Analysis

  • max time kernel
    103s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/01/2024, 12:27

General

  • Target

    48fad24a6419341ce64b063be81e402a.exe

  • Size

    484KB

  • MD5

    48fad24a6419341ce64b063be81e402a

  • SHA1

    aaab00c61a68acaea1f687d3291df88db3092754

  • SHA256

    e1a5b2392f673f9d652727956690a6f135f5c2d129729a23729bda78f18e32d0

  • SHA512

    680d13e3cb49bb3a5712f5f9dff27b9800bdff1287eac9219e5f97061cb99465ff0518c17d268ff31560e089e56525a56c43537d8c06b91738fb343a51e0cd40

  • SSDEEP

    12288:SLdIQpe9G51q7UeRtFB/4zRbqQeg1GNGNrUr8Jyn:SB/sG6waFBARl1mjr8wn

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 24 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Writes to the Master Boot Record (MBR) 1 TTPs 3 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in System32 directory 18 IoCs
  • Drops file in Windows directory 13 IoCs
  • Modifies registry class 47 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\48fad24a6419341ce64b063be81e402a.exe
    "C:\Users\Admin\AppData\Local\Temp\48fad24a6419341ce64b063be81e402a.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:3196
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\a1l8.dll"
      2⤵
        PID:1308
      • C:\Windows\SysWOW64\regsvr32.exe
        C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\4f3r.dll"
        2⤵
          PID:4728
        • C:\Windows\SysWOW64\regsvr32.exe
          C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\8b4o.dll"
          2⤵
            PID:4444
          • C:\Windows\SysWOW64\bffd.exe
            C:\Windows\system32\bffd.exe -i
            2⤵
            • Executes dropped EXE
            PID:3520
          • C:\Windows\SysWOW64\regsvr32.exe
            C:\Windows\system32\regsvr32.exe /s "C:\Windows\system32\8b4o.dll"
            2⤵
            • Loads dropped DLL
            • Installs/modifies Browser Helper Object
            • Modifies registry class
            PID:992
          • C:\Windows\SysWOW64\regsvr32.exe
            C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\b4cb.dll"
            2⤵
              PID:636
            • C:\Windows\SysWOW64\bffd.exe
              C:\Windows\system32\bffd.exe -s
              2⤵
              • Executes dropped EXE
              PID:3472
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32 C:\Windows\system32\841e.dll, Always
              2⤵
              • Loads dropped DLL
              PID:1580
          • C:\Windows\SysWOW64\bffd.exe
            C:\Windows\SysWOW64\bffd.exe
            1⤵
            • Drops file in Drivers directory
            • Executes dropped EXE
            • Loads dropped DLL
            • Writes to the Master Boot Record (MBR)
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:4368
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32 C:\Windows\system32\841e.dll,Always
              2⤵
              • Loads dropped DLL
              • Writes to the Master Boot Record (MBR)
              • Drops file in System32 directory
              PID:5040

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\h8nil4o8\p.dll

            Filesize

            197KB

            MD5

            972e07cb9c033a7c4b37afc898462df3

            SHA1

            add9ae3dd4d41c0582c134e74b94330ae8f2e404

            SHA256

            889b23d737bd54449fb357c07dac2a99a066a5e1d88a9ef65e1fe460aa8e26ed

            SHA512

            c62e26bb29490e7b067418d67f7ed348fe975cc99591da32f4845529e75a98242022e0b6cca75260b6d57aef78ec37218f3a2bf5add1037f115839c3a0c0b9e8

          • C:\Windows\SysWOW64\841e.dll

            Filesize

            91KB

            MD5

            6a3234cdec0b557712918afefa6f2927

            SHA1

            9e2f10b52a3ad365deda0b9fd2306bcad80c32b4

            SHA256

            f3a2d33e88e1fe93409013bddcaececcc9286fa48c39580a537a9f96688811fa

            SHA512

            69fec103b94e063fceb978fcd2bf774f78637bb98a742b004d9f9ac98a1e24f081cb157fe12ac7b75900bed35e76f18de496d137bedec378e6cc606d19956459

          • C:\Windows\SysWOW64\8b4o.dll

            Filesize

            126KB

            MD5

            253746d45bf831cfc6e2aed1ff2af08c

            SHA1

            48369bc1f8c8272e7dfb79435e0a17c64e56ca33

            SHA256

            f126432614f93e4491def0d5e51c4661c93def94200bc3b4cffb9b57033b7ce7

            SHA512

            2cabf487324326c948510bd5e723c1103edfd0bb75449316e04045c5c87e9d47c67b8593ebdc9571b2ccce5e035b8e9e93bb0ba09eba5cd0db15e1fd8267e09a

          • C:\Windows\SysWOW64\8b4o.dll

            Filesize

            62KB

            MD5

            6f9e65820c6cee96f205ad28d1dbcf63

            SHA1

            c89ebb21142b1fe46327feffab26fe83946865e5

            SHA256

            47f44e55072263b80e4d904df7e4438f83ba4339b2e51ba70bb286b0e60f5e22

            SHA512

            d280cad42b22242df9c3fee46ef716812bb4ac14f1135d75ee05644f7ae0da1d4fa17a97ac24a962c7f776074ffa9b678c3a7c30ed25a5cdb64785be6b70f246

