Analysis

  • max time kernel
    120s
  • max time network
    117s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/08/2024, 03:59

General

  • Target
    307414151e44eed576edbaced6795160N.exe
  • Size 136KB
  • Sample240820-ej5j1asekh
  • SHA256 5bb4b8c4dd1960eb09e903347449cc364513ce416a217db2ab9ecb504d4656c0
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Floxif, Floodfix

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

  • Modifies firewall policy service 3 TTPs 4 IoCs
  • Detects Floxif payload 1 IoCs
  • Drops file in Drivers directory 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.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 11 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • UPX packed file 22 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • Maps connected drives based on registry 3 TTPs 8 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 IoCs
  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\307414151e44eed576edbaced6795160N.exe
    "C:\Users\Admin\AppData\Local\Temp\307414151e44eed576edbaced6795160N.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2696
    • C:\Users\Admin\AppData\Local\Temp\307414151e44eed576edbaced6795160N.exe
      C:\Users\Admin\AppData\Local\Temp\307414151e44eed576edbaced6795160N.exe
      2⤵
      • Modifies firewall policy service
      • Loads dropped DLL
      • Adds Run key to start application
      • Maps connected drives based on registry
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4424
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram 1.exe 1 ENABLE
        3⤵
        • Modifies Windows Firewall
        • Loads dropped DLL
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:3764
      • C:\Windows\winsvc32.exe
        "C:\Windows\winsvc32.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Enumerates connected drives
        • Maps connected drives based on registry
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3004
        • C:\Windows\winsvc32.exe
          C:\Windows\winsvc32.exe
          4⤵
          • Drops file in Drivers directory
          • Executes dropped EXE
          • Loads dropped DLL
          • Enumerates connected drives
          • Maps connected drives based on registry
          • Drops file in Program Files directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1480

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        symsrv.dll.000

        • Path C:\PROGRA~1\COMMON~1\System\symsrv.dll.000
        • Size 175B
        • SHA256 eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1
        • MD5 SHA1 SHA512

        symsrv.dll

        • Path C:\Program Files\Common Files\System\symsrv.dll
        • Size 67KB
        • SHA256 de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085
        • MD5 SHA1 SHA512 SSDEEP

        winsvc32.exe

        • Path C:\Windows\winsvc32.exe
        • Size 136KB
        • SHA256 5bb4b8c4dd1960eb09e903347449cc364513ce416a217db2ab9ecb504d4656c0
        • MD5 SHA1 SHA512 SSDEEP

        memory/1480-43-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/1480-68-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/1480-56-0x00000000004C0000-0x00000000004F0000-memory.dmp

        memory/1480-57-0x00000000004C0000-0x00000000004F0000-memory.dmp

        memory/1480-69-0x00000000004C0000-0x00000000004F0000-memory.dmp

        memory/1480-75-0x00000000004C0000-0x00000000004F0000-memory.dmp

        memory/1480-48-0x00000000004C0000-0x00000000004F0000-memory.dmp

        memory/1480-39-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/1480-50-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/1480-63-0x00000000004C0000-0x00000000004F0000-memory.dmp

        memory/2696-16-0x00000000001C0000-0x00000000001F0000-memory.dmp

        memory/2696-14-0x0000000010000000-0x0000000010018000-memory.dmp

        memory/2696-4-0x00000000001C0000-0x00000000001F0000-memory.dmp

        memory/3004-32-0x0000000000540000-0x0000000000570000-memory.dmp

        memory/3004-29-0x00000000001C0000-0x00000000001F0000-memory.dmp

        memory/3004-33-0x0000000000540000-0x0000000000570000-memory.dmp

        memory/3004-47-0x00000000001C0000-0x00000000001F0000-memory.dmp

        memory/3004-41-0x0000000010000000-0x0000000010018000-memory.dmp

        memory/3764-38-0x0000000010000000-0x0000000010030000-memory.dmp

        memory/3764-37-0x0000000010000000-0x0000000010030000-memory.dmp

        memory/4424-35-0x00000000008C0000-0x00000000008F0000-memory.dmp

        memory/4424-13-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/4424-21-0x00000000008C0000-0x00000000008F0000-memory.dmp

        memory/4424-20-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/4424-12-0x0000000000400000-0x0000000000454000-memory.dmp