Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    16-02-2025 03:34

General

  • Target

    cr4cked vixen.exe

  • Size

    27KB

  • MD5

    f3412def470db187f3a9b95ede250e73

  • SHA1

    65be90a1ad51bec8140cec84b49ea576f68696ee

  • SHA256

    8036cb4832edad45d44412716e288f9e354c30e88ea79958f66c1cd3c6e3cad4

  • SHA512

    640ae4dc939696cedeef764284fb1c86391c704d6ab65a6c48af1f4c0f63945ef38b41a3503d0075476aa1b4ba62bc71a73a4f91ece249a9b7432731997ce31f

  • SSDEEP

    384:4tWZPzzxAm1v85nIruz10CSGGCS6PNsnlyAOy5o91YVoL+82voP:N7zxAmAIruz10CGLkNiho9z682M

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 connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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\cr4cked vixen.exe
    "C:\Users\Admin\AppData\Local\Temp\cr4cked vixen.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2620
    • 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:2832
      • 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:2748
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2028
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1084
      • 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:2508
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2624
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1984
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1924
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2180
      • 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:2120
  • 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:2772
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2892
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:2588
      • C:\Windows\system32\mstsc.exe
        "C:\Windows\system32\mstsc.exe"
        1⤵
        • Enumerates connected drives
        PID:1016

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        510B

        MD5

        ca208aa04528e5b0d7fdb7691ae0851a

        SHA1

        b8599c39668429feefa6bf2b9fac4299219fb7d1

        SHA256

        cddf5d263ef9f30532f6a69dd5424dc6ae2082a7f2b3610d787b1590da55e328

        SHA512

        6b0e45ba3b9483830ce91a82b99564931bbab9439deddd4006c81d9d9d9dcefa8708c5b5b853858c628ef27f290a85334eb598802e1ac852cc2f489523b4001e

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

        Filesize

        27KB

        MD5

        f3412def470db187f3a9b95ede250e73

        SHA1

        65be90a1ad51bec8140cec84b49ea576f68696ee

        SHA256

        8036cb4832edad45d44412716e288f9e354c30e88ea79958f66c1cd3c6e3cad4

        SHA512

        640ae4dc939696cedeef764284fb1c86391c704d6ab65a6c48af1f4c0f63945ef38b41a3503d0075476aa1b4ba62bc71a73a4f91ece249a9b7432731997ce31f

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2620-0-0x000007FEF6473000-0x000007FEF6474000-memory.dmp

        Filesize

        4KB

      • memory/2620-1-0x0000000001160000-0x000000000116E000-memory.dmp

        Filesize

        56KB

      • memory/2620-3-0x000007FEF6470000-0x000007FEF6E5C000-memory.dmp

        Filesize

        9.9MB

      • memory/2620-11-0x000007FEF6470000-0x000007FEF6E5C000-memory.dmp

        Filesize

        9.9MB

      • memory/2832-8-0x00000000011E0000-0x00000000011EE000-memory.dmp

        Filesize

        56KB

      • memory/2832-9-0x000007FEF6470000-0x000007FEF6E5C000-memory.dmp

        Filesize

        9.9MB

      • memory/2832-10-0x000007FEF6470000-0x000007FEF6E5C000-memory.dmp

        Filesize

        9.9MB

      • memory/2832-1000-0x000007FEF6470000-0x000007FEF6E5C000-memory.dmp

        Filesize

        9.9MB