          • C:\Windows\SysWOW64\bffd.exe

            Filesize

            72KB

            MD5

            71d54ab0e44bb3f8643736fda6cd2e1a

            SHA1

            a53c5c25c3ab03ee2ab3db6f27cfb37b2357df04

            SHA256

            18a393f962d6f8b8d4665aaebe0409a7ba1b3267d1fe3572483618e0c5823fdc

            SHA512

            4f82114b5149ea5c604c13d24cd93dbe31c67b3baadbee5124ecf5f9828ece041629b318d62b9dbf48cfe33a9537aa8174a99013f94087f62039285b3b944e3a

          • memory/992-174-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/992-47-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/1580-79-0x0000000010000000-0x00000000100B2000-memory.dmp

            Filesize

            712KB

          • memory/1580-80-0x00000000005F0000-0x00000000005F2000-memory.dmp

            Filesize

            8KB

          • memory/3472-63-0x0000000000020000-0x0000000000022000-memory.dmp

            Filesize

            8KB

          • memory/3472-62-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/3472-70-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/3520-60-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/3520-59-0x00000000001C0000-0x00000000001C2000-memory.dmp

            Filesize

            8KB

          • memory/3520-57-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-118-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-132-0x00000000012D0000-0x00000000012D2000-memory.dmp

            Filesize

            8KB

          • memory/4368-195-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-69-0x00000000006F0000-0x00000000006F2000-memory.dmp

            Filesize

            8KB

          • memory/4368-85-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-86-0x0000000000700000-0x0000000000702000-memory.dmp

            Filesize

            8KB

          • memory/4368-88-0x00000000001C0000-0x00000000001C2000-memory.dmp

            Filesize

            8KB

          • memory/4368-87-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-91-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-92-0x0000000000E70000-0x0000000000E72000-memory.dmp

            Filesize

            8KB

          • memory/4368-186-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-68-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-95-0x0000000000EB0000-0x0000000000EB2000-memory.dmp

            Filesize

            8KB

          • memory/4368-94-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-182-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-96-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-100-0x0000000000EC0000-0x0000000000EC2000-memory.dmp

            Filesize

            8KB

          • memory/4368-99-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-103-0x0000000000ED0000-0x0000000000ED2000-memory.dmp

            Filesize

            8KB

          • memory/4368-102-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-104-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-181-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-107-0x0000000000F60000-0x0000000000F62000-memory.dmp

            Filesize

            8KB

          • memory/4368-109-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-110-0x0000000000F70000-0x0000000000F72000-memory.dmp

            Filesize

            8KB

          • memory/4368-111-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-115-0x0000000000F80000-0x0000000000F82000-memory.dmp

            Filesize

            8KB

          • memory/4368-114-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-117-0x0000000000F60000-0x0000000000F62000-memory.dmp

            Filesize

            8KB

          • memory/4368-65-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-119-0x0000000000F90000-0x0000000000F92000-memory.dmp

            Filesize

            8KB

          • memory/4368-120-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-124-0x00000000012B0000-0x00000000012B2000-memory.dmp

            Filesize

            8KB

          • memory/4368-123-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-127-0x00000000012C0000-0x00000000012C2000-memory.dmp

            Filesize

            8KB

          • memory/4368-126-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-128-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-179-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-131-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-135-0x00000000012E0000-0x00000000012E2000-memory.dmp

            Filesize

            8KB

          • memory/4368-134-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-136-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-140-0x00000000012F0000-0x00000000012F2000-memory.dmp

            Filesize

            8KB

          • memory/4368-139-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-143-0x0000000001300000-0x0000000001302000-memory.dmp

            Filesize

            8KB

          • memory/4368-142-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-144-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-147-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-148-0x0000000001310000-0x0000000001312000-memory.dmp

            Filesize

            8KB

          • memory/4368-150-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-151-0x0000000001320000-0x0000000001322000-memory.dmp

            Filesize

            8KB

          • memory/4368-152-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-156-0x0000000001330000-0x0000000001332000-memory.dmp

            Filesize

            8KB

          • memory/4368-155-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-159-0x0000000001340000-0x0000000001342000-memory.dmp

            Filesize

            8KB

          • memory/4368-158-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-160-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-164-0x0000000001350000-0x0000000001352000-memory.dmp

            Filesize

            8KB

          • memory/4368-163-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-167-0x0000000001360000-0x0000000001362000-memory.dmp

            Filesize

            8KB

          • memory/4368-166-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-168-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-172-0x0000000001370000-0x0000000001372000-memory.dmp

            Filesize

            8KB

          • memory/4368-171-0x0000000010000000-0x0000000010026000-memory.dmp

            Filesize

            152KB

          • memory/4368-175-0x0000000001380000-0x0000000001382000-memory.dmp

            Filesize

            8KB

          • memory/4368-66-0x00000000001C0000-0x00000000001C2000-memory.dmp

            Filesize

            8KB

          • memory/4368-176-0x0000000000400000-0x000000000041E000-memory.dmp

            Filesize

            120KB

          • memory/4368-180-0x0000000001390000-0x0000000001392000-memory.dmp

            Filesize

            8KB

          • memory/5040-78-0x0000000010000000-0x00000000100B2000-memory.dmp

            Filesize

            712KB

          • memory/5040-105-0x0000000010000000-0x00000000100B2000-memory.dmp

            Filesize

            712KB

          • memory/5040-97-0x0000000010000000-0x00000000100B2000-memory.dmp

            Filesize

            712KB

          • memory/5040-90-0x0000000010000000-0x00000000100B2000-memory.dmp

            Filesize

            712KB

          • memory/5040-81-0x0000000000570000-0x0000000000572000-memory.dmp

            Filesize

            8KB