Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    12-09-2024 06:53

General

  • Target

    2024-09-12_b2c21469ac9ee8a5998e6c7a1b7ccc2d_destroyer_wannacry.exe

  • Size

    83KB

  • MD5

    b2c21469ac9ee8a5998e6c7a1b7ccc2d

  • SHA1

    b088b4d45e8177dbf037898fcf560cdf55c7a794

  • SHA256

    269b64f6ebfbf1aa867b3b23770df1cd0abff63dd63be3a50ee0faa374ef9390

  • SHA512

    3af537a71f98a3d68591e94d7a65cdcf4f5d95b7ea68d5486bdc3714746e002e9dc8781154bad158c4c0cde48949cf50e1d5d1978ae31b29934aebbd294e669f

  • SSDEEP

    1536:gNojJM0Sq9UIV5wlzNZ+c8dTSgfAiqKegnDJpmEsxr8UnFoVVBBJMp:G0Sq9UeuRcc8MVkegDJptWAUnF8/g

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 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 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Accessibility Features 1 TTPs

    Windows contains accessibility features that may be used by adversaries to establish persistence and/or elevate privileges.

  • 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\2024-09-12_b2c21469ac9ee8a5998e6c7a1b7ccc2d_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-09-12_b2c21469ac9ee8a5998e6c7a1b7ccc2d_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2008
    • C:\Users\Admin\AppData\Roaming\osk.exe
      "C:\Users\Admin\AppData\Roaming\osk.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:2884
      • 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:2772
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2716
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3040
      • 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:2168
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1632
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1216
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1612
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1856
      • 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:1212
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2584
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2916
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:448
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:856

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        83KB

        MD5

        b2c21469ac9ee8a5998e6c7a1b7ccc2d

        SHA1

        b088b4d45e8177dbf037898fcf560cdf55c7a794

        SHA256

        269b64f6ebfbf1aa867b3b23770df1cd0abff63dd63be3a50ee0faa374ef9390

        SHA512

        3af537a71f98a3d68591e94d7a65cdcf4f5d95b7ea68d5486bdc3714746e002e9dc8781154bad158c4c0cde48949cf50e1d5d1978ae31b29934aebbd294e669f

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • C:\Users\Default\read_it.txt

        Filesize

        37B

        MD5

        f85b30a0142701aa424d4f6656a88825

        SHA1

        0598560e898703448191aaa3a509a060b49fb436

        SHA256

        8a5eb176f9e635e3013fe078eba09320965b07010311fd4f53ffbff674d94721

        SHA512

        237422dac3511d9f0f073e7cf908f296f54e46225cb851fc525840826635152b100fa26ef8ee3e526a9003532f352d540b3f661124ad1f65af639b60825fb7d0

      • memory/2008-0-0x000007FEF6BF3000-0x000007FEF6BF4000-memory.dmp

        Filesize

        4KB

      • memory/2008-1-0x00000000013D0000-0x00000000013EC000-memory.dmp

        Filesize

        112KB

      • memory/2008-2-0x000007FEF6BF0000-0x000007FEF75DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2008-8-0x000007FEF6BF0000-0x000007FEF75DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2884-9-0x0000000000E90000-0x0000000000EAC000-memory.dmp

        Filesize

        112KB

      • memory/2884-11-0x000007FEF6BF0000-0x000007FEF75DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2884-10-0x000007FEF6BF0000-0x000007FEF75DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2884-973-0x000007FEF6BF0000-0x000007FEF75DC000-memory.dmp

        Filesize

        9.9MB