Analysis

  • max time kernel
    120s
  • max time network
    94s
  • 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 03:20

General

  • Target

    f40a6510b3f8dd3a21464be0132f8090N.exe

  • Size

    3.1MB

  • MD5

    f40a6510b3f8dd3a21464be0132f8090

  • SHA1

    4d3b4d00296c53e08c8504a89434e74b807191ef

  • SHA256

    7eb237e18ea11289f5266015dee0556bb3842bb02027c19bfab1bb32e203192a

  • SHA512

    c88eac496864996dfce4b50bdac14e6345fd26daa12e684178f00fedc9791118e4f545d06abe7a0f27740e82090e52987c75b5776c3fb456498ed90224ccd458

  • SSDEEP

    49152:tf7OE8I6oJK0uzgRTvnFjStQyfvE0Z3R0nxiIq2dseYGfXD:IE8Ij3uzgFt7KtQRq2VXD

Malware Config

Signatures

  • Floxif, Floodfix

    Floxif aka FloodFix is a file-changing trojan and backdoor written in C++.

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 2 IoCs
  • Detects Floxif payload 1 IoCs
  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Executes dropped EXE 8 IoCs
  • Loads dropped DLL 2 IoCs
  • UPX packed file 5 IoCs

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

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 6 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 18 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f40a6510b3f8dd3a21464be0132f8090N.exe
    "C:\Users\Admin\AppData\Local\Temp\f40a6510b3f8dd3a21464be0132f8090N.exe"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2992
    • \??\c:\users\admin\appdata\local\temp\f40a6510b3f8dd3a21464be0132f8090n.exe 
      c:\users\admin\appdata\local\temp\f40a6510b3f8dd3a21464be0132f8090n.exe 
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3192
      • \??\c:\users\admin\appdata\local\temp\f40a6510b3f8dd3a21464be0132f8090n.exe 
        c:\users\admin\appdata\local\temp\f40a6510b3f8dd3a21464be0132f8090n.exe 
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:400
      • C:\Windows\Resources\Themes\icsys.icn.exe
        C:\Windows\Resources\Themes\icsys.icn.exe
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:3148
    • C:\Windows\Resources\Themes\icsys.icn.exe
      C:\Windows\Resources\Themes\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1504
      • \??\c:\windows\resources\themes\explorer.exe
        c:\windows\resources\themes\explorer.exe
        3⤵
        • Modifies visiblity of hidden/system files in Explorer
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4508
        • \??\c:\windows\resources\spoolsv.exe
          c:\windows\resources\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2776
          • \??\c:\windows\resources\svchost.exe
            c:\windows\resources\svchost.exe
            5⤵
            • Modifies visiblity of hidden/system files in Explorer
            • Executes dropped EXE
            • Adds Run key to start application
            • Drops file in System32 directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1416
            • \??\c:\windows\resources\spoolsv.exe
              c:\windows\resources\spoolsv.exe PR
              6⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious use of SetWindowsHookEx
              PID:2220

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\A1D26E2\7E481C0C78.tmp

    Filesize

    2.9MB

    MD5

    97c3a84fbdbda15c953b8ec31d0b35da

    SHA1

    e0e7c2ffa7c05c06349511a1147435c5215e02e9

    SHA256

    0ce150732f511567362779a52f4f12160ae1dfad49ab3a620be49647b3af0771

    SHA512

    ac8624e13d952ace856e08dcbe4a245093f151cabf395b5fdcf521ec350060de012fa4754e3f9e3b0ab0a971743e4e8c6909857c29d78be5734a7bb92fd319d4

  • C:\Users\Admin\AppData\Local\Temp\f40a6510b3f8dd3a21464be0132f8090n.exe 

    Filesize

    3.0MB

    MD5

    43c41ff496c9ebfaec5c9bfac304324e

    SHA1

    9cee50003c114869ffa5f5e24cd27afb3f5f3d2d

    SHA256

    2cd0788a40dde4e8090d8e6ec286e7ffd2fec66a20aeab860c5c3aba9a98c87e

    SHA512

    156f62c749b6a1488193812117eeeeb517d63b7b95788b73697aea9d4b43acd7c82d3d578d474b8f92ac9a9606c73efe8c8eb393c89c47a914ca70b0870c9b74

  • C:\Windows\Resources\Themes\explorer.exe

    Filesize

    135KB

    MD5

    1295033f461a655b1a062a5781c96278

    SHA1

    70289b020bebcb5b4f8be934b4284d7b65658ac2

    SHA256

    8dd39e59eff0f8881d68b51f6cd8ead530acc66c77aef6c53cec05a0f3d572ff

    SHA512

    d4008cc66e327f47323c114b12ad43babac8fce0db436e3d08434b3bf51cc349d8a60b724ae869f447d07ab2bb31bba1e00e3a5269bd4948e04216e92aa8ff9b

  • C:\Windows\Resources\Themes\icsys.icn.exe

    Filesize

    135KB

    MD5

    4a06019836eaa91dd3a90042ab9d0e60

    SHA1

    392c7985f7007e4908f6ceefbe39ae014d5e57a1

    SHA256

    5af76d57c9573c0e242c8897898280c4fe325d5dd557bf9a90e093d015154112

    SHA512

    23151d58f6a9f1743af801352cbfa130f4ffcaea03637eaeef51f785f2ac1ea1dbf923734defa983f091bb69b13a869ff22b35dcfd82e5865a892678db6ece57

  • C:\Windows\Resources\spoolsv.exe

    Filesize

    135KB

    MD5

    6c47b7fb0d910928176d8d6a72b8e32a

    SHA1

    2d5041a18a5af3cbe73167f534fb93143d262852

    SHA256

    2ac7d3ca4053a3b0990d7a66eb5c86a58fa692409ec8d46aea91a29f581516d8

    SHA512

    fc34b68ecdd02446ed4186e81f6a5f9a9392d54dea075db826fd6c7014b3a844be11ef00291112a49388ff83a6d4b2ecf7a2eee15292b6c6f6bce059ae30d10a

  • C:\Windows\Resources\svchost.exe

    Filesize

    135KB

    MD5

    2170d1f3a8c0776348bcf5663ef02115

    SHA1

    7c59ede4f9e56fcb7c77c805aab2b12ab68d11f1

    SHA256

    7259b18fa7b501b2e160b836baff4c036102116313b247fbf9502d4e07a3d130

    SHA512

    0849daad4dcf473838445bad7fdb5c667fc3857739ab38d8c222db961cd88afa56d273234f72785b8809b1bdda6d82079598def3d7eb922dfcdc72d08dac47fe

  • memory/400-51-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/400-29-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/400-28-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/400-50-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1416-81-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1504-78-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/2220-76-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/2776-77-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/2992-79-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/2992-0-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/3148-47-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/3148-66-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/3192-63-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/3192-64-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/3192-14-0x0000000010000000-0x0000000010030000-memory.dmp

    Filesize

    192KB

  • memory/3192-8-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/4508-80-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB