Analysis

  • max time kernel
    148s
  • max time network
    133s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/03/2024, 08:28

General

  • Target
    dd901d376b265f0ee7498d5a879c3492.dll
  • Size 339KB
  • Sample240325-kc87haeb91
  • SHA256 1914fea8b0c61485dd80187bd6eebda7cf2d2587e37febcd7ceceab7f7f93b1f
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 32 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 19 IoCs
  • Drops file in Windows directory 13 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 47 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\dd901d376b265f0ee7498d5a879c3492.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1772
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\dd901d376b265f0ee7498d5a879c3492.dll,#1
      2⤵
      • Writes to the Master Boot Record (MBR)
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:2092
      • C:\Windows\SysWOW64\regsvr32.exe
        C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/45l6.dll"
        3⤵
          PID:3608
        • C:\Windows\SysWOW64\regsvr32.exe
          C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/21c2.dll"
          3⤵
            PID:1540
          • C:\Windows\SysWOW64\regsvr32.exe
            C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/d0br.dll"
            3⤵
              PID:2680
            • C:\Windows\SysWOW64\regsvr32.exe
              C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/2bdo.dll"
              3⤵
                PID:3440
              • C:\Windows\SysWOW64\regsvr32.exe
                C:\Windows\system32\regsvr32.exe /s "C:\Windows\system32/2bdo.dll"
                3⤵
                • Loads dropped DLL
                • Installs/modifies Browser Helper Object
                • Modifies registry class
                PID:4184
              • C:\Windows\SysWOW64\b15d.exe
                C:\Windows\system32/b15d.exe -i
                3⤵
                • Executes dropped EXE
                PID:64
              • C:\Windows\SysWOW64\b15d.exe
                C:\Windows\system32/b15d.exe -s
                3⤵
                • Executes dropped EXE
                PID:3036
              • C:\Users\Admin\AppData\Local\Temp\h8nil4o8\mtv.exe
                C:\Users\Admin\AppData\Local\Temp\h8nil4o8\mtv.exe
                3⤵
                • Executes dropped EXE
                • Drops file in System32 directory
                • Suspicious use of SetWindowsHookEx
                PID:4336
              • C:\Windows\SysWOW64\rundll32.exe
                C:\Windows\system32\rundll32 C:\Windows\system32/b15e.dll, Always
                3⤵
                • Loads dropped DLL
                PID:5072
          • C:\Windows\SysWOW64\b15d.exe
            C:\Windows\SysWOW64\b15d.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:2948
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32 C:\Windows\system32/b15e.dll,Always
              2⤵
              • Loads dropped DLL
              • Writes to the Master Boot Record (MBR)
              • Drops file in System32 directory
              PID:2612
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4440 --field-trial-handle=3536,i,10914981530159316853,12381340356750224673,262144 --variations-seed-version /prefetch:8
            1⤵
              PID:3296

            Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

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                  Downloads

                  b.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\b.dll
                  • Size 131KB
                  • SHA256 8ec61ab66b572da91968541614d7ed530a2df5467c36ea1376ed831d550f6f8a
                  • MD5 SHA1 SHA512 SSDEEP

                  mtv.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\mtv.exe
                  • Size 136KB
                  • SHA256 7194c41ee1300aa345e1ce22eede1efd630a3ef46159feb162ae863e7cfbc7ac
                  • MD5 SHA1 SHA512 SSDEEP

                  p.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\p.dll
                  • Size 210KB
                  • SHA256 91333415d85ba7271e1c4045937bec01ff3b465ec6a6f394e5bb32b181bdb7f6
                  • MD5 SHA1 SHA512 SSDEEP

                  s.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\s.exe
                  • Size 116KB
                  • SHA256 19f65a22b46f60099a3a54dc646efc1633e84784b44353732b186aa7aeeb0a32
                  • MD5 SHA1 SHA512 SSDEEP

                  tmp.exe

                  • Path C:\Windows\Temp\tmp.exe
                  • Size 132KB
                  • SHA256 eb86b7141be03860c7fa687c4105f806241330e6e44b27f1188f1e2223f636a3
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/2092-0-0x0000000010000000-0x000000001006D000-memory.dmp

