Resubmissions

13-07-2024 09:54

240713-lxcvgawdmn 10

13-07-2024 09:52

240713-lv46yawdkj 10

13-07-2024 09:46

240713-lrz3tayajc 10

Analysis

  • max time kernel
    1368s
  • max time network
    1152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-07-2024 09:54

General

  • Target

    6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe

  • Size

    400KB

  • MD5

    47e14a46326791625b67704d4329bed6

  • SHA1

    01e0e607678a36d8e7e23d1fb11f8d7aa2c20581

  • SHA256

    6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8

  • SHA512

    e979fb4537a7fadbc6583a5cd537ce533111ea4a596bd8486b9fbf551ed7b390271a6218ccf71cd052d4270c1fe1957ec0aae4527c9613a0cdbc0e24641a19a2

  • SSDEEP

    6144:cMr9/U806q0jnjCyc1rIGruapfd7ggZqLuID/pFZwVZ3j:a806qwjCycpIGRpfd8cqCITpFZwD3

Malware Config

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 2 IoCs
  • 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.

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 34 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).

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 45 IoCs
  • Suspicious use of AdjustPrivilegeToken 50 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 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\6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe
    "C:\Users\Admin\AppData\Local\Temp\6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3544
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3696
      • 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:2000
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:3400
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2140
      • 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:1608
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:3060
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2808
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1248
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:452
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3676
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4888
  • C:\Windows\System32\vdsldr.exe
    C:\Windows\System32\vdsldr.exe -Embedding
    1⤵
      PID:3796
    • C:\Windows\System32\vds.exe
      C:\Windows\System32\vds.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:2744
    • C:\Windows\system32\OpenWith.exe
      C:\Windows\system32\OpenWith.exe -Embedding
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:4288

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      400KB

      MD5

      47e14a46326791625b67704d4329bed6

      SHA1

      01e0e607678a36d8e7e23d1fb11f8d7aa2c20581

      SHA256

      6312ac91761037de7a7afc7323671a004db71b31a69499178437bdf939fa9dd8

      SHA512

      e979fb4537a7fadbc6583a5cd537ce533111ea4a596bd8486b9fbf551ed7b390271a6218ccf71cd052d4270c1fe1957ec0aae4527c9613a0cdbc0e24641a19a2

    • C:\Users\Admin\Documents\for dencrypt

      Filesize

      462B

      MD5

      8649ec15ace934e93b7b02b651bb1ec1

      SHA1

      0e0d2b07183b05acc18b0ee66a58ff32dade331f

      SHA256

      13a31e4d4bb979d68c5f40177d3f5fe47644c36ff9f34055935d85363f2cdcba

      SHA512

      aa9fd932aaff39a2fe7216ee53dd2d474b13cfb133666d5c2dae1c1cbe63d8abadb697b771190d4cdd42bbb52c5dcbd279af43e0e232f0a59fbd4b5b01d3133f

    • memory/3544-1-0x00007FFD07553000-0x00007FFD07555000-memory.dmp

      Filesize

      8KB

    • memory/3544-0-0x0000000000270000-0x00000000002DA000-memory.dmp

      Filesize

      424KB

    • memory/3696-14-0x00007FFD07550000-0x00007FFD08011000-memory.dmp

      Filesize

      10.8MB

    • memory/3696-457-0x00007FFD07550000-0x00007FFD08011000-memory.dmp

      Filesize

      10.8MB