Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2024 22:21

General

  • Target

    2024-11-29_b5ef1d520befe79633982eb483cafadc_destroyer_wannacry.exe

  • Size

    26KB

  • MD5

    b5ef1d520befe79633982eb483cafadc

  • SHA1

    8ac1e9c5109823a3d03ee65c6ed15cf6404293bd

  • SHA256

    549772b695239a9db163ad7ceda902721ea021fb0a804855cc64f8b8a1a4e7ff

  • SHA512

    ce719ffb4807695b0ebf6e09403a79c8cc7f3ad50b17195f9d6f41c157c79afb91f12c0afc7586c54f5dd17180d8f02bde2ec31b010f5e67eaf29ccb59c0569b

  • SSDEEP

    768:Y7zxAmmBUrIIYrEgDYwVrho925O9c82c:YN2U0/8wVrq92O9nt

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Chaos family
  • 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
  • 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\2024-11-29_b5ef1d520befe79633982eb483cafadc_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-11-29_b5ef1d520befe79633982eb483cafadc_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2176
    • C:\Users\Admin\AppData\Roaming\photoshop.exe
      "C:\Users\Admin\AppData\Roaming\photoshop.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1268
      • 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:320
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2760
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2788
      • 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:2792
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1928
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2664
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1160
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1872
      • 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:2028
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2864
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2432
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1288
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1936

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\ProgramData\Adobe\Updater6\read_it.txt

        Filesize

        99B

        MD5

        a34e8b5fea52beb91dfc151fb35d4118

        SHA1

        d83d2450fa25795e7dd9b4a74a94aa4f559d7ca8

        SHA256

        3afcfc4894491b146cc04a21471937958945e7c8a8cc31621adc8607dec92e97

        SHA512

        7e51e3b4d68a7851e30a02d06e8efcfca44612ea2d5e52efec29fe1474b681be5ea75b2aca9066aa0994e2b79064750f0cbf9a05d56387e3eeaab3cda75f9e05

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

        Filesize

        26KB

        MD5

        b5ef1d520befe79633982eb483cafadc

        SHA1

        8ac1e9c5109823a3d03ee65c6ed15cf6404293bd

        SHA256

        549772b695239a9db163ad7ceda902721ea021fb0a804855cc64f8b8a1a4e7ff

        SHA512

        ce719ffb4807695b0ebf6e09403a79c8cc7f3ad50b17195f9d6f41c157c79afb91f12c0afc7586c54f5dd17180d8f02bde2ec31b010f5e67eaf29ccb59c0569b

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1268-9-0x00000000010C0000-0x00000000010CC000-memory.dmp

        Filesize

        48KB

      • memory/1268-10-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

        Filesize

        9.9MB

      • memory/1268-11-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

        Filesize

        9.9MB

      • memory/1268-961-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

        Filesize

        9.9MB

      • memory/2176-0-0x000007FEF5B43000-0x000007FEF5B44000-memory.dmp

        Filesize

        4KB

      • memory/2176-1-0x0000000000830000-0x000000000083C000-memory.dmp

        Filesize

        48KB

      • memory/2176-2-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

        Filesize

        9.9MB

      • memory/2176-12-0x000007FEF5B40000-0x000007FEF652C000-memory.dmp

        Filesize

        9.9MB