                  memory/2092-1-0x00000000005A0000-0x00000000005A2000-memory.dmp

                  memory/2612-128-0x0000000010000000-0x00000000100A5000-memory.dmp

                  memory/2612-114-0x0000000010000000-0x00000000100A5000-memory.dmp

                  memory/2612-122-0x0000000010000000-0x00000000100A5000-memory.dmp

                  memory/2612-117-0x00000000005A0000-0x00000000005A2000-memory.dmp

                  memory/2612-95-0x0000000010000000-0x00000000100A5000-memory.dmp

                  memory/2612-97-0x00000000005A0000-0x00000000005A2000-memory.dmp

                  memory/2948-138-0x0000000001070000-0x0000000001072000-memory.dmp

                  memory/2948-152-0x00000000010B0000-0x00000000010B2000-memory.dmp

                  memory/2948-111-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-112-0x0000000000E70000-0x0000000000E72000-memory.dmp

                  memory/2948-203-0x0000000000FF0000-0x0000000000FF2000-memory.dmp

                  memory/2948-115-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-116-0x0000000000E80000-0x0000000000E82000-memory.dmp

                  memory/2948-77-0x00000000005C0000-0x00000000005C2000-memory.dmp

                  memory/2948-199-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-120-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-121-0x0000000000E90000-0x0000000000E92000-memory.dmp

                  memory/2948-74-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-124-0x0000000000EA0000-0x0000000000EA2000-memory.dmp

                  memory/2948-126-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-127-0x0000000000EB0000-0x0000000000EB2000-memory.dmp

                  memory/2948-200-0x0000000000FE0000-0x0000000000FE2000-memory.dmp

                  memory/2948-130-0x0000000000EC0000-0x0000000000EC2000-memory.dmp

                  memory/2948-132-0x0000000000EA0000-0x0000000000EA2000-memory.dmp

                  memory/2948-133-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-134-0x0000000001060000-0x0000000001062000-memory.dmp

                  memory/2948-137-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-197-0x00000000013A0000-0x00000000013A2000-memory.dmp

                  memory/2948-139-0x0000000000EC0000-0x0000000000EC2000-memory.dmp

                  memory/2948-141-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-142-0x0000000001080000-0x0000000001082000-memory.dmp

                  memory/2948-145-0x0000000001090000-0x0000000001092000-memory.dmp

                  memory/2948-147-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-148-0x00000000010A0000-0x00000000010A2000-memory.dmp

                  memory/2948-151-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-196-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-154-0x00000000012D0000-0x00000000012D2000-memory.dmp

                  memory/2948-157-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-158-0x00000000012E0000-0x00000000012E2000-memory.dmp

                  memory/2948-161-0x00000000012F0000-0x00000000012F2000-memory.dmp

                  memory/2948-160-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-166-0x00000000012D0000-0x00000000012D2000-memory.dmp

                  memory/2948-165-0x0000000001300000-0x0000000001302000-memory.dmp

                  memory/2948-164-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-168-0x0000000001310000-0x0000000001312000-memory.dmp

                  memory/2948-172-0x0000000001320000-0x0000000001322000-memory.dmp

                  memory/2948-171-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-174-0x0000000001330000-0x0000000001332000-memory.dmp

                  memory/2948-177-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-178-0x0000000001340000-0x0000000001342000-memory.dmp

                  memory/2948-180-0x0000000001350000-0x0000000001352000-memory.dmp

                  memory/2948-183-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-184-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-185-0x0000000001360000-0x0000000001362000-memory.dmp

                  memory/2948-187-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/2948-188-0x0000000001370000-0x0000000001372000-memory.dmp

                  memory/2948-191-0x0000000001380000-0x0000000001382000-memory.dmp

                  memory/2948-193-0x0000000001390000-0x0000000001392000-memory.dmp

                  memory/4184-58-0x0000000010000000-0x0000000010020000-memory.dmp

                  memory/4184-59-0x0000000000A80000-0x0000000000A82000-memory.dmp

                  memory/5072-108-0x0000000010000000-0x00000000100A5000-memory.dmp

                  memory/5072-119-0x0000000000D70000-0x0000000000D72000-memory.dmp

                  memory/5072-109-0x0000000000D70000-0x0000000000D72000-memory.dmp