Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/08/2024, 23:21

General

  • Target
    KRNL-REBORN/krnlss_v102.exe
  • Size 69.7MB
  • Sample240812-3cd1ga1dnd
  • SHA256 31e271dbbf255b1f77f0bcaf5dcf901901b1cf0962ee23b86974d017e94bb9ab
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 64 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 6 IoCs
  • Enumerates processes with tasklist 1 TTPs 2 IoCs
  • Hide Artifacts: Hidden Files and Directories 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\KRNL-REBORN\krnlss_v102.exe
    "C:\Users\Admin\AppData\Local\Temp\KRNL-REBORN\krnlss_v102.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3208
    • C:\Users\Admin\AppData\Local\Temp\KRNL-REBORN\krnlss_v102.exe
      "C:\Users\Admin\AppData\Local\Temp\KRNL-REBORN\krnlss_v102.exe"
      2⤵
      • Checks computer location settings
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1008
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "ver"
        3⤵
          PID:4884
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "tasklist"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4116
          • C:\Windows\system32\tasklist.exe
            tasklist
            4⤵
            • Enumerates processes with tasklist
            • Suspicious use of AdjustPrivilegeToken
            PID:4020
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v visuals /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\krnlss.exe" /f"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4216
          • C:\Windows\system32\reg.exe
            reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v visuals /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\krnlss.exe" /f
            4⤵
            • Adds Run key to start application
            PID:4460
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "attrib +h "C:\Users\Admin\AppData\Roaming\krnlss.exe""
          3⤵
          • Hide Artifacts: Hidden Files and Directories
          • Suspicious use of WriteProcessMemory
          PID:1472
          • C:\Windows\system32\attrib.exe
            attrib +h "C:\Users\Admin\AppData\Roaming\krnlss.exe"
            4⤵
            • Views/modifies file attributes
            PID:4960
        • C:\Users\Admin\AppData\Roaming\krnlss.exe
          "C:\Users\Admin\AppData\Roaming\krnlss.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:3788
          • C:\Users\Admin\AppData\Roaming\krnlss.exe
            "C:\Users\Admin\AppData\Roaming\krnlss.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:5124
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c "ver"
              5⤵
                PID:3260
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c "tasklist"
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:2388
                • C:\Windows\system32\tasklist.exe
                  tasklist
                  6⤵
                  • Enumerates processes with tasklist
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1184

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            _imaging.cp311-win_amd64.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\PIL\_imaging.cp311-win_amd64.pyd
            • Size 2.2MB
            • SHA256 eaad1713dbcae6191b925a12ce4065de247abbc06b8b1e6b36093b38d8703b29
            • MD5 SHA1 SHA512 SSDEEP

            VCRUNTIME140.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\VCRUNTIME140.dll
            • Size 116KB
            • SHA256 4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83
            • MD5 SHA1 SHA512 SSDEEP

            VCRUNTIME140_1.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\VCRUNTIME140_1.dll
            • Size 48KB
            • SHA256 a113f192195f245f17389e6ecbed8005990bcb2476ddad33f7c4c6c86327afe5
            • MD5 SHA1 SHA512 SSDEEP

            _asyncio.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_asyncio.pyd
            • Size 63KB
            • SHA256 746bc8fa88282afe19dc60e426cc0a75bea3bd137cca06a0b57a30bd31459403
            • MD5 SHA1 SHA512 SSDEEP

            _bz2.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_bz2.pyd
            • Size 82KB
            • SHA256 00b8ca9a338d2b47285c9e56d6d893db2a999b47216756f18439997fb80a56e3
            • MD5 SHA1 SHA512 SSDEEP

            _ctypes.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_ctypes.pyd
            • Size 121KB
            • SHA256 c148292328f0aab7863af82f54f613961e7cb95b7215f7a81cafaf45bd4c42b7
            • MD5 SHA1 SHA512 SSDEEP

            _decimal.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_decimal.pyd
            • Size 249KB
            • SHA256 980a63f2b39cf16910f44384398e25f24482346a482addb00de42555b17d4278
            • MD5 SHA1 SHA512 SSDEEP

