Analysis

  • max time kernel
    26s
  • max time network
    29s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    11-06-2024 15:10

General

  • Target

    Themida64.exe

  • Size

    30.5MB

  • MD5

    e0f0db8d1fd2c9a277f8e968977fa684

  • SHA1

    ae23b1e880bfade564e44759d01b965fda1f15d3

  • SHA256

    0486a1c12b05214b01ecf642e4c9c0159a767e507a4472cf8fda68deefe02786

  • SHA512

    347cd8dd2c4c5e9e84d111a8ecec77372e409aaa85c21f2c26ccca013467fad524d34c4ed6bc82386b5fa7eafe83531c0c81d63490b64e972cf68ce0001a1d9c

  • SSDEEP

    786432:zXLec7gEqw1qmSgjfXF6GCPKJn1pSRmnT:zCcQs5SgDX8GCPA1sRET

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 3 IoCs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Modifies data under HKEY_USERS 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Themida64.exe
    "C:\Users\Admin\AppData\Local\Temp\Themida64.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    PID:4560
  • C:\Windows\system32\LogonUI.exe
    "LogonUI.exe" /flags:0x4 /state0:0xa3a0e055 /state1:0x41c64e6d
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:788

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/4560-0-0x0000000076D46000-0x0000000076D47000-memory.dmp

    Filesize

    4KB

  • memory/4560-1-0x0000000076D30000-0x0000000076E20000-memory.dmp

    Filesize

    960KB

  • memory/4560-2-0x0000000076D30000-0x0000000076E20000-memory.dmp

    Filesize

    960KB

  • memory/4560-3-0x0000000076D30000-0x0000000076E20000-memory.dmp

    Filesize

    960KB

  • memory/4560-4-0x0000000076D30000-0x0000000076E20000-memory.dmp

    Filesize

    960KB

  • memory/4560-6-0x0000000000400000-0x0000000004CA9000-memory.dmp

    Filesize

    72.7MB

  • memory/4560-7-0x0000000000400000-0x0000000004CA9000-memory.dmp

    Filesize

    72.7MB

  • memory/4560-8-0x0000000000400000-0x0000000004CA9000-memory.dmp

    Filesize

    72.7MB

  • memory/4560-9-0x0000000000400000-0x0000000004CA9000-memory.dmp

    Filesize

    72.7MB

  • memory/4560-10-0x0000000000400000-0x0000000004CA9000-memory.dmp

    Filesize

    72.7MB

  • memory/4560-13-0x0000000076D30000-0x0000000076E20000-memory.dmp

    Filesize

    960KB

  • memory/4560-12-0x0000000000400000-0x0000000004CA9000-memory.dmp

    Filesize

    72.7MB