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
    28-01-2025 15:29

General

  • Target

    2025-01-28_b21d7c63eabea7dac241fa813a69f366_destroyer_wannacry.exe

  • Size

    26KB

  • MD5

    b21d7c63eabea7dac241fa813a69f366

  • SHA1

    317eec1d89064a962f43ae5bd871bbf7294a042c

  • SHA256

    6837a61a80160c03f656789ae3fe7bdf66b9dd06511b24bf3d9abc5d1d1f6099

  • SHA512

    c56b1e225ac880e4e8290142e39c94974d05ba2295933d58e1eeffea45a283ee808338b7c5b53f370b71ea931c3d791987e0b84a358d8b115c3714e9622f2b23

  • SSDEEP

    384:CtWZPzzxAm1vA50rRxJYilMDwXd/clMOy5o915mb+82vE:H7zxAmMoVYTedFho9ma82M

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\2025-01-28_b21d7c63eabea7dac241fa813a69f366_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-28_b21d7c63eabea7dac241fa813a69f366_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2572
    • 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)
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1792
      • 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:2884
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2768
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2780
      • 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:1032
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:672
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2984
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2244
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2680
      • 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:1332
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2896
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2988
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1676
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1556

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        18B

        MD5

        f3b9becc19cabde43912370a1dcb35ed

        SHA1

        69fd5a88222aca9970b17eb8bc646704495c6dce

        SHA256

        e45bba3f4c70702ef273e8773afb41338b2976f1dbf85f513b93c3255f38c41c

        SHA512

        96e432259dbbbca5aacb82afa9f94f894ce8ef8c2638c814230bfe69ff72bc70a54ae9a67fe1b19834594123d94c41491e6de338c488fca68a89db4a2b1d1634

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

        Filesize

        26KB

        MD5

        b21d7c63eabea7dac241fa813a69f366

        SHA1

        317eec1d89064a962f43ae5bd871bbf7294a042c

        SHA256

        6837a61a80160c03f656789ae3fe7bdf66b9dd06511b24bf3d9abc5d1d1f6099

        SHA512

        c56b1e225ac880e4e8290142e39c94974d05ba2295933d58e1eeffea45a283ee808338b7c5b53f370b71ea931c3d791987e0b84a358d8b115c3714e9622f2b23

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1792-8-0x0000000000F10000-0x0000000000F1C000-memory.dmp

        Filesize

        48KB

      • memory/1792-9-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

        Filesize

        9.9MB

      • memory/1792-10-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

        Filesize

        9.9MB

      • memory/1792-1010-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

        Filesize

        9.9MB

      • memory/2572-0-0x000007FEF5DA3000-0x000007FEF5DA4000-memory.dmp

        Filesize

        4KB

      • memory/2572-1-0x0000000000360000-0x000000000036C000-memory.dmp

        Filesize

        48KB

      • memory/2572-3-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

        Filesize

        9.9MB

      • memory/2572-11-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

        Filesize

        9.9MB