Analysis

  • max time kernel
    144s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/01/2024, 18:16

General

  • Target
    543b6a87d336e84e3a2b53b8979d5d84.exe
  • Size 4.2MB
  • Sample240111-wwggdadegn
  • SHA256 a347e0709c0f0d266b7c2b6f6e4f453a3d18caac5a3a27242fe9112a011ed035
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 52 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 28 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies Internet Explorer settings 1 TTPs 18 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 32 IoCs
  • Suspicious use of FindShellTrayWindow 5 IoCs
  • Suspicious use of SendNotifyMessage 2 IoCs
  • Suspicious use of SetWindowsHookEx 14 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\543b6a87d336e84e3a2b53b8979d5d84.exe
    "C:\Users\Admin\AppData\Local\Temp\543b6a87d336e84e3a2b53b8979d5d84.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Modifies Internet Explorer settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1648
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /tn:"Mediccop ½ÇÇà" /xml "C:\Users\Admin\AppData\Local\Temp\test_saved.xml"
      2⤵
      • Creates scheduled task(s)
      PID:3752
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c \DelUS.bat
      2⤵
        PID:4740
      • C:\Program Files (x86)\mediccop\MedicCop.exe
        "C:\Program Files (x86)\mediccop\MedicCop.exe" /Scan
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2236
        • C:\Program Files (x86)\mediccop\etc\mcReg.exe
          "C:\Program Files (x86)\mediccop\etc\mcReg.exe" /avscanpro /chk
          3⤵
          • Executes dropped EXE
          • Suspicious use of SetWindowsHookEx
          PID:1900
    • C:\Program Files\Internet Explorer\iexplore.exe
      "C:\Program Files\Internet Explorer\iexplore.exe" -Embedding
      1⤵
      • Modifies Internet Explorer settings
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3492
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3492 CREDAT:17410 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:3484
      • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
        "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:3492 CREDAT:17414 /prefetch:2
        2⤵
        • Modifies Internet Explorer settings
        • Suspicious use of SetWindowsHookEx
        PID:3412
    • C:\Program Files (x86)\Internet Explorer\ielowutil.exe
      "C:\Program Files (x86)\Internet Explorer\ielowutil.exe" -CLSID:{0002DF01-0000-0000-C000-000000000046} -Embedding
      1⤵
        PID:2572

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            DelUS.bat

            • Path C:\DelUS.bat
            • Size 200B
            • SHA256 eacc46ba1bccf28e0f98a9991673fcde2366db213b87f36642d1d71f5ef2604a
            • MD5 SHA1 SHA512

            kr.xml

            • Path C:\Program Files (x86)\mediccop\Lang\kr.xml
            • Size 8KB
            • SHA256 4c94097e4d2d2f8872affcd276a31e848ff3c1d58166da9cbe583e2b0dd54b99
            • MD5 SHA1 SHA512 SSDEEP

            MCEngine.dll

            • Path C:\Program Files (x86)\mediccop\MCEngine.dll
            • Size 41KB
            • SHA256 34fba87e08487bd539408ed312a0821cd71176b8acbf6aab85c10417c7f495e9
            • MD5 SHA1 SHA512 SSDEEP

            MCEngine.dll

            • Path C:\Program Files (x86)\mediccop\MCEngine.dll
            • Size 305KB
            • SHA256 a43f242d38200631162509bf3bca7f1069a816ffbee80c1485cfaecc423890b5
            • MD5 SHA1 SHA512 SSDEEP

            MedicCop.exe

            • Path C:\Program Files (x86)\mediccop\MedicCop.exe
            • Size 32KB
            • SHA256 e9987aa514cec19cd34c8fbd7e028c5f7057c8d3d4837bacb570616880bb5fa4
            • MD5 SHA1 SHA512 SSDEEP

            MedicCop.exe

            • Path C:\Program Files (x86)\mediccop\MedicCop.exe
            • Size 181KB
            • SHA256 bedb15bf11328714a61f43e6fb1b64f9952312efe945a9338a858646daabc6d9
            • MD5 SHA1 SHA512 SSDEEP

