Analysis

  • max time kernel
    103s
  • max time network
    104s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-08-2024 17:45

General

  • Target

    a6400ecba8aeca23fc2f8b4c1a2a4990N.dll

  • Size

    395KB

  • MD5

    a6400ecba8aeca23fc2f8b4c1a2a4990

  • SHA1

    a0f646bafd81322847e46bad80138a277448c5fc

  • SHA256

    dddf0fd9aa48438205e2f414e14e5ae7bc6968418104724265ea317f52c0eeb5

  • SHA512

    c95e4bee78ae54499829be864d8effd8cb9a66398d34bd26c0cf5feb70f1fcbc1d4b399cd29c0cb3e8a87cd679febd23d349ac829b530342712a308353c3d5c8

  • SSDEEP

    6144:iu/M8/CrMemoS4iB7ncZzPnRGpk+WQvg1+i/X5NKP5NCs/lwaj2QUBV+UdvrEFpd:PJQAnc1x+Wj5NKPqs92QUBjvrEH75

Malware Config

Signatures

  • Floxif, Floodfix

    Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.

  • Detects Floxif payload 1 IoCs
  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Loads dropped DLL 2 IoCs
  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Program Files directory 1 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\a6400ecba8aeca23fc2f8b4c1a2a4990N.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3352
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\a6400ecba8aeca23fc2f8b4c1a2a4990N.dll,#1
      2⤵
      • Loads dropped DLL
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:3672
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3672 -s 744
        3⤵
        • Program crash
        PID:5016
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 3672 -ip 3672
    1⤵
      PID:3640

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Program Files\Common Files\System\symsrv.dll

      Filesize

      67KB

      MD5

      7574cf2c64f35161ab1292e2f532aabf

      SHA1

      14ba3fa927a06224dfe587014299e834def4644f

      SHA256

      de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

      SHA512

      4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

    • memory/3672-7-0x00000000021B0000-0x00000000021E0000-memory.dmp

      Filesize

      192KB

    • memory/3672-6-0x00000000021B0000-0x00000000021E0000-memory.dmp

      Filesize

      192KB

    • memory/3672-11-0x00000000021B0000-0x00000000021E0000-memory.dmp

      Filesize

      192KB

    • memory/3672-9-0x0000000010000000-0x000000001004E000-memory.dmp

      Filesize

      312KB