Analysis

  • max time kernel
    88s
  • max time network
    89s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-08-2024 00:45

General

  • Target

    c3aa95970aa264cdd6f238987bc6e5b0N.dll

  • Size

    950KB

  • MD5

    c3aa95970aa264cdd6f238987bc6e5b0

  • SHA1

    320060e4abec862fa4ae4196100df6fd344b1009

  • SHA256

    72d834e83d86b30be875e5b3e952a8b718d2ffcc3ae45226045a07567dbc6442

  • SHA512

    d184f3d011e2cc5cb27697af7f4a96dfd211cfb419c0caa63620178aba721ed73ce5e60c743fb1d97cb2442e084ac9c40f6d5193523b9ec95b2958ce829de443

  • SSDEEP

    24576:uf2VfWlcKu6Gavkg3NydIbbbI4IBAUZLYUrEH7b:2uscKu6GaXUT4IBAUZLY3

Malware Config

Signatures

  • Floxif, Floodfix

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

  • Detects Floxif payload 1 IoCs
  • Event Triggered Execution: AppInit DLLs 1 TTPs

    Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Loads dropped DLL 4 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\c3aa95970aa264cdd6f238987bc6e5b0N.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4588
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\c3aa95970aa264cdd6f238987bc6e5b0N.dll,#1
      2⤵
      • Loads dropped DLL
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:3120
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3120 -s 700
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:3824
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3120 -ip 3120
    1⤵
    • Loads dropped DLL
    PID:4372

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/3120-3-0x0000000002850000-0x0000000002880000-memory.dmp

    Filesize

    192KB

  • memory/3120-7-0x0000000002850000-0x0000000002880000-memory.dmp

    Filesize

    192KB

  • memory/3120-13-0x0000000002850000-0x0000000002880000-memory.dmp

    Filesize

    192KB

  • memory/3120-11-0x0000000010000000-0x00000000100D9000-memory.dmp

    Filesize

    868KB