Analysis

  • max time kernel
    119s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-02-2025 14:58

General

  • Target

    Test.exe

  • Size

    816KB

  • MD5

    7d665d19c599e7dde4678186a93cd68c

  • SHA1

    ee40d4a8c9f93841af4a6ce9eded30ae00d6c28c

  • SHA256

    983223d3c64d68f560b7315bc8b32610c7606382e8778537bee3cfe70dff1f76

  • SHA512

    522072b91c03497a84d0df047ea2be56143e58878e7064ab3c82877499df1822c43701fb9233a8ae9b1a7fe7824d0171905d5f1fb676529439c792b1c9857b1a

  • SSDEEP

    12288:pn7H1QuMhey5GsQjlXfDVtemY79zhrGdb+qe2gUc2j+pey7lDrKhlHNtwGmI4mmh:VH1g2RNmjBaWmm

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 3 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.

  • 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 7 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\Test.exe
    "C:\Users\Admin\AppData\Local\Temp\Test.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2344
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • 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:2492
      • 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:2064
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2444
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2800
      • 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:2604
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2564
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2580
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2600
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:2960
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\README.txt
        3⤵
        • Opens file in notepad (likely ransom note)
        PID:2836
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2736
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1644
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:1688
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
        PID:1984

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        21B

        MD5

        f3cf2cbd8263794fdc35e749f030fe74

        SHA1

        92f408123657b7811c205c4c7d66e6efd3bc8143

        SHA256

        e2e17766f7dda95590b6b984f36d367fb077a2710009750354f7d6ac2ff0dfb1

        SHA512

        9a00ae7a7a89a60dd8c62db3b1cf20cf65518db6fe058cf1fc862463a4b8a616e2841a4c918822c00f0dc73d0b74cdab4ce318af6c4368aff66524aa10e18c23

      • C:\Users\Admin\AppData\Roaming\ConvertToEnable.docx

        Filesize

        1B

        MD5

        d1457b72c3fb323a2671125aef3eab5d

        SHA1

        5bab61eb53176449e25c2c82f172b82cb13ffb9d

        SHA256

        8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

        SHA512

        ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

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

        Filesize

        816KB

        MD5

        7d665d19c599e7dde4678186a93cd68c

        SHA1

        ee40d4a8c9f93841af4a6ce9eded30ae00d6c28c

        SHA256

        983223d3c64d68f560b7315bc8b32610c7606382e8778537bee3cfe70dff1f76

        SHA512

        522072b91c03497a84d0df047ea2be56143e58878e7064ab3c82877499df1822c43701fb9233a8ae9b1a7fe7824d0171905d5f1fb676529439c792b1c9857b1a

      • memory/2344-0-0x000007FEF5CD3000-0x000007FEF5CD4000-memory.dmp

        Filesize

        4KB

      • memory/2344-1-0x00000000000E0000-0x00000000001B2000-memory.dmp

        Filesize

        840KB

      • memory/2492-7-0x0000000001280000-0x0000000001352000-memory.dmp

        Filesize

        840KB

      • memory/2492-9-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

        Filesize

        9.9MB

      • memory/2492-93-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

        Filesize

        9.9MB

      • memory/2492-956-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

        Filesize

        9.9MB