Analysis

  • max time kernel
    16s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    22/04/2024, 12:14

General

  • Target
    loader.exe
  • Size 4.1MB
  • Sample240422-pesprabc6w
  • SHA256 60c57f14c2e0e0df0bda16646b21dddceaee0159dafbbb8daba310d4e1b5be6c
  • MD5 SHA1 SHA512 SSDEEP

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 9 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 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)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2292
    • 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:2676
      • C:\Windows\system32\certutil.exe
        certutil -hashfile "C:\Users\Admin\AppData\Local\Temp\loader.exe" MD5
        3⤵
          PID:2516
        • C:\Windows\system32\find.exe
          find /i /v "md5"
          3⤵
            PID:1196
          • C:\Windows\system32\find.exe
            find /i /v "certutil"
            3⤵
              PID:2704

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              memory/2292-0-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-1-0x0000000077440000-0x00000000775E9000-memory.dmp

              memory/2292-2-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-3-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-4-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-5-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-6-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-7-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-8-0x000000013FE90000-0x000000014092F000-memory.dmp

              memory/2292-17-0x000000013FE90000-0x000000014092F000-memory.dmp