Analysis

  • max time kernel
    94s
  • max time network
    97s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/11/2024, 09:16

General

  • Target
    c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6.exe
  • Size 4.4MB
  • Sample241114-k8rmbsxaql
  • SHA256 c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Renames multiple (317) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6.exe
    "C:\Users\Admin\AppData\Local\Temp\c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6.exe"
    1⤵
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2116
    • C:\Windows\SysWOW64\sysx32.exe
      C:\Windows\system32\sysx32.exe /scan
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      PID:2464
    • C:\Users\Admin\AppData\Local\Temp\_c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6.exe
      C:\Users\Admin\AppData\Local\Temp\_c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6.exe
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:5020
      • C:\Program Files\Windows NT\Accessories\wordpad.exe
        "C:\Program Files\Windows NT\Accessories\wordpad.exe"
        3⤵
        • Suspicious use of SetWindowsHookEx
        PID:3484
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
    1⤵
      PID:548

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          RestartUndo.exe

          • Path C:\Program Files\RestartUndo.exe
          • Size 4.4MB
          • SHA256 f09c8420393b0d546e74671576e3c651dfa964dcdfd5007cea71dd4b5d0e7a1a
          • MD5 SHA1 SHA512 SSDEEP

          _c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6.exe

          • Path C:\Users\Admin\AppData\Local\Temp\_c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6.exe
          • Size 4.3MB
          • SHA256 0682801e8dfa2eca8e3996a345b59ac2cd3f577a77a4ee62f8b37ee3ba8231db
          • MD5 SHA1 SHA512 SSDEEP

          sysx32.exe

          • Path C:\Windows\SysWOW64\sysx32.exe
          • Size 4.4MB
          • SHA256 c9ff554ad2c26b8a734b8c85fe083ebe55ceabca3d6bfd7e6f3ee8f32cc00ec6
          • MD5 SHA1 SHA512 SSDEEP

          memory/2116-0-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2116-172-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2464-701-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2464-702-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2464-1501-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2464-2691-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2464-2692-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2464-2693-0x0000000000400000-0x0000000000411000-memory.dmp

          memory/2464-2694-0x0000000000400000-0x0000000000411000-memory.dmp