Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/12/2023, 15:21

General

  • Target

    038876658f0a3d5c1fe4aa0eb01c44cd.exe

  • Size

    436KB

  • MD5

    038876658f0a3d5c1fe4aa0eb01c44cd

  • SHA1

    e5d3f9970a8f5b2ccf554e8ec57115376a44daac

  • SHA256

    e7a0498f63793a1462059c96f5a9c5d32c4edc02390aa2aeca7363293cfa09bc

  • SHA512

    39b01eee490e34dcf4f8397eb8526f070c2193bd208092d6969b203a48233b1afe0834ccf1d8ef47af04aba3e6b2258627e4f676bcebcebb64c5c1f7383e644b

  • SSDEEP

    6144:Y33QGwxkz6bJcnKpK7ZuVU6f+jgwU/I550ab1vjXQoR2izdVUiln9vqqqlgAqwFf:Y33Q9q2bG0VPS26Yiz0iF9PqlgG

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 29 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\038876658f0a3d5c1fe4aa0eb01c44cd.exe
    "C:\Users\Admin\AppData\Local\Temp\038876658f0a3d5c1fe4aa0eb01c44cd.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:64
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\a1l8.dll"
      2⤵
        PID:4964
      • C:\Windows\SysWOW64\regsvr32.exe
        C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\b4cb.dll"
        2⤵
          PID:2592
        • C:\Windows\SysWOW64\regsvr32.exe
          C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\4f3r.dll"
          2⤵
            PID:4088
          • C:\Windows\SysWOW64\regsvr32.exe
            C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\8b4o.dll"
            2⤵
              PID:4988
            • 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:3996
            • C:\Windows\SysWOW64\bffd.exe
              C:\Windows\system32\bffd.exe -i
              2⤵
              • Executes dropped EXE
              PID:3908
            • C:\Windows\SysWOW64\bffd.exe
              C:\Windows\system32\bffd.exe -s
              2⤵
              • Executes dropped EXE
              PID:3080
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32 C:\Windows\system32\841e.dll, Always
              2⤵
              • Loads dropped DLL
              PID:2040
          • 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:3924
            • 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:4312

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

                Loading Replay Monitor...

                Downloads

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

                  Filesize

                  135KB

                  MD5

                  5605002081a7a9518917514e8dc328a4

                  SHA1

                  655a19e3094e6ff268b83125e160be304310c598

                  SHA256

                  a00e0476a445fcb01d2e0e994a14eab203fb7c693ed38053e87b310e444830c8

                  SHA512

                  3a94e12091da34bb1bec8622b36bef91b58a6605ac4fdd83e0dabb2fad210534ae090f7552ea63485c2468a658066fba3f5052f8ea2454b8b13c18056e0fb809

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

                  Filesize

                  217KB

                  MD5

                  22067cb22570d1cbc492f3ab4920362f

                  SHA1

                  a76e03c5f3ac81285c9d465a8e3c66c88a30cd5f

                  SHA256

                  d911fc009ec8f7906e321c84217d50ad5093cc89fd168c8383872756b5d29bfb

                  SHA512

                  a4f30f3f89e095067fc72fbf83a8eac3bc9260d44b881004e047addf08658d70f69c6e415b8374badb1b77c824433c0eee6580ba2a92678fbb226803b65c1a74

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

                  Filesize

                  65KB

                  MD5

                  b714fcd0ade2c8327e41ea232b0a96dd

                  SHA1

                  2ac173cfd5df8045d2e32710e62fbddb22e43e0f

                  SHA256

                  bea4738eda4fae2286c9f858dbea86a13f1690170218266d9e5a600b1daee999

                  SHA512

                  2dacb0068f55e6c15eee2c7cec3213278b357372593c7ec77751912c05dad72cacf2473a51b448992ff7f01b87e6585a7b357d8e44ae692cd24afe222c711868

