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Analysis

  • max time kernel
    96s
  • max time network
    97s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/12/2024, 00:06

General

  • Target

    201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll

  • Size

    1.5MB

  • MD5

    29fe922e1390597ec7adb9182cb31670

  • SHA1

    3610b4e0f739cc3f6f5a775f286e7c84c0450a97

  • SHA256

    201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2

  • SHA512

    3625f64c7272a758902eeb2c2f8f892fb6f434ed1f0b18229f1bc04c8619a332bd1796194264aaed4bf8028c2c5ab1ad6ff1e827d7e050902d02e390c30df788

  • SSDEEP

    24576:naM84oHVJQgsGNbBNXjo2dj7MM1ebXh040Uf5GtaudomjI23yvNHm0L4+kMRGJ/s:aM84wL7U2pIM1KhcUf5Gt3db0b491qL

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
  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Loads dropped DLL 2 IoCs
  • Network Service Discovery 1 TTPs 9 IoCs

    Attempt to gather information on host's network.

  • Drops file in System32 directory 2 IoCs
  • UPX packed file 5 IoCs

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

  • Drops file in Program Files directory 1 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 10 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
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3428
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\201036c4387369e63c11a56571f6f540874a5605592db368431ab1e86be76bb2N.dll,#1
      2⤵
      • Loads dropped DLL
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4912
      • C:\Windows\SysWOW64\arp.exe
        arp -a
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:3140
      • C:\Windows\SysWOW64\arp.exe
        arp -s 10.127.0.1 1c-dd-d2-9b-49-4f
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:4572
      • C:\Windows\SysWOW64\arp.exe
        arp -s 10.127.255.255 d6-af-f4-77-cc-ea
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:804
      • C:\Windows\SysWOW64\arp.exe
        arp -s 37.27.61.185 04-1f-f6-02-4f-8e
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:4744
      • C:\Windows\SysWOW64\arp.exe
        arp -s 224.0.0.22 42-d0-cb-88-69-ea
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:2468
      • C:\Windows\SysWOW64\arp.exe
        arp -s 224.0.0.251 a3-ef-53-34-ff-9a
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:3760
      • C:\Windows\SysWOW64\arp.exe
        arp -s 224.0.0.252 32-d9-a4-7d-50-9f
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:1928
      • C:\Windows\SysWOW64\arp.exe
        arp -s 239.255.255.250 60-25-da-5b-5d-6c
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:4520
      • C:\Windows\SysWOW64\arp.exe
        arp -s 255.255.255.255 29-17-74-ac-f7-07
        3⤵
        • Network Service Discovery
        • System Location Discovery: System Language Discovery
        PID:1852
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4912 -s 884
        3⤵
        • Program crash
        PID:1884
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 4912 -ip 4912
    1⤵
      PID:4664

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      71KB

      MD5

      4fcd7574537cebec8e75b4e646996643

      SHA1

      efa59bb9050fb656b90d5d40c942fb2a304f2a8b

      SHA256

      8ea3b17e4b783ffc0bc387b81b823bf87af0d57da74541d88ba85314bb232a5d

      SHA512

      7f1a7ef64d332a735db82506b47d84853af870785066d29ccaf4fdeab114079a9f0db400e01ba574776a0d652a248658fe1e8f9659cdced19ad6eea09644ea3e

    • memory/4912-1-0x0000000010000000-0x000000001048E000-memory.dmp

      Filesize

      4.6MB

    • memory/4912-8-0x000000001048A000-0x000000001048B000-memory.dmp

      Filesize

      4KB

    • memory/4912-7-0x0000000002990000-0x00000000029C3000-memory.dmp

      Filesize

      204KB

    • memory/4912-15-0x0000000010000000-0x000000001048E000-memory.dmp

      Filesize

      4.6MB

    • memory/4912-17-0x0000000002990000-0x00000000029C3000-memory.dmp

      Filesize

      204KB