Analysis

  • max time kernel
    445s
  • max time network
    1166s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10/11/2024, 21:09

General

  • Target

    Loader.exe

  • Size

    17.9MB

  • MD5

    bea22ae5c744cc6615f2f19382f5300f

  • SHA1

    26170df7ce128fcf4fc4abd7d254444183183a93

  • SHA256

    b58117445d7d23312d99f0664912fbd039c15d78b96d8f5453ee47f1c6983cc8

  • SHA512

    21254481e35802c99155b12067ffa429c76e12929028c194817f92d6181ba935973a3915bb8279bbece46c794fd3df9b0a6338c848f4a46a1c09d9697adff8fb

  • SSDEEP

    393216:kJR1IgHFmTxJNv1E/XTygiF6RAYuiq4a8Vq6Df5D2b:UzIYIx1CiF6iCa8Vm

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Creates new service(s) 2 TTPs
  • Drops file in Drivers directory 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops file in System32 directory 6 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 4 IoCs
  • Launches sc.exe 4 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 32 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Loader.exe
    "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Drops file in Drivers directory
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5004
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2092
      • C:\Windows\system32\sc.exe
        sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys
        3⤵
        • Launches sc.exe
        PID:4240
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C sc start windowsproc
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3912
      • C:\Windows\system32\sc.exe
        sc start windowsproc
        3⤵
        • Launches sc.exe
        PID:3672
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4216
      • C:\Windows\system32\sc.exe
        sc create windowsproc type=kernel binpath=C:\Windows\System32\drivers\winhb.sys
        3⤵
        • Launches sc.exe
        PID:4312
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C sc start windowsproc
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4920
      • C:\Windows\system32\sc.exe
        sc start windowsproc
        3⤵
        • Launches sc.exe
        PID:2624
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\Loader.exe" MD5 | find /i /v "md5" | find /i /v "certutil"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2312
      • C:\Windows\system32\certutil.exe
        certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\Loader.exe" MD5
        3⤵
          PID:1076
        • C:\Windows\system32\find.exe
          find /i /v "md5"
          3⤵
            PID:3028
          • C:\Windows\system32\find.exe
            find /i /v "certutil"
            3⤵
              PID:2604
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c cls
            2⤵
              PID:5048

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

                • memory/5004-0-0x0000000140000000-0x00000001428E2000-memory.dmp

                  Filesize

                  40.9MB

                • memory/5004-1-0x00007FFD1CDE7000-0x00007FFD1CDE9000-memory.dmp

                  Filesize

                  8KB

                • memory/5004-2-0x0000000140000000-0x00000001428E2000-memory.dmp

                  Filesize

                  40.9MB

                • memory/5004-3-0x0000000140000000-0x00000001428E2000-memory.dmp

                  Filesize

                  40.9MB

                • memory/5004-4-0x0000000140000000-0x00000001428E2000-memory.dmp

                  Filesize

                  40.9MB

                • memory/5004-5-0x0000000140000000-0x00000001428E2000-memory.dmp

                  Filesize

                  40.9MB

                • memory/5004-21-0x0000000140000000-0x00000001428E2000-memory.dmp

                  Filesize

                  40.9MB

                • memory/5004-20-0x0000000140000000-0x00000001428E2000-memory.dmp

                  Filesize

                  40.9MB