            MedicCop.exe

            • Path C:\Program Files (x86)\mediccop\MedicCop.exe
            • Size 408KB
            • SHA256 ba026aff9f8e7559633a8931ae3c8422bce44f9c6ef6b842f378ee0bf79ca10d
            • MD5 SHA1 SHA512 SSDEEP

            conf.ini

            • Path C:\Program Files (x86)\mediccop\conf.ini
            • Size 171B
            • SHA256 3d3e73db94aea6650a1b314ffbcbb42a3422daf0a739e89fd053c6476c8e85c2
            • MD5 SHA1 SHA512

            mcReg.exe

            • Path C:\Program Files (x86)\mediccop\etc\mcReg.exe
            • Size 35KB
            • SHA256 4f0a86ace2a58c542a4b7fcc736df901e726aefb498d4d99fa8e08f4ba3382a8
            • MD5 SHA1 SHA512 SSDEEP

            mcReg.exe

            • Path C:\Program Files (x86)\mediccop\etc\mcReg.exe
            • Size 85KB
            • SHA256 17d50f6c66e8cef2f7180c648789f5aa79b00ee33518ef62fa4ea3875985937e
            • MD5 SHA1 SHA512 SSDEEP

            Default.avs

            • Path C:\Program Files (x86)\mediccop\skin\Default.avs
            • Size 272KB
            • SHA256 e4a49afab92918f9e3d02e97837cca0b4f1e9e7efb67457099ecdc13dc220b49
            • MD5 SHA1 SHA512 SSDEEP

            HorizontalScrollBarLeftArrow.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\HorizontalScrollBarLeftArrow.bmp
            • Size 728B
            • SHA256 d35ba5bdfc8d4ab4dc1a92c436e29cd30ab66fd63fe970783daab7b177da9156
            • MD5 SHA1 SHA512

            HorizontalScrollBarRightArrow.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\HorizontalScrollBarRightArrow.bmp
            • Size 728B
            • SHA256 5d2a7d9dac987fae6c0d3e2716c5dce8cc06e0e8ba63d974a71c5c26e718cc30
            • MD5 SHA1 SHA512

            HorizontalScrollBarSpan.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\HorizontalScrollBarSpan.bmp
            • Size 840B
            • SHA256 f27d2b11e462dec99d1feb1255c5af76f7f5627153008d64f0f354897d1d240a
            • MD5 SHA1 SHA512

            HorizontalScrollBarThumb.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\HorizontalScrollBarThumb.bmp
            • Size 840B
            • SHA256 2fa4097cf3e6f92362264c7e463144b992e8ec1c25b97a94217782a2938c231d
            • MD5 SHA1 SHA512

            VerticleScrollBarDownArrow.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\VerticleScrollBarDownArrow.bmp
            • Size 672B
            • SHA256 c31e2c6efb7f32c0d9f525291acd7fe2ab5612c64f9b0bb6efd3f7819e8573d2
            • MD5 SHA1 SHA512

            VerticleScrollBarSpan.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\VerticleScrollBarSpan.bmp
            • Size 276B
            • SHA256 40cb66ca15c55dae3ef084c3693d1d173fd849d1fa1809635f1ece3cff4ed934
            • MD5 SHA1 SHA512

            VerticleScrollBarThumb.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\VerticleScrollBarThumb.bmp
            • Size 848B
            • SHA256 8ff6355af6466c1ced23e38593e015061354d3cb915d3c7b58477968b9e14264
            • MD5 SHA1 SHA512

            VerticleScrollBarUpArrow.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\VerticleScrollBarUpArrow.bmp
            • Size 716B
            • SHA256 19b26a8d5e2d3a988cf87a5cb182d18ee960691650269935c84e1841e3a91fe2
            • MD5 SHA1 SHA512

            VerticleScrollbarBottom.bmp

            • Path C:\Users\Admin\AppData\Local\Temp\MedicCop\list_control\VerticleScrollbarBottom.bmp
            • Size 672B
            • SHA256 46a609fb484cb0dd96ba17941baf155e192c0117954f38ac0a847c2c32bd9c63
            • MD5 SHA1 SHA512

            ChkClient.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\ChkClient.dll
            • Size 140KB
            • SHA256 5bdefe9a081e5e2f4af73891db6228a6b57e7dd320fac0ae233f5cd741db8a1f
            • MD5 SHA1 SHA512 SSDEEP

            DLLWaitForKillProgram.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\DLLWaitForKillProgram.dll
            • Size 10KB
            • SHA256 90ea8f99741fafc55f4695fdc4e2a7f1fbdb474d0545042854433db988337f09
            • MD5 SHA1 SHA512 SSDEEP

            DLLWaitForKillProgram.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\DLLWaitForKillProgram.dll
            • Size 28KB
            • SHA256 ed52bdad7b383a179b9b0e21fefdda2d72695c5263a815d5e1e0bfac6c718548
            • MD5 SHA1 SHA512 SSDEEP