                • C:\Windows\SysWOW64\bffd.exe

                  Filesize

                  92KB

                  MD5

                  8825c4d8bb49c34322a96b8350eb268a

                  SHA1

                  38a6ef0ba7b6ad29cfdd21108556090642202795

                  SHA256

                  a9c93784d8b85b88dba509d6b95e30abd7a7108fc23f846c5e289a40bb96f347

                  SHA512

                  a6418bcfe74c4386306c0e61a825d81da0b30ae187f6752f48eb443039aae351a92e31261f9ef1eaf98f8719c9c5aa95fda5760fe432d56f99086d84f4364dc2

                • memory/2040-80-0x0000000000E70000-0x0000000000E72000-memory.dmp

                  Filesize

                  8KB

                • memory/2040-77-0x0000000010000000-0x00000000100B2000-memory.dmp

                  Filesize

                  712KB

                • memory/3080-63-0x0000000000020000-0x0000000000022000-memory.dmp

                  Filesize

                  8KB

                • memory/3080-67-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3908-58-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3908-60-0x00000000001C0000-0x00000000001C2000-memory.dmp

                  Filesize

                  8KB

                • memory/3908-61-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-122-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-131-0x00000000012C0000-0x00000000012C2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-185-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-186-0x0000000000FF0000-0x0000000000FF2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-183-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-73-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-75-0x0000000000C10000-0x0000000000C12000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-85-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-86-0x0000000000FA0000-0x0000000000FA2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-87-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-181-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-90-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-91-0x0000000000FB0000-0x0000000000FB2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-93-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-98-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-99-0x0000000000FC0000-0x0000000000FC2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-180-0x0000000000FE0000-0x0000000000FE2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-103-0x0000000000FD0000-0x0000000000FD2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-102-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-104-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-107-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-108-0x0000000001260000-0x0000000001262000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-110-0x0000000001270000-0x0000000001272000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-111-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-114-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-115-0x0000000001280000-0x0000000001282000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-117-0x0000000001290000-0x0000000001292000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-118-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-120-0x0000000001270000-0x0000000001272000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-65-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-123-0x00000000012A0000-0x00000000012A2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-125-0x00000000012B0000-0x00000000012B2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-126-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-129-0x0000000001290000-0x0000000001292000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-130-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-178-0x0000000001380000-0x0000000001382000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-133-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-134-0x00000000012D0000-0x00000000012D2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-135-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-138-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-139-0x00000000012E0000-0x00000000012E2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-140-0x00000000012B0000-0x00000000012B2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-143-0x00000000012F0000-0x00000000012F2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-142-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-144-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-147-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-148-0x0000000001300000-0x0000000001302000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-149-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-151-0x0000000001310000-0x0000000001312000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-154-0x0000000001320000-0x0000000001322000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-155-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-159-0x0000000001330000-0x0000000001332000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-158-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-66-0x00000000001D0000-0x00000000001D2000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-161-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-162-0x0000000001340000-0x0000000001342000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-163-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-166-0x0000000001350000-0x0000000001352000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-167-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-169-0x0000000001360000-0x0000000001362000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-170-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3924-173-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3924-174-0x0000000001370000-0x0000000001372000-memory.dmp

                  Filesize

                  8KB

                • memory/3924-175-0x0000000000400000-0x000000000041E000-memory.dmp

                  Filesize

                  120KB

                • memory/3996-47-0x0000000010000000-0x0000000010026000-memory.dmp

                  Filesize

                  152KB

                • memory/3996-48-0x00000000028F0000-0x00000000028F2000-memory.dmp

                  Filesize

                  8KB

                • memory/4312-100-0x0000000010000000-0x00000000100B2000-memory.dmp

                  Filesize

                  712KB

                • memory/4312-89-0x0000000010000000-0x00000000100B2000-memory.dmp

                  Filesize

                  712KB

                • memory/4312-81-0x0000000001400000-0x0000000001402000-memory.dmp

                  Filesize

                  8KB

                • memory/4312-79-0x0000000010000000-0x00000000100B2000-memory.dmp

                  Filesize

                  712KB