            _hashlib.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_hashlib.pyd
            • Size 63KB
            • SHA256 87dd0c858620287454fd6d31d52b6a48eddbb2a08e09e8b2d9fdb0b92200d766
            • MD5 SHA1 SHA512 SSDEEP

            _lzma.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_lzma.pyd
            • Size 155KB
            • SHA256 f5e01b516c2c23035f7703e23569dec26c5616c05a929b2580ae474a5c6722c5
            • MD5 SHA1 SHA512 SSDEEP

            _multiprocessing.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_multiprocessing.pyd
            • Size 33KB
            • SHA256 975c1947798e3c39898c86675ca1eb68249f77361f41f172f9800275227213b9
            • MD5 SHA1 SHA512 SSDEEP

            _overlapped.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_overlapped.pyd
            • Size 50KB
            • SHA256 ca106e4dfdeafeabf9e98956d3d8d0cb73e109f1a96f1a7e35bc47dbd7c7e164
            • MD5 SHA1 SHA512 SSDEEP

            _queue.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_queue.pyd
            • Size 31KB
            • SHA256 3f8e7e6aa13b417acc78b63434fb1144e6319a010a9fc376c54d6e69b638fe4c
            • MD5 SHA1 SHA512 SSDEEP

            _socket.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_socket.pyd
            • Size 77KB
            • SHA256 a19e3c7c03ef1b5625790b1c9c42594909311ab6df540fbf43c6aa93300ab166
            • MD5 SHA1 SHA512 SSDEEP

            _sqlite3.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_sqlite3.pyd
            • Size 117KB
            • SHA256 ff6a2a2f38b21b7784f97d604c99961d8c07ef455f7908110a4e893835d42b76
            • MD5 SHA1 SHA512 SSDEEP

            _ssl.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_ssl.pyd
            • Size 174KB
            • SHA256 ba5388d6a6557d431e086734a3323621dc447f63ba299b0a815e5837cf869678
            • MD5 SHA1 SHA512 SSDEEP

            _tkinter.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_tkinter.pyd
            • Size 62KB
            • SHA256 6f7bdc2f60a1795b58ec7015ec262d6b234aa8d0f022185de0f52bac4adab449
            • MD5 SHA1 SHA512 SSDEEP

            _uuid.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\_uuid.pyd
            • Size 24KB
            • SHA256 e6aa7f1637e211251c9d6f467203b2b6d85e5bc2d901699f2a55af637fa89250
            • MD5 SHA1 SHA512 SSDEEP

            base_library.zip

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\base_library.zip
            • Size 1.4MB
            • SHA256 a9d7fa44e1cc77e53f453bf1ca8aba2a9582a842606a4e182c65b88b616b1a17
            • MD5 SHA1 SHA512 SSDEEP

            __init__.py

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\cv2\__init__.py
            • Size 6KB
            • SHA256 957a91bfd98ffb07a10cd789b7c5c46806568476b61e34c7ad56a00092b981a5
            • MD5 SHA1 SHA512 SSDEEP

            config-3.py

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\cv2\config-3.py
            • Size 748B
            • SHA256 de28c7b5213cca148f09469916584611b3d66c1c8c432880259d6a3a92380213
            • MD5 SHA1 SHA512

            config.py

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\cv2\config.py
            • Size 123B
            • SHA256 d9e401b9a67304d69c48a494a485d106b534e02bf5776211c09f09bd671b295d
            • MD5 SHA1 SHA512

            load_config_py3.py

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\cv2\load_config_py3.py
            • Size 271B
            • SHA256 ff583a5874be8f848e73c2f61b3a71680995926479c9bc436e6565c5cce7ca07
            • MD5 SHA1 SHA512

            libcrypto-3.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\libcrypto-3.dll
            • Size 5.0MB
            • SHA256 05fe080eab7fc535c51e10c1bd76a2f3e6217f9c91a25034774588881c3f99de
            • MD5 SHA1 SHA512 SSDEEP

            libffi-8.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\libffi-8.dll
            • Size 38KB
            • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
            • MD5 SHA1 SHA512 SSDEEP

