Analysis

  • max time kernel
    120s
  • max time network
    56s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    02/10/2024, 16:22

General

  • Target

    6b163e3d71cacd4ab904745d3c1fb61dcba4f61ca2e737bf14c266370758b583N.exe

  • Size

    434KB

  • MD5

    404250c802183c1d87eee4fb1ea99a20

  • SHA1

    1c6f628f57b10cc26ba42ab6cf248a4098e28a3a

  • SHA256

    6b163e3d71cacd4ab904745d3c1fb61dcba4f61ca2e737bf14c266370758b583

  • SHA512

    a3dee82943f48697d31629311660dbe56093d287f109cfd8238c43fdbf10dfeb9d4dc82b5eed3390e2e44292ebbd3af6552162db42a68f857e0a35d551ba11a6

  • SSDEEP

    6144:UsLqdufVUNDavZbKhDqacbA4OEwr/iEk72C0RtWsTBV+UdvrEFp7hKw:PFUNDavVSDJc8HEj74RtLBjvrEH7Z

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 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 9 IoCs

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

  • Drops file in Program Files directory 2 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.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • 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 14 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6b163e3d71cacd4ab904745d3c1fb61dcba4f61ca2e737bf14c266370758b583N.exe
    "C:\Users\Admin\AppData\Local\Temp\6b163e3d71cacd4ab904745d3c1fb61dcba4f61ca2e737bf14c266370758b583N.exe"
    1⤵
    • 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:2384
    • \??\c:\users\admin\appdata\local\temp\6b163e3d71cacd4ab904745d3c1fb61dcba4f61ca2e737bf14c266370758b583n.exe 
      c:\users\admin\appdata\local\temp\6b163e3d71cacd4ab904745d3c1fb61dcba4f61ca2e737bf14c266370758b583n.exe 
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Enumerates connected drives
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Modifies Internet Explorer settings
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2112
    • 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:320
      • \??\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:2808
        • \??\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:2744
          • \??\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:2636
            • \??\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:2668
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 16:24 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:2780
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /tn "svchost" /tr "c:\windows\resources\svchost.exe" /sc daily /st 16:25 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1752
        • C:\Windows\Explorer.exe
          C:\Windows\Explorer.exe
          4⤵
            PID:2504

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          • C:\Program Files\Common Files\System\symsrv.dll.000

            Filesize

            175B

            MD5

            1130c911bf5db4b8f7cf9b6f4b457623

            SHA1

            48e734c4bc1a8b5399bff4954e54b268bde9d54c

            SHA256

            eba08cc8182f379392a97f542b350ea0dbbe5e4009472f35af20e3d857eafdf1

            SHA512

            94e2511ef2c53494c2aff0960266491ffc0e54e75185427d1ccedae27c286992c754ca94cbb0c9ea36e3f04cd4eb7f032c551cf2d4b309f292906303f1a75fa0

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

            Filesize

            135KB

            MD5

            6974287aeb5d7c8cc65f36dd7ac7302c

            SHA1

            168a4911926cb7ee5d3edd9cc38c7bfee2742170

            SHA256

            b5d6880a18d4faa6090d074ba1f8b91157bd012b55b778430ca1771a9b6498a7

            SHA512

            a0bcecf3ca63587a771785bfbd6ab068aee691a93536b8c7fc3fc92567f36b451fc397f7b47e4600cd8b213c98b35c358c94572c8cdf80cf8f16e19b7986feec

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

            Filesize

            67KB

            MD5

            7574cf2c64f35161ab1292e2f532aabf

            SHA1

            14ba3fa927a06224dfe587014299e834def4644f

            SHA256

            de055a89de246e629a8694bde18af2b1605e4b9b493c7e4aef669dd67acf5085

            SHA512

            4db19f2d8d5bc1c7bbb812d3fa9c43b80fa22140b346d2760f090b73aed8a5177edb4bddc647a6ebd5a2db8565be5a1a36a602b0d759e38540d9a584ba5896ab

          • \Users\Admin\AppData\Local\Temp\6b163e3d71cacd4ab904745d3c1fb61dcba4f61ca2e737bf14c266370758b583n.exe 

