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Analysis

  • max time kernel
    138s
  • max time network
    154s
  • platform
    windows11-21h2_x64
  • resource
    win11-20231215-en
  • resource tags

    arch:x64arch:x86image:win11-20231215-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24/12/2023, 23:33

General

  • Target

    celex.exe

  • Size

    4.0MB

  • MD5

    3d05f35dd57d171ef57a37fd9e8498fc

  • SHA1

    c18418fe05ab38c0005ecbc0ed6ba10caca174c8

  • SHA256

    070a26b9b519330da249104467525be63b1b23015d23c86b306d31465e79a024

  • SHA512

    65dbc4c75dffcce863c351206cf43312c58cd1273f226c404df4da69cecabb407bfb277f4d1bbbab5952c730407a3d79f2d926b2aa77a6df7abc318c55868737

  • SSDEEP

    98304:eEdeDPCpwDjPCTp9/ekFJkybBBHzmbLcwo8XGz:roPCSfaDmkFJk6BBypo8XGz

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Themida packer 12 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\celex.exe
    "C:\Users\Admin\AppData\Local\Temp\celex.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of WriteProcessMemory
    PID:1420
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\celex.exe" MD5 | find /i /v "md5" | find /i /v "certutil"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2952
      • C:\Windows\system32\certutil.exe
        certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\celex.exe" MD5
        3⤵
          PID:3760
        • C:\Windows\system32\find.exe
          find /i /v "certutil"
          3⤵
            PID:2884
          • C:\Windows\system32\find.exe
            find /i /v "md5"
            3⤵
              PID:4796

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/1420-0-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-1-0x00007FFA87060000-0x00007FFA87269000-memory.dmp

          Filesize

          2.0MB

        • memory/1420-2-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-3-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-4-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-5-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-6-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-8-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-7-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-15-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-17-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-18-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-19-0x00007FF665290000-0x00007FF665D20000-memory.dmp

          Filesize

          10.6MB

        • memory/1420-20-0x00007FFA87060000-0x00007FFA87269000-memory.dmp

          Filesize

          2.0MB