Analysis

  • max time kernel
    96s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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 2 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
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Event Triggered Execution: Accessibility Features 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 49 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of WriteProcessMemory 20 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⤵
    • Checks computer location settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3520
    • C:\Users\Admin\AppData\Roaming\osk.exe
      "C:\Users\Admin\AppData\Roaming\osk.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3692
      • 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:860
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2648
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3644
      • 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:2072
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2852
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2340
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1472
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2300
      • 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:1032
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2200
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:760
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2796
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:4092

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\Adobe\Setup\{AC76BA86-7AD7-1033-7B44-AC0F074E4100}\read_it.txt

      Filesize

      37B

      MD5

      f85b30a0142701aa424d4f6656a88825

      SHA1

      0598560e898703448191aaa3a509a060b49fb436

      SHA256

      8a5eb176f9e635e3013fe078eba09320965b07010311fd4f53ffbff674d94721

      SHA512

      237422dac3511d9f0f073e7cf908f296f54e46225cb851fc525840826635152b100fa26ef8ee3e526a9003532f352d540b3f661124ad1f65af639b60825fb7d0

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\2024-09-12_b2c21469ac9ee8a5998e6c7a1b7ccc2d_destroyer_wannacry.exe.log

      Filesize

      1KB

      MD5

      baf55b95da4a601229647f25dad12878

      SHA1

      abc16954ebfd213733c4493fc1910164d825cac8

      SHA256

      ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

      SHA512

      24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

    • 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\Accessibility\Magnify.lnk

      Filesize

      1B

      MD5

      d1457b72c3fb323a2671125aef3eab5d

      SHA1

      5bab61eb53176449e25c2c82f172b82cb13ffb9d

      SHA256

      8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

      SHA512

      ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

    • memory/3520-0-0x00007FFA47E23000-0x00007FFA47E25000-memory.dmp

      Filesize

      8KB

    • memory/3520-1-0x0000000000180000-0x000000000019C000-memory.dmp

      Filesize

      112KB

    • memory/3520-2-0x00007FFA47E20000-0x00007FFA488E1000-memory.dmp

      Filesize

      10.8MB

    • memory/3520-15-0x00007FFA47E20000-0x00007FFA488E1000-memory.dmp

      Filesize

      10.8MB

    • memory/3692-16-0x00007FFA47E20000-0x00007FFA488E1000-memory.dmp

      Filesize

      10.8MB

    • memory/3692-17-0x00007FFA47E20000-0x00007FFA488E1000-memory.dmp

      Filesize

      10.8MB

    • memory/3692-1061-0x00007FFA47E20000-0x00007FFA488E1000-memory.dmp

      Filesize

      10.8MB