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Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/12/2024, 08:22

General

  • Target

    2024-12-20_06e4c00a7930bed72d28d32592b5c908_bkransomware_floxif.exe

  • Size

    4.7MB

  • MD5

    06e4c00a7930bed72d28d32592b5c908

  • SHA1

    c13c125f76e52c2d979706d730fad6b58ed67406

  • SHA256

    2bfb82a8c64cafabfbbe50fa95781c1fcda2294ead0fb0dc7a2b87ca118cac48

  • SHA512

    f51af39a10f20b181207f9bd0987cb20cff013ea7fc303f69de6cd70314c3088c9cf80b8e5ad08dd5829c81afe1b7b9d19ba97abbf3fcff19d1bb752d07d4e3d

  • SSDEEP

    98304:tBe40bl9dRPenSX5gSoCC0DHDB1dE46V3u/s:a3NenqC8L/s

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
  • 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 5 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\2024-12-20_06e4c00a7930bed72d28d32592b5c908_bkransomware_floxif.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-12-20_06e4c00a7930bed72d28d32592b5c908_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:3080
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3080 -s 1124
      2⤵
      • Loads dropped DLL
      • Program crash
      PID:4888
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3080 -s 1220
      2⤵
      • Loads dropped DLL
      • Program crash
      PID:4748
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 208 -p 3080 -ip 3080
    1⤵
    • Loads dropped DLL
    PID:4932
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3080 -ip 3080
    1⤵
    • Loads dropped DLL
    PID:4964

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/3080-4-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/3080-18-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/3080-16-0x0000000000770000-0x0000000000C31000-memory.dmp

    Filesize

    4.8MB