Analysis

  • max time kernel
    120s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    24-12-2024 22:12

General

  • Target

    Xeno_Exec.exe

  • Size

    5.4MB

  • MD5

    d8adc7b5885b14d5125bb9b10e0b32f2

  • SHA1

    0639fbeb424dfd244ed87a9950482fa22de1564e

  • SHA256

    145628cc523376793c93e65994ecc6c509bf107783892d2ca7a39766d150daec

  • SHA512

    2493a37fb69cef034428758c93c127da7faecea4ece03cf33fe462dd1cfba43375bdce2a23a09bed605cc4a7ac278a4a94b73e4947ca314e039398e085a5a7b6

  • SSDEEP

    49152:iuKIx29kk3sN2rEt/U964aKjSEvoYY+A2N:

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
  • 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\Xeno_Exec.exe
    "C:\Users\Admin\AppData\Local\Temp\Xeno_Exec.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1800
    • 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:1400
      • 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:2816
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2640
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2992
      • 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:636
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1380
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1304
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2760
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2604
      • 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:1864
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2888
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1712
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2596
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1928

      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

        29B

        MD5

        d287b8a4abf6e115c3f2e1b74c753745

        SHA1

        b327c995957d8396ab930a831be11b9d74313b4d

        SHA256

        abcd00e914df4ebae71ebbd4a5d624dd21989d587afa07def4b08e1c231bbb77

        SHA512

        b642755ec92ed60eb799f15de5d04a9301da31ed2aa35fb86e0a13ee1221c6eef0fd7b6b5c005ebd8706ba4a93fc59ec41b69d460d325b6efd228773df4a69a2

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

        Filesize

        5.4MB

        MD5

        d8adc7b5885b14d5125bb9b10e0b32f2

        SHA1

        0639fbeb424dfd244ed87a9950482fa22de1564e

        SHA256

        145628cc523376793c93e65994ecc6c509bf107783892d2ca7a39766d150daec

        SHA512

        2493a37fb69cef034428758c93c127da7faecea4ece03cf33fe462dd1cfba43375bdce2a23a09bed605cc4a7ac278a4a94b73e4947ca314e039398e085a5a7b6

      • C:\Users\Admin\Desktop\EditRemove.xlsx

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/1400-9-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

        Filesize

        9.9MB

      • memory/1400-8-0x00000000002E0000-0x000000000084E000-memory.dmp

        Filesize

        5.4MB

      • memory/1400-10-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

        Filesize

        9.9MB

      • memory/1400-1021-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

        Filesize

        9.9MB

      • memory/1800-0-0x000007FEF5873000-0x000007FEF5874000-memory.dmp

        Filesize

        4KB

      • memory/1800-1-0x00000000009B0000-0x0000000000F1E000-memory.dmp

        Filesize

        5.4MB

      • memory/1800-3-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

        Filesize

        9.9MB

      • memory/1800-1020-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

        Filesize

        9.9MB