Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/01/2025, 07:24

General

  • Target

    2025-01-10_27b174d459f5e299430420d125375d68_bkransomware_floxif.exe

  • Size

    4.0MB

  • MD5

    27b174d459f5e299430420d125375d68

  • SHA1

    5c8ddccb23029f657658970d61b96faee5da765e

  • SHA256

    009ba04ee1d2115a92c304ad86d842db9efd328eda6e867709bbf5d6aca4b7fb

  • SHA512

    58e5d8e2e13ddf60bdc9a081e0ebd17800a8fb43d90323e0b08df805028dfbbee2216dae1f7167bad0bfd880eca89e766bd237df81f8dc401c7555b52bf59b92

  • SSDEEP

    98304:s4LBDHFyGeA+97aCo26vxkp3eMnSyo93S:nVZyGuICaO0yo93S

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.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • 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 5 IoCs

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

  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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
  • Suspicious use of SetWindowsHookEx 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2025-01-10_27b174d459f5e299430420d125375d68_bkransomware_floxif.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-10_27b174d459f5e299430420d125375d68_bkransomware_floxif.exe"
    1⤵
    • Checks computer location settings
    • 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
    • Suspicious use of SetWindowsHookEx
    PID:876

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/876-3-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/876-5-0x0000000000583000-0x0000000000586000-memory.dmp

    Filesize

    12KB

  • memory/876-11-0x0000000000400000-0x0000000000800000-memory.dmp

    Filesize

    4.0MB

  • memory/876-16-0x0000000000400000-0x0000000000800000-memory.dmp

    Filesize

    4.0MB

  • memory/876-17-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/876-18-0x0000000000400000-0x0000000000800000-memory.dmp

    Filesize

    4.0MB

  • memory/876-27-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/876-30-0x0000000000400000-0x0000000000800000-memory.dmp

    Filesize

    4.0MB

  • memory/876-33-0x0000000000400000-0x0000000000800000-memory.dmp

    Filesize

    4.0MB

  • memory/876-35-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/876-36-0x0000000000400000-0x0000000000800000-memory.dmp

    Filesize

    4.0MB