Analysis

  • max time kernel
    261s
  • max time network
    266s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/04/2023, 08:49

General

  • Target

    version.dll

  • Size

    2.5MB

  • MD5

    f9b89da94ed247b257ae8bac48304611

  • SHA1

    1637a3228884cf84b8f173e4249f2dc86193329a

  • SHA256

    0f84cac377432974a2232b164bfc7451aa5c4445c878387725df97486531fbcd

  • SHA512

    1dd2efc11287a1e917e008a826baadb721c68d1a3b8a6e0106306ae6dd85f2adfb782d4eb20d4020160304117ebd115a0c1c4996d84565e232d727eef7212096

  • SSDEEP

    49152:+FIlhMg37EU2o+SxDOwmzJQNDPFsx/qssluv7eMSlwGkgaUcPqVn:+VEMXSxDOwmzJsPF3sBezlnkKcP4n

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 6 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\version.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1192
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\version.dll,#1
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      PID:4928
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4928 -s 628
        3⤵
        • Program crash
        PID:3920
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4928 -ip 4928
    1⤵
      PID:3880

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/4928-133-0x0000000075200000-0x0000000075870000-memory.dmp

      Filesize

      6.4MB

    • memory/4928-134-0x0000000075200000-0x0000000075870000-memory.dmp

      Filesize

      6.4MB

    • memory/4928-135-0x0000000075200000-0x0000000075870000-memory.dmp

      Filesize

      6.4MB

    • memory/4928-136-0x0000000075200000-0x0000000075870000-memory.dmp

      Filesize

      6.4MB

    • memory/4928-137-0x0000000075200000-0x0000000075870000-memory.dmp

      Filesize

      6.4MB

    • memory/4928-138-0x0000000075200000-0x0000000075870000-memory.dmp

      Filesize

      6.4MB