            Filesize

            299KB

            MD5

            3adba60b5a53a6b82b736f76a1a74885

            SHA1

            e8b3172c4b9522efdcb68ef6b17434c83f274a7b

            SHA256

            384a1de17e4201b2e6be7685c8b79faed9b1632e6175c8c0128f469a6906bc15

            SHA512

            8b1161fcbb35a34d50f005a53a981790f6495eb350cb1f9eb258eb5c5f8efeb965606896f07c872c4279e3fc1e21172df1246bdfa5bcb941173f0ab04af3f2ba

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

            Filesize

            135KB

            MD5

            d5d758c4f3f443a2c960af5169e3730b

            SHA1

            39d9c42c4b3b1836ca349ab5c0bb336503e037ab

            SHA256

            57a7203209ccb9fe41bf4ea3c7c112d2c62a64466e2e421c0d1d1ac2af03a1cb

            SHA512

            6a238f6d50410c278e4bfc27a27858c4f83bf6ef0b0531ed207e4ea23ee64cb07d5fde6a2279c25d1032929a30d40c0c0a20c84141a399a98d17bb8618729d81

          • \Windows\Resources\spoolsv.exe

            Filesize

            135KB

            MD5

            8d0a07bdc59f8129d882e4e50f0fd135

            SHA1

            12236569a9ed0f0ff9f119181eca5c59bf710b9b

            SHA256

            8505dfa92d464b3f8ae09b57069e54b4864b50d780bf63a47e95108cdb1bc9da

            SHA512

            5f639341ffba52e63e702fae5bb93b0b8356fe450e2afd6be6147d4c8634911fa29e0c9f620bca7c9d7710eeb30c662a5ec8b814ce63c60f4b43a659dffb5dc5

          • \Windows\Resources\svchost.exe

            Filesize

            135KB

            MD5

            5ab89d2745f45e60e62636e4f3ff6832

            SHA1

            624b57797fe386f16d460ac76bfa11048caa8cc3

            SHA256

            c5ebcdab04a7af6e4ffd8c896794a9586b67e9d6143321120f7f65f1e7dbf697

            SHA512

            88469ba3379c033d6732cabc6f05033e99ee3b5feee7952ab20889cd931040545849f892f469faca62b7421ef7672a2ad2718d7f9679c31909d55d7400a98483

          • memory/320-83-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/320-38-0x00000000003A0000-0x00000000003BF000-memory.dmp

            Filesize

            124KB

          • memory/2112-100-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2112-99-0x0000000000400000-0x000000000049C000-memory.dmp

            Filesize

            624KB

          • memory/2112-23-0x0000000000400000-0x000000000049C000-memory.dmp

            Filesize

            624KB

          • memory/2112-22-0x000000000046C000-0x000000000046F000-memory.dmp

            Filesize

            12KB

          • memory/2112-20-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2112-120-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2112-15-0x0000000000400000-0x000000000049C000-memory.dmp

            Filesize

            624KB

          • memory/2112-77-0x000000000046C000-0x000000000046F000-memory.dmp

            Filesize

            12KB

          • memory/2112-75-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2112-116-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2112-112-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2112-108-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2112-71-0x0000000000400000-0x000000000049C000-memory.dmp

            Filesize

            624KB

          • memory/2112-104-0x0000000010000000-0x0000000010030000-memory.dmp

            Filesize

            192KB

          • memory/2384-14-0x0000000002750000-0x00000000027EC000-memory.dmp

            Filesize

            624KB

          • memory/2384-27-0x0000000000280000-0x000000000029F000-memory.dmp

            Filesize

            124KB

          • memory/2384-84-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/2384-12-0x0000000002750000-0x00000000027EC000-memory.dmp

            Filesize

            624KB

          • memory/2384-0-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/2636-73-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/2636-74-0x0000000000300000-0x000000000031F000-memory.dmp

            Filesize

            124KB

          • memory/2636-125-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/2636-128-0x0000000000300000-0x000000000031F000-memory.dmp

            Filesize

            124KB

          • memory/2668-81-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/2744-72-0x0000000000290000-0x00000000002AF000-memory.dmp

            Filesize

            124KB

          • memory/2744-82-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/2808-52-0x00000000003A0000-0x00000000003BF000-memory.dmp

            Filesize

            124KB

          • memory/2808-123-0x0000000000400000-0x000000000041F000-memory.dmp

            Filesize

            124KB

          • memory/2808-124-0x00000000003A0000-0x00000000003BF000-memory.dmp

            Filesize

            124KB