Analysis

  • max time kernel
    93s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-12-2024 15:25

General

  • Target

    2024-12-18_3a7593fd271afe0d4f58f508032e9c94_bkransomware_floxif.exe

  • Size

    4.7MB

  • MD5

    3a7593fd271afe0d4f58f508032e9c94

  • SHA1

    2762e571762160e8b62df23a95ab5e47f6ad4890

  • SHA256

    8215eacef5e8772517ca0bf39cbabaf41a19a0db34f213cdd2ccd5c4ca5efefc

  • SHA512

    f775b7684977ab5c22412456081c3120270ef68eb64343b2c979f761825631191538b830df3220e83094056a9f9aae6b7c323b6c064dc9656f8e0b6d0ca10a69

  • SSDEEP

    98304:kBe40bl9dRPenSX5gSoCt0D5DB1dE46V3u/p:h3NenqtiL/p

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\2024-12-18_3a7593fd271afe0d4f58f508032e9c94_bkransomware_floxif.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-18_3a7593fd271afe0d4f58f508032e9c94_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:2504
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2504 -s 1272
      2⤵
      • Program crash
      PID:1684
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2504 -ip 2504
    1⤵
      PID:3064

    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/2504-4-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/2504-14-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/2504-12-0x0000000000100000-0x00000000005C1000-memory.dmp

      Filesize

      4.8MB