Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/12/2023, 04:45

General

  • Target

    05e89df3dd9b5902bc89b9f24d2f6d45.exe

  • Size

    436KB

  • MD5

    05e89df3dd9b5902bc89b9f24d2f6d45

  • SHA1

    0ae24aa08f14911ed29f737dbe02808be7ab650b

  • SHA256

    e13d84ed66c1b84715e91c2631527daa905593aac5831c54feb998c31f911932

  • SHA512

    65a631a705ce5a8245d249f74148883cab8ae487adf41428d8228dc1c6a662b37216c439c9ec827784d594c95e93e1241d4c843a36845a6281992d61c58a6ff2

  • SSDEEP

    12288:TTG2GUf8kxszOf/vRV9galubq/fLH9NLAlSaqOd38OSmvtu:Ta+8BzyJCqrdRAlSaq/F

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 33 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 1 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 51 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\05e89df3dd9b5902bc89b9f24d2f6d45.exe
    "C:\Users\Admin\AppData\Local\Temp\05e89df3dd9b5902bc89b9f24d2f6d45.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    PID:4248
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\a1l8.dll"
      2⤵
        PID:2356
      • C:\Windows\SysWOW64\regsvr32.exe
        C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\4f3r.dll"
        2⤵
          PID:4588
        • 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:4436
        • C:\Windows\SysWOW64\bffd.exe
          C:\Windows\system32\bffd.exe -s
          2⤵
          • Executes dropped EXE
          PID:692
        • C:\Windows\SysWOW64\bffd.exe
          C:\Windows\system32\bffd.exe -i
          2⤵
          • Executes dropped EXE
          PID:1600
        • C:\Windows\SysWOW64\regsvr32.exe
          C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\8b4o.dll"
          2⤵
            PID:3792
          • C:\Windows\SysWOW64\regsvr32.exe
            C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32\b4cb.dll"
            2⤵
              PID:2096
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32 C:\Windows\system32\841e.dll, Always
              2⤵
              • Loads dropped DLL
              PID:4132
          • 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:3084
            • 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:2584

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                • C:\Users\Admin\AppData\Local\Temp\h8gi24o8\p.dll

                  Filesize

                  92KB

                  MD5

                  471efa591e9d08a543c396cf5cff4559

                  SHA1

                  0a7c91c06d2ddb6b57ab3bd004c442a752eab4b2

                  SHA256

                  1e8b6e2d3807c4e43c37b1b7ccc810ad65cd0ec3bc4677c95cfd2f00e2b880c7

                  SHA512

                  99af0e6107da7960c729faa63ced5c6e23edd2a133e958948dc80b0542c29e077a8abeee9c0bd9dde41d882f4162ac08e33a1fcae428e88bff76631c4b432fd4

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

                  Filesize

                  244KB

                  MD5

                  c9df899873b131215dbb8ebd12ba1da1

                  SHA1

                  4e9540213e37a7d940ea6c8c54ba7b90a534d48c

                  SHA256

                  bed20b34947583d6da77651b4affe389f477923b35fb4c90ea2a49f6f1b793a0

                  SHA512

                  a4b4a483bf667ff09bb8a8d816e3587b0def698c88b9aea47561e172cfb8109338cd59c946fe4ae9d6ff395e9927e0745b6588c48164d1019a90bdae014a8abf

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

                  Filesize

                  99KB

                  MD5

                  22235f56265f6d33f626ffc1bde189fc

                  SHA1

                  dc0b0883f79d36734b8f0943925dc9933a225ec2

                  SHA256

                  e0b4aef17740d2b292016a9032fadd5e4e2cc67cdb6c58a6774659a34e404542

                  SHA512

                  207aeaad050971be53ba818445fe36cb2a97e32b303a5f5443ee124cee93642dabe5b72b33de89b011f883e111b67e745cdebb79fb0c825b2cf81f9c69c51f79

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

                  Filesize

                  105KB

                  MD5

                  c7959bf0f0ad5f9ad2023e61c1263c60

                  SHA1

                  981fb450a5ef1866acb44eb5925a3a73988e4668

                  SHA256

                  8dfc82ddae9c5a2bae3dafff3b50b0423e4c5fb560c77f854e08fd3d2a876583

                  SHA512

                  abd9ac87c785c77d9377c215fc526d0f1e0545c04995c62749ad33092e5c33a50745b0c4882fd7173964d7f149ad809d1a0081dc222ccc646aaad370bef88219

