Analysis

  • max time kernel
    122s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    01-03-2024 08:29

General

  • Target

    2024-03-01_a241612b5e52ca2a33c72ac7d12ac07e_wannacry.exe

  • Size

    211KB

  • MD5

    a241612b5e52ca2a33c72ac7d12ac07e

  • SHA1

    88cb40acc46ff18b0dfc0e283748e117f8fcc494

  • SHA256

    4c8a411ba653c73d9cf47886f3319ccab05373aa8024553a565eca0776397683

  • SHA512

    d4db8e1d4988390338fe0ae396b9140d67fbfa0c1e1c196c8f74c30bb9de4ec0f0d490f550abec49ff27514495c385a5b4b45479c6b2d2cae48b1d0853305b88

  • SSDEEP

    3072:vjSdeLRfmTcGPp97M26+MZjQQbKGUE3T9Mg5hw0GlVdopt5:BdwcGh7+jUGULsWVq

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects command variations typically used by ransomware 3 IoCs
  • Detects executables containing many references to VEEAM. Observed in ransomware 3 IoCs
  • Detects executables packed with ConfuserEx Mod 3 IoCs
  • 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 2 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 5 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\2024-03-01_a241612b5e52ca2a33c72ac7d12ac07e_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-01_a241612b5e52ca2a33c72ac7d12ac07e_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2072
    • 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:2612
      • 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:2572
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2700
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1932
      • 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:2728
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2848
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2404
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3064
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2352
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\note.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:472
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2504
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1608
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2168
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1616

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        1KB

        MD5

        64f3f5d98bcfc1fc43977dc09fb76d96

        SHA1

        ab309c9ca5704c10e047a61cdcae1f2a992551ca

        SHA256

        ae61c48dcf49393c284fee53fc02d2eab496f927aa5fa452e334d1fbbac35b3a

        SHA512

        905400dbe023e0003f16e54679820b9740b4af2ee8b381f3c37cf6c64367f686a996cf5c12f37cc3c67661260790fa715b7472666c3507411718cc97f92feec4

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

        Filesize

        211KB

        MD5

        a241612b5e52ca2a33c72ac7d12ac07e

        SHA1

        88cb40acc46ff18b0dfc0e283748e117f8fcc494

        SHA256

        4c8a411ba653c73d9cf47886f3319ccab05373aa8024553a565eca0776397683

        SHA512

        d4db8e1d4988390338fe0ae396b9140d67fbfa0c1e1c196c8f74c30bb9de4ec0f0d490f550abec49ff27514495c385a5b4b45479c6b2d2cae48b1d0853305b88

      • C:\Users\Admin\Desktop\CheckpointClose.odt

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2072-9-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2072-2-0x000000001AFB0000-0x000000001B030000-memory.dmp

        Filesize

        512KB

      • memory/2072-1-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2072-0-0x0000000000160000-0x000000000019C000-memory.dmp

        Filesize

        240KB

      • memory/2612-10-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2612-8-0x00000000001F0000-0x000000000022C000-memory.dmp

        Filesize

        240KB

      • memory/2612-958-0x000007FEF58F0000-0x000007FEF62DC000-memory.dmp

        Filesize

        9.9MB