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Analysis

  • max time kernel
    15s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    28/01/2025, 01:52

General

  • Target

    2025-01-28_3671d6a9ca42f394c235d6ef8ae4a071_avoslocker_cobalt-strike_floxif.exe

  • Size

    461KB

  • MD5

    3671d6a9ca42f394c235d6ef8ae4a071

  • SHA1

    f2efbef6b83bebdb8af7e44fcaa0a99169d14439

  • SHA256

    636636122ced4a0845c494c482abb6ad7c3b7b1bda46a66ae41f723cee3a4600

  • SHA512

    c4176a1562490a63b513c48d10a8d5026c649576aa6fc7d6175730715d595c4f52604b4396bcf9714ce545ad82af44739cbd90ba01524dca8615812c1ba7aaa0

  • SSDEEP

    12288:SJRL3UmCb6U38Y9de3ANbCS0Z8MfsVdxenVWqqPIBONhxs8hmhSBjvrEH7QK:SJRL3Qp9dNNbCiMfsVf1/xs8hmCrEH7F

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 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 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2025-01-28_3671d6a9ca42f394c235d6ef8ae4a071_avoslocker_cobalt-strike_floxif.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-01-28_3671d6a9ca42f394c235d6ef8ae4a071_avoslocker_cobalt-strike_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:844

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\log.txt

    Filesize

    5KB

    MD5

    f047b012e5819ee524126e3e8757c230

    SHA1

    824716bbee5aeb50448bc18236ef40741f52cd62

    SHA256

    257cf921f790bef3f34b319301c8eea0c1eb20c86ec3f9529cd54358ba7d00e9

    SHA512

    acfef576cee3e363f48b67513298ba43f00c5316e9d2fdab22923a721f0ed8e6f34b89710db0d64f1931cef818aba9500ba693789b7ecada6b6c751204af4cf4

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

    Filesize

    67KB

    MD5

    7574cf2c64f35161ab1292e2f532aabf

    SHA1

    14ba3fa927a06224dfe587014299e834def4644f

    SHA256

    de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

    SHA512

    4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

  • memory/844-1-0x0000000000FE8000-0x0000000000FE9000-memory.dmp

    Filesize

    4KB

  • memory/844-4-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/844-62-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/844-61-0x0000000000FD0000-0x0000000001036000-memory.dmp

    Filesize

    408KB