Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    16-12-2024 19:06

General

  • Target

    fd61dfd3efc792e8eee11592226d3e38f43ed0cbe8607a25f38253f2e9f0b918N.exe

  • Size

    271KB

  • MD5

    104e8d1eeac87bdae748957c3a1c2170

  • SHA1

    cf12406807753a8caff0dda2b855b216544a94d2

  • SHA256

    fd61dfd3efc792e8eee11592226d3e38f43ed0cbe8607a25f38253f2e9f0b918

  • SHA512

    0768a926ce27add3bc75a356059e71504cc1c824eb86c7c93922c0765b0e7f6d9045c63b47dc61f27a23f79990b4b8e95bbfce7efcb00ee1e2043a11eb2d1375

  • SSDEEP

    6144:XILqdufR6Da5zmR7BV+UdvrEFp7hKlCUx/:4B6Da5zGBjvrEH7e7/

Malware Config

Signatures

  • Floxif family
  • 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 6 IoCs
  • Loads dropped DLL 8 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • 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 System32 directory 2 IoCs
  • UPX packed file 7 IoCs

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

  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 5 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.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 12 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fd61dfd3efc792e8eee11592226d3e38f43ed0cbe8607a25f38253f2e9f0b918N.exe
    "C:\Users\Admin\AppData\Local\Temp\fd61dfd3efc792e8eee11592226d3e38f43ed0cbe8607a25f38253f2e9f0b918N.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • 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:2792
    • \??\c:\users\admin\appdata\local\temp\fd61dfd3efc792e8eee11592226d3e38f43ed0cbe8607a25f38253f2e9f0b918n.exe 
      c:\users\admin\appdata\local\temp\fd61dfd3efc792e8eee11592226d3e38f43ed0cbe8607a25f38253f2e9f0b918n.exe 
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:2756
    • C:\Windows\Resources\Themes\icsys.icn.exe
      C:\Windows\Resources\Themes\icsys.icn.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2748
      • \??\c:\windows\resources\themes\explorer.exe
        c:\windows\resources\themes\explorer.exe
        3⤵
        • Modifies visiblity of hidden/system files in Explorer
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2596
        • \??\c:\windows\resources\spoolsv.exe
          c:\windows\resources\spoolsv.exe SE
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Drops file in Windows directory
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2624
          • \??\c:\windows\resources\svchost.exe
            c:\windows\resources\svchost.exe
            5⤵
            • Modifies visiblity of hidden/system files in Explorer
            • Executes dropped EXE
            • Loads dropped DLL
            • Adds Run key to start application
            • Drops file in System32 directory
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:1008
            • \??\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:964
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:08 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1640
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 19:09 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1956
        • C:\Windows\Explorer.exe
          C:\Windows\Explorer.exe
          4⤵
            PID:2524

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      135KB

      MD5

      1954f8dfe5c17a8d56fd5befee052c3a

      SHA1

      c3af21ac64d775b9950f2229967d16ed0d6ef957

      SHA256

      bb16f5b8140e4a947d8c51d4687a2e2d55ed8686d55b54e2608d1838d53a598d

      SHA512

      43f5cf826888c535e05f19260ecda823491387024477d7f7087337764e65859cc6554bb92708f61d28746a09c616c0f21187ba8214e7c2b536552b9b21cf0a9a

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

      Filesize

      67KB

      MD5

      7574cf2c64f35161ab1292e2f532aabf

      SHA1

      14ba3fa927a06224dfe587014299e834def4644f

      SHA256

      de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

      SHA512

      4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

    • \Users\Admin\AppData\Local\Temp\fd61dfd3efc792e8eee11592226d3e38f43ed0cbe8607a25f38253f2e9f0b918n.exe 

      Filesize

      59KB

      MD5

      2a0063bb4d8669ddc603064c36bb290b

      SHA1

      49aefdf9e9f9d7c2f2af35c7f46dac6dc349618f

      SHA256

      5e84b6a41d3df263a83f67989f1401bd02cf9e13582d124cd44260e7ef9cac08

      SHA512

      9e1bce5c1c85aa4850ff7cc956147eb1bf231d8142f39152fe1b94f98be97b4f8c4853e9f5523e8b6d1c0aef60e86b02121623ba0b88583905eb69f7b14a8393

    • \Windows\Resources\Themes\explorer.exe

      Filesize

      135KB

      MD5

      a3810d7cc63dedd1cb10ebeba6618f2e

      SHA1

      0b635e523731448d37ed281e9a009e16795d6ee7

      SHA256

      5332be73f4848280f8212768d3a2e6af9c28c7c891d29a42fb23b6fd26a2ad7c

      SHA512

      20261a093c19bca27ed7456b6712cabf440e36892db2d7103369a4c51919768757e3a13e61dfead7746e7da45c4d6f8b940eb4ae2c43e34779dd80aa27cc3c5c

    • \Windows\Resources\spoolsv.exe

      Filesize

      135KB

      MD5

      80795ce16673d85a2cea017ec1356261

      SHA1

      30483b795c1157c63583817e5312c7664f40afdf

      SHA256

      4932c2617cb23a04ed277d7c03fbed90acdf18b83ea5e21c35458d6d6612e388

      SHA512

      bb20dc8b0409caf114462d52a7c8b249608e1b97dbf19c9fe9b77c3c78ad020240b737db69b65253ec2fd98e48f3616128149de3dd216c2bae530a3e6ae14ae0

    • \Windows\Resources\svchost.exe

      Filesize

      135KB

      MD5

      b48014a19842c0e8c0842ce7684653d6

      SHA1

      4d2dfd75646561e1e55495fe69794580e458786a

      SHA256

      20425ba45cc7d57b78f1303417d8f6f953130af3f8f7298ed2305ce50f19b361

      SHA512

      6964b5f93b277c1ce0c462e9591eefa5e8e49dc0bb144b6e1f46ebb4bee7ae6890460991b84f633eca49142b6e9b95aea1fdf8be8ab60cba797f59dd100335e6

    • memory/964-77-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1008-71-0x00000000002A0000-0x00000000002BF000-memory.dmp

      Filesize

      124KB

    • memory/1008-92-0x00000000002A0000-0x00000000002BF000-memory.dmp

      Filesize

      124KB

    • memory/1008-90-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2596-89-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2624-78-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2748-80-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2756-73-0x0000000000400000-0x000000000043D000-memory.dmp

      Filesize

      244KB

    • memory/2792-70-0x00000000003C0000-0x00000000003FD000-memory.dmp

      Filesize

      244KB

    • memory/2792-64-0x00000000003C0000-0x00000000003FD000-memory.dmp

      Filesize

      244KB

    • memory/2792-53-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/2792-30-0x00000000003C0000-0x00000000003DF000-memory.dmp

      Filesize

      124KB

    • memory/2792-0-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2792-81-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/2792-79-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB

    • memory/2792-17-0x00000000003C0000-0x00000000003FD000-memory.dmp

      Filesize

      244KB

    • memory/2792-9-0x000000000040E000-0x0000000000411000-memory.dmp

      Filesize

      12KB

    • memory/2792-4-0x0000000010000000-0x0000000010030000-memory.dmp

      Filesize

      192KB