Analysis

  • max time kernel
    93s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-12-2024 07:23

General

  • Target

    2024-12-19_2fe3ff96b43df493a82bb86939297b4f_bkransomware_floxif.exe

  • Size

    4.7MB

  • MD5

    2fe3ff96b43df493a82bb86939297b4f

  • SHA1

    92beadedd231605d70e3425f0b4705f9b0dcd192

  • SHA256

    d315134d1ade6fe163e93b072e7e9a87abbafa66f64fda6f16a1b62d9297417e

  • SHA512

    ddfe911e5633fb35aa8265974e01dd0d1f7ac6302b88fdbca01b703841a8b2c33f9e3ded741232519c01a72c39c9c3515bbb4470705abffcf76dbbe1f33f589f

  • SSDEEP

    98304:kBe40bl9dRPenSX5gSuCY0DHDB1dE46V3u/f:h3NenEY8L/f

Malware Config

Signatures

  • Floxif family
  • 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
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • UPX packed file 3 IoCs

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

  • Drops file in Program Files directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Program crash 2 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 behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-12-19_2fe3ff96b43df493a82bb86939297b4f_bkransomware_floxif.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-19_2fe3ff96b43df493a82bb86939297b4f_bkransomware_floxif.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1600
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1600 -s 1268
      2⤵
      • Program crash
      PID:1484
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1600 -s 1276
      2⤵
      • Program crash
      PID:1816
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1600 -ip 1600
    1⤵
      PID:3744
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1600 -ip 1600
      1⤵
        PID:1384

      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/1600-4-0x0000000010000000-0x0000000010030000-memory.dmp

        Filesize

        192KB

      • memory/1600-14-0x0000000010000000-0x0000000010030000-memory.dmp

        Filesize

        192KB

      • memory/1600-12-0x0000000000560000-0x0000000000A21000-memory.dmp

        Filesize

        4.8MB