Analysis

  • max time kernel
    91s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-12-2024 08:25

General

  • Target

    2024-12-27_cb61793758d86065dcb57d3d7a9f767d_bkransomware_floxif.exe

  • Size

    4.7MB

  • MD5

    cb61793758d86065dcb57d3d7a9f767d

  • SHA1

    d25ee7a9753cf0ef7cf790d7ac364c103e310253

  • SHA256

    98321cc61ba88967840591fe0919ab2d010ac7b3bfae84435659839d6e554f26

  • SHA512

    52b694c77bcf14449ef87733989412c7c396a44bfdb55a9d3e7fed2494d48f45dd740b96af4927172fbb2799a85d6d06b057e2aed5a453173a1a142ca8205a91

  • SSDEEP

    98304:kBe40bl9dRPenSX5geoCA0DHDB1dE46V3u/o:h3NenqA8L/o

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 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 behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-12-27_cb61793758d86065dcb57d3d7a9f767d_bkransomware_floxif.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-27_cb61793758d86065dcb57d3d7a9f767d_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:2440
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2440 -s 684
      2⤵
      • Program crash
      PID:2656
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2440 -ip 2440
    1⤵
      PID:5088

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      67KB

      MD5

      7574cf2c64f35161ab1292e2f532aabf

      SHA1

      14ba3fa927a06224dfe587014299e834def4644f

      SHA256

      de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

      SHA512

      4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

    • memory/2440-4-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/2440-14-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/2440-12-0x0000000000760000-0x0000000000C21000-memory.dmp

      Filesize

      4.8MB