

        Filesize

        266KB

        MD5

        27155b7a69ea88dc9419bc41c888c71c

        SHA1

        8b9ac105e975c9c22b731703dc080427f8973bf9

        SHA256

        3f37eba38f0d399f33a98df657f9632d489dd10ba9741e2ba9e0b2056ef90124

        SHA512

        75d08dd318ddc8a59dd65e5fcfc4a2f8ec8bd42a08b23acdc566d8adf73101f905b9d0c4631fa863f9b9dec92b996b742e95e1f28700689391181fc618bfc940

      • memory/2772-0-0x000007FEF59C3000-0x000007FEF59C4000-memory.dmp

        Filesize

        4KB

      • memory/2772-1-0x0000000000830000-0x0000000000878000-memory.dmp

        Filesize

        288KB

      • memory/2844-7-0x0000000000E30000-0x0000000000E78000-memory.dmp

        Filesize

        288KB

      • memory/2844-9-0x000007FEF59C0000-0x000007FEF63AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2844-77-0x000007FEF59C0000-0x000007FEF63AC000-memory.dmp

        Filesize

        9.9MB

      • memory/2844-873-0x000007FEF59C0000-0x000007FEF63AC000-memory.dmp

        Filesize

        9.9MB