Resubmissions

20-02-2025 09:24

250220-lc7t4s1pft 10

Analysis

  • max time kernel
    22s
  • max time network
    20s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    20-02-2025 09:24

General

  • Target

    2025-02-20_1dea80c3acd337a732a41b1ef0a655c9_destroyer_wannacry.exe

  • Size

    27KB

  • MD5

    1dea80c3acd337a732a41b1ef0a655c9

  • SHA1

    0c183db452f00bd5282de8c589b5ca39ff671dd6

  • SHA256

    a19228e0bf1b1aa215e84f0381b6f4ec16e4dc5831089600678a3d6c2eed0936

  • SHA512

    f42e8c34379afc24ac9dd3d87b6284571e60932d8dfe6b088cf30dd655416a894ad03e95c63b538d55fb20d082b9a3c0024cd4f8740665e13c8be7eef3070f62

  • SSDEEP

    384:OtWZPzzxAm1vmSZUoGnpjCG+N/y81lxOy5o91ns3J82v4:T7zxAmXZUoGwG+0Kho9VQ82A

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 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\2025-02-20_1dea80c3acd337a732a41b1ef0a655c9_destroyer_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-02-20_1dea80c3acd337a732a41b1ef0a655c9_destroyer_wannacry.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2736
    • 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:2388
      • 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:2920
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:424
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2552
      • 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:2968
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3036
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1612
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1744
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1232
      • 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:2404
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3064
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:336
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2252
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2120

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        384B

        MD5

        4527a1a6c828a73f063e103e63d697cd

        SHA1

        26c8f133fe0b6d033aac19a901e9198d0ff18352

        SHA256

        92eccda02248ea9ac84249ca833268534d135e99c4ad33f0e12c930a8c650b59

        SHA512

        7267a891748dc00453c2efa96d28ad4a3f860298cddc25ba8a765322db57cdf141b572a97d2e8bdb9442cae77e5259bebf5f8471210d54c645037a3d28722f4a

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

        Filesize

        27KB

        MD5

        1dea80c3acd337a732a41b1ef0a655c9

        SHA1

        0c183db452f00bd5282de8c589b5ca39ff671dd6

        SHA256

        a19228e0bf1b1aa215e84f0381b6f4ec16e4dc5831089600678a3d6c2eed0936

        SHA512

        f42e8c34379afc24ac9dd3d87b6284571e60932d8dfe6b088cf30dd655416a894ad03e95c63b538d55fb20d082b9a3c0024cd4f8740665e13c8be7eef3070f62

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2388-8-0x0000000000380000-0x000000000038E000-memory.dmp

        Filesize

        56KB

      • memory/2388-10-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2388-11-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2388-12-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2388-639-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2736-0-0x000007FEF5163000-0x000007FEF5164000-memory.dmp

        Filesize

        4KB

      • memory/2736-1-0x00000000000B0000-0x00000000000BE000-memory.dmp

        Filesize

        56KB

      • memory/2736-2-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

        Filesize

        9.9MB

      • memory/2736-9-0x000007FEF5160000-0x000007FEF5B4C000-memory.dmp

        Filesize

        9.9MB