Analysis

  • max time kernel
    17s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    26-12-2024 09:07

General

  • Target

    25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe

  • Size

    1.3MB

  • MD5

    a2ed0b9ac4d22a5fd805989e8fddaa08

  • SHA1

    d4ac9a85a5aa9e38dbed515b73d39ae10161c14e

  • SHA256

    25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465

  • SHA512

    0f9d8f3ba9a78b780f4902ce1c2ea0681bcfe27652a4d4cb48590a5396840450389941c2af97051f4f669b6787d4536612536feabacecfbb5ce01ef8a49217f8

  • SSDEEP

    12288:4/weO8te/Elj30M9XKGlZOPHsejzfqnN+ByLWJXonZP3g3nTfrWzNnT4yi0krJto:IkDcZrEqC6BGx8GLvOqYaky4

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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 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\25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe
    "C:\Users\Admin\AppData\Local\Temp\25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2440
    • 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:2016
      • 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:2112
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2292
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2176
      • 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:2980
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2536
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2756
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2480
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2512
      • 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:2000
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2200
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2216
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:2524
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1968

      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

        288B

        MD5

        9f5e51975e60624345f3436146084f9e

        SHA1

        f0b548d8e8568abba8fe4f9c32ed0fd0f0666d3c

        SHA256

        fff125aed1c85389bbd02f42acada11526cf4d87e51c899e6d8cf9f3dfa2bd13

        SHA512

        2325dd039cb255be05aa274186e1369401cfef3bfaa2ccfab39f9f95bffda5ab206fff2d538eafdea8ea49aba96ab82248c43083ed60b121b4b2765adcec22c6

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

        Filesize

        1.3MB

        MD5

        a2ed0b9ac4d22a5fd805989e8fddaa08

        SHA1

        d4ac9a85a5aa9e38dbed515b73d39ae10161c14e

        SHA256

        25bd57fe41090c497e345576494bfdde075a447d2869817bf33d5adcbad10465

        SHA512

        0f9d8f3ba9a78b780f4902ce1c2ea0681bcfe27652a4d4cb48590a5396840450389941c2af97051f4f669b6787d4536612536feabacecfbb5ce01ef8a49217f8

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

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

      • memory/2016-8-0x0000000000D00000-0x0000000000E48000-memory.dmp

        Filesize

        1.3MB

      • memory/2016-9-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2016-10-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2016-977-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2440-0-0x000007FEF5CF3000-0x000007FEF5CF4000-memory.dmp

        Filesize

        4KB

      • memory/2440-1-0x0000000000DC0000-0x0000000000F08000-memory.dmp

        Filesize

        1.3MB

      • memory/2440-3-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

        Filesize

        9.9MB

      • memory/2440-11-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

        Filesize

        9.9MB