Analysis

  • max time kernel
    111s
  • max time network
    121s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-08-2024 15:56

General

  • Target

    fb87dd2eb0923a5d55af15672832e0c0N.dll

  • Size

    4.0MB

  • MD5

    fb87dd2eb0923a5d55af15672832e0c0

  • SHA1

    40e16fc80764604fdecdf6586907b6a7fa7982af

  • SHA256

    e9f5b8a40dfecccf1dade9264d687582f56aea19b2e8212779ee960325986330

  • SHA512

    d981867a14c42420e196f7422ebdb35affb5c8fa34cf1bad1bbd9a9a576956e4b7b99b77e280262f6a9f95ad95568cbce4b3eb2a096bcb10950619398cdaf5d2

  • SSDEEP

    49152:2L4EbUvI5jL53sdP+DaOVv8THIARyHqinLMTPfuQ1TAvO/HGzQkQSda/:2L4uqsLv/AkH7LMruQSyHlkQSk

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 1 IoCs
  • UPX packed file 3 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\fb87dd2eb0923a5d55af15672832e0c0N.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:548
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\fb87dd2eb0923a5d55af15672832e0c0N.dll,#1
      2⤵
      • Loads dropped DLL
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:4252
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4252 -s 720
        3⤵
        • Program crash
        PID:4556
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4252 -ip 4252
    1⤵
      PID:2892

    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/4252-4-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/4252-8-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/4252-6-0x0000000074750000-0x0000000074B6D000-memory.dmp

      Filesize

      4.1MB