Analysis

  • max time kernel
    120s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    18/03/2025, 21:28

General

  • Target

    FREEROBUX.exe

  • Size

    1.6MB

  • MD5

    4c0e5c4aa3eb66907cf32b7bd869dd8f

  • SHA1

    2f97ad58991c727a897f4613e00d6b24a3300a85

  • SHA256

    31aa2f05a7cd0b81002336c0f0b5397415b9ee70250862f91215e2bc4bb571d8

  • SHA512

    56ddad28ad605fe95b4b8f1ea00a130db1e07e082391ce2a1c8336d4ee6f177d1d9806b8a5e200ddc2bf7319f9ba44f194cb48f52f3e9f2c689e7d9b502eea51

  • SSDEEP

    24576:T1I8mdFc9nPV3EouDm6BkNEnzC5CW78UV:OFc3C37zCyG

Malware Config

Extracted

Path

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

Ransom Note
Don't worry, you can return all your files! All your files like documents, photos, databases and other important are encrypted What guarantees do we give to you? You can send 3 of your encrypted files and we decrypt it for free. You must follow these steps To decrypt your files : 1) Write on our e-mail :[email protected] ( In case of no answer in 24 hours check your spam folder or write us to this e-mail: [email protected]) 2) Obtain Bitcoin (You have to pay for decryption in Bitcoins. After payment we will send you the tool that will decrypt all your files.)

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
  • Sets desktop wallpaper using registry 2 TTPs 1 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\FREEROBUX.exe
    "C:\Users\Admin\AppData\Local\Temp\FREEROBUX.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2004
    • 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)
      • Sets desktop wallpaper using registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3040
      • 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:2924
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2964
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1828
      • 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:2244
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2856
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2524
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2504
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2232
      • 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:1668
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2936
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2056
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:884
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:3008

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        582B

        MD5

        ed5cc52876db869de48a4783069c2a5e

        SHA1

        a9d51ceaeff715ace430f9462ab2ee4e7f33e70e

        SHA256

        45726f2f29967ef016f8d556fb6468a577307d67388cc4530295a9ca10fdfa36

        SHA512

        1745aefb9b4db4cdd7c08ee3a7d133db08f35a336fd18b598211519b481ef25ac84a3e8a3da3db06caef9f531288d1cf0ca8d4b2560637945e7953e8b45421f5

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

        Filesize

        1.6MB

        MD5

        4c0e5c4aa3eb66907cf32b7bd869dd8f

        SHA1

        2f97ad58991c727a897f4613e00d6b24a3300a85

        SHA256

        31aa2f05a7cd0b81002336c0f0b5397415b9ee70250862f91215e2bc4bb571d8

        SHA512

        56ddad28ad605fe95b4b8f1ea00a130db1e07e082391ce2a1c8336d4ee6f177d1d9806b8a5e200ddc2bf7319f9ba44f194cb48f52f3e9f2c689e7d9b502eea51

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2004-0-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

        Filesize

        4KB

      • memory/2004-1-0x0000000000230000-0x00000000003CE000-memory.dmp

        Filesize

        1.6MB

      • memory/2004-2-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/2004-8-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/3040-10-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/3040-9-0x00000000010A0000-0x000000000123E000-memory.dmp

        Filesize

        1.6MB

      • memory/3040-11-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/3040-12-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB

      • memory/3040-187-0x000007FEF6400000-0x000007FEF6DEC000-memory.dmp

        Filesize

        9.9MB