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

                  Filesize

                  134KB

                  MD5

                  8d5b75b643f3a9f3320195f22a167b19

                  SHA1

                  80ee3a537b6a0b5a482cb0b210b94440206e0987

                  SHA256

                  9f0478a9b757a6249a3a49f359dddd7e6c2f7de6e5ec694bb6294c72728cb549

                  SHA512

                  80961a6dd79ffe57e175cedf1feab948e64d572f51563c534fd830fac750af3ad693eeb0ef62ff464a7f9254f23a8b33c4a09e9a642eab57c19bb2640841ad06

                • C:\Windows\SysWOW64\bffd.exe

                  Filesize

                  120KB

                  MD5

                  d5632823a0dc7c140ef76b8be1931501

                  SHA1

                  5bef51a80f60468fbff2b2d5a575535fd174003b

                  SHA256

                  a038761bb7d3b168ff9d446704388861995ddfddd163d1394a8c1425d2bc2b9e

                  SHA512

                  66a58a8461fe3aca2bae3829f8104a5e1445e738a7554ad7169545c7a39e7436f2091c9dee5527203787344978a28af7a21ace152f7c7a2ef3609a23a4e186e6

                • memory/692-63-0x0000000000020000-0x0000000000022000-memory.dmp

                  Filesize

                  8KB

                • memory/692-70-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/1600-61-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/1600-60-0x00000000001C0000-0x00000000001C2000-memory.dmp

                  Filesize

                  8KB

                • memory/1600-58-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/2584-89-0x0000000010000000-0x00000000100B1000-memory.dmp

                  Filesize

                  708KB

                • memory/2584-79-0x0000000010000000-0x00000000100B1000-memory.dmp

                  Filesize

                  708KB

                • memory/2584-105-0x0000000010000000-0x00000000100B1000-memory.dmp

                  Filesize

                  708KB

                • memory/2584-80-0x0000000000AE0000-0x0000000000AE2000-memory.dmp

                  Filesize

                  8KB

                • memory/2584-97-0x0000000010000000-0x00000000100B1000-memory.dmp

                  Filesize

                  708KB

                • memory/3084-119-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-135-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-85-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-86-0x0000000000E90000-0x0000000000E92000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-87-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-69-0x0000000000E80000-0x0000000000E82000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-90-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-91-0x0000000000EA0000-0x0000000000EA2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-94-0x0000000000EB0000-0x0000000000EB2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-93-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-95-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-99-0x0000000000EC0000-0x0000000000EC2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-98-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-66-0x00000000001D0000-0x00000000001D2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-102-0x0000000000ED0000-0x0000000000ED2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-101-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-103-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-107-0x0000000000F20000-0x0000000000F22000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-106-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-194-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-110-0x0000000000F30000-0x0000000000F32000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-109-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-111-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-115-0x0000000000F40000-0x0000000000F42000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-114-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-118-0x00000000012A0000-0x00000000012A2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-117-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-65-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-122-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-123-0x00000000012B0000-0x00000000012B2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-126-0x00000000012C0000-0x00000000012C2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-125-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-127-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-131-0x00000000012D0000-0x00000000012D2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-130-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-134-0x00000000012E0000-0x00000000012E2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-133-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-68-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-139-0x00000000012F0000-0x00000000012F2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-138-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-142-0x0000000001300000-0x0000000001302000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-141-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-143-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-147-0x0000000001310000-0x0000000001312000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-146-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-150-0x0000000001320000-0x0000000001322000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-149-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-151-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-155-0x0000000001330000-0x0000000001332000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-154-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-158-0x0000000001340000-0x0000000001342000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-157-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-159-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-163-0x0000000001350000-0x0000000001352000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-162-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-166-0x0000000001360000-0x0000000001362000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-165-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-167-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-171-0x0000000001370000-0x0000000001372000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-170-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-174-0x0000000001380000-0x0000000001382000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-173-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-175-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-178-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-179-0x0000000001390000-0x0000000001392000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-183-0x00000000013A0000-0x00000000013A2000-memory.dmp

                  Filesize

                  8KB

                • memory/3084-182-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB

                • memory/3084-181-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/3084-185-0x0000000000400000-0x000000000041F000-memory.dmp

                  Filesize

                  124KB

                • memory/4132-81-0x0000000000F60000-0x0000000000F62000-memory.dmp

                  Filesize

                  8KB

                • memory/4132-78-0x0000000010000000-0x00000000100B1000-memory.dmp

                  Filesize

                  708KB

                • memory/4436-48-0x0000000000FF0000-0x0000000000FF2000-memory.dmp

                  Filesize

                  8KB

                • memory/4436-47-0x0000000010000000-0x0000000010028000-memory.dmp

                  Filesize

                  160KB