Analysis

  • max time kernel
    94s
  • max time network
    98s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-09-2024 00:27

General

  • Target

    2024-09-14_748da875840f2e2c2690b830edfd7397_avoslocker_cobalt-strike_floxif.exe

  • Size

    665KB

  • MD5

    748da875840f2e2c2690b830edfd7397

  • SHA1

    fe0309b4cebb5ce6284e6a9a0bab1d4bc0032e56

  • SHA256

    8c84110b6de408ddc9d9e1b13bfb487543a75d8b4423581652bbfb85ed87acd5

  • SHA512

    ffdcca7cd4590d5456ab869d5e3533a4f073bce683bb9a23c8d23aaef3ee37eb3ae0e99a169dc1ae8960bbc5ed16f0c011a9b1222a25a6b4f07daa6cde546a01

  • SSDEEP

    12288:XubXcIpafJcLln5QwnVWqqPIBONhxsU/EbBjvrEH78x:Xurj90r/xsU/EhrEH7c

Malware Config

Signatures

  • 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
  • UPX packed file 3 IoCs

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

  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-09-14_748da875840f2e2c2690b830edfd7397_avoslocker_cobalt-strike_floxif.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-09-14_748da875840f2e2c2690b830edfd7397_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:3644

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

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

    Filesize

    1KB

    MD5

    34016f993a003bcbd6a1fb09565b0e3f

    SHA1

    ae8ba1021f7676655a59a92ed9f8de6766177229

    SHA256

    bc751beb9503d34f9b4731d3a611003f113176055efe2c71b7ba88b606ed0cb6

    SHA512

    d0c11d2206cf38fb97eac993a427dc609ed8bb0eccfabb03e72334d547e506e47981e036e18c43ac155a51609d2947499841fae431a0e6fd960b1b6c2dc80f92

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

    Filesize

    6KB

    MD5

    03266ed90753df0548ed588e4332a781

    SHA1

    1105ad4627bf6a21cc08c692edf0e1e6b85c55a8

    SHA256

    5cfd80aec5183eb4ee462ed0d0c0e4609cd798a3a1549b594822bebc662dcd51

    SHA512

    e94be3ee9ddc6d5534b62643d5a8de689764ab578205bb6818250650534790e246c6de6ba22b5dc503743736d03b05b49d9108fd0633a496278393e0bb0df3af

  • memory/3644-3-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/3644-65-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/3644-63-0x0000000000990000-0x0000000000A2A000-memory.dmp

    Filesize

    616KB