            DLLWebCount_new.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\DLLWebCount_new.dll
            • Size 28KB
            • SHA256 5417af0fc8284e9745650a55803bb34217e314096dc7cedf113c960624ae08ad
            • MD5 SHA1 SHA512 SSDEEP

            IEFunctions.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\IEFunctions.dll
            • Size 3KB
            • SHA256 3122b0413f74e88518cfd1b9c6e18435dd326ca177a2374b6405df78f43e776a
            • MD5 SHA1 SHA512

            IsVista.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\IsVista.dll
            • Size 44KB
            • SHA256 17bb3331e2300aa01666fbee98b9552cec5e46212a4c5a340c0370b93df88f83
            • MD5 SHA1 SHA512 SSDEEP

            Ischeck.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\Ischeck.dll
            • Size 120KB
            • SHA256 544f3c2c03f7900539d4868437f8e08204c0b4c79357af666a1fb48d406c1ffd
            • MD5 SHA1 SHA512 SSDEEP

            Kill.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\Kill.dll
            • Size 44KB
            • SHA256 2827ef697ead9db2552f3a3fc597630727fc96f64ce3f71ae86230de4c9dcfe7
            • MD5 SHA1 SHA512 SSDEEP

            KillProcDLL.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\KillProcDLL.dll
            • Size 36KB
            • SHA256 f38c669c87f2a73768a27a01622690997e9d93d5ca3830b349bd24c3ff9f8d2e
            • MD5 SHA1 SHA512 SSDEEP

            KillProcDLL.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\KillProcDLL.dll
            • Size 32KB
            • SHA256 13e140f16fea2b0ee4ad2a39f1f52504da91fcc43b379f51f1559bfab5ab8bef
            • MD5 SHA1 SHA512 SSDEEP

            SelfDelete.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\SelfDelete.dll
            • Size 24KB
            • SHA256 c0ad2c13d48c9fe62f898da822a5f08be3bf6c4e2c1c7ffdf7634f2ca4a8859e
            • MD5 SHA1 SHA512 SSDEEP

            SetHoldData.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\SetHoldData.dll
            • Size 96KB
            • SHA256 4c8869ff8cbdd2f9a6a2d2876194869664d0e3f554886451224ff4e732136365
            • MD5 SHA1 SHA512 SSDEEP

            UserMgr.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\UserMgr.dll
            • Size 55KB
            • SHA256 955705c8c7188d06af16849e5cc3ceae79ea5d0808cc2851630a54d54bbc01f2
            • MD5 SHA1 SHA512 SSDEEP

            nsExec.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\nsExec.dll
            • Size 6KB
            • SHA256 80b2740fb3a21ffab022a96ce6b420019072f8ef3a048fd9dea4a5b64498c0c8
            • MD5 SHA1 SHA512 SSDEEP

            stack.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\stack.dll
            • Size 10KB
            • SHA256 46b4a72ae8590b0afb3304cc5c13db0502bc4c4cb02f64f37c79008c17db814f
            • MD5 SHA1 SHA512 SSDEEP

            xml.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\xml.dll
            • Size 92KB
            • SHA256 2e28fde147296c554bf0b140157bd4f48a78d82836c249cdf6b2fd85de6cc4cc
            • MD5 SHA1 SHA512 SSDEEP

            xml.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsj44CA.tmp\xml.dll
            • Size 118KB
            • SHA256 e900fcb9d598643eb0ee3e4005da925e73e70dbaa010edc4473e99ea0638b845
            • MD5 SHA1 SHA512 SSDEEP

            test_saved.xml

            • Path C:\Users\Admin\AppData\Local\Temp\test_saved.xml
            • Size 1KB
            • SHA256 4cf7b8811065904c766962e4f835ba12e30f30f07fbd810fe7255f8f38d2b714
            • MD5 SHA1 SHA512

            memory/1648-76-0x00000000022E0000-0x00000000022EA000-memory.dmp

            memory/1648-69-0x00000000022E0000-0x00000000022EC000-memory.dmp

            memory/1648-62-0x0000000002F80000-0x0000000002FA2000-memory.dmp

            memory/1648-190-0x0000000002FD0000-0x0000000002FF1000-memory.dmp

            memory/1648-54-0x00000000022E0000-0x00000000022EC000-memory.dmp

            memory/1648-157-0x00000000022E0000-0x00000000022FB000-memory.dmp

            memory/1648-181-0x0000000002F80000-0x0000000002F9E000-memory.dmp