            libssl-3.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\libssl-3.dll
            • Size 768KB
            • SHA256 2e9fbcd8f7fdc13a5179533239811456554f2b3aa2fb10e1b17be0df81c79006
            • MD5 SHA1 SHA512 SSDEEP

            libscipy_openblas64_-fb1711452d4d8cee9f276fd1449ee5c7.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\numpy.libs\libscipy_openblas64_-fb1711452d4d8cee9f276fd1449ee5c7.dll
            • Size 36.6MB
            • SHA256 39e80d3d5fd1e998cb7c5c7b5d54136af75a688dfa6c38470e8bf89b01eec134
            • MD5 SHA1 SHA512 SSDEEP

            msvcp140-8021418012832a07a8ca5105a33b1086.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\numpy.libs\msvcp140-8021418012832a07a8ca5105a33b1086.dll
            • Size 607KB
            • SHA256 85448e376dfad1859740aedaa2544b565e8a6e4e2e555de6c4638f4ab1b28843
            • MD5 SHA1 SHA512 SSDEEP

            _multiarray_tests.cp311-win_amd64.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\numpy\_core\_multiarray_tests.cp311-win_amd64.pyd
            • Size 61KB
            • SHA256 89ba17aae96f32e1f5e9114b1dd0b8ded2b9dc6c3089320e9e89ce35fd463f31
            • MD5 SHA1 SHA512 SSDEEP

            _multiarray_umath.cp311-win_amd64.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\numpy\_core\_multiarray_umath.cp311-win_amd64.pyd
            • Size 3.7MB
            • SHA256 c2800e6378610c5ea117642944faf38681005742df510c39dd3bdf38bf8a79fe
            • MD5 SHA1 SHA512 SSDEEP

            _umath_linalg.cp311-win_amd64.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\numpy\linalg\_umath_linalg.cp311-win_amd64.pyd
            • Size 106KB
            • SHA256 0e23b990234cc14f734bd1a8b7f83fef4eee4c1b76061c3e04a66e1a3356c6dd
            • MD5 SHA1 SHA512 SSDEEP

            pyexpat.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\pyexpat.pyd
            • Size 194KB
            • SHA256 c7c7564f7f874fb660a46384980a2cf28bc3e245ca83628a197ccf861eab5560
            • MD5 SHA1 SHA512 SSDEEP

            python3.DLL

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\python3.DLL
            • Size 65KB
            • SHA256 db84bc052cfb121fe4db36242ba5f1d2c031b600ef5d8d752cf25b7c02b6bac6
            • MD5 SHA1 SHA512 SSDEEP

            python311.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\python311.dll
            • Size 5.5MB
            • SHA256 0817a2a657a24c0d5fbb60df56960f42fc66b3039d522ec952dab83e2d869364
            • MD5 SHA1 SHA512 SSDEEP

            select.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\select.pyd
            • Size 29KB
            • SHA256 bae0974390945520eb99ab32486c6a964691f8f4a028ac408d98fa8fb0db7d90
            • MD5 SHA1 SHA512 SSDEEP

            sqlite3.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\sqlite3.dll
            • Size 1.5MB
            • SHA256 314bba62f4a1628b986afc94c09dc29cdaf08210eae469440fbf46bcdb86d3fd
            • MD5 SHA1 SHA512 SSDEEP

            tcl86t.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\tcl86t.dll
            • Size 1.8MB
            • SHA256 4e699ff2d6d147d0586c8c77be5a18f20ca0758f432d7b0f489223f2fa4dd221
            • MD5 SHA1 SHA512 SSDEEP

            cp1252.enc

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\tcl\encoding\cp1252.enc
            • Size 1KB
            • SHA256 741859cf238c3a63bbb20ec6ed51e46451372bb221cfff438297d261d0561c2e
            • MD5 SHA1 SHA512

            tk86t.dll

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\tk86t.dll
            • Size 1.5MB
            • SHA256 b6af038120f2b8644c7ce1e11917f410009848287622135d7e386f90d28a831c
            • MD5 SHA1 SHA512 SSDEEP

            unicodedata.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\_MEI32082\unicodedata.pyd
            • Size 1.1MB
            • SHA256 37c68617fa02a2cadced17ef724e2d450ef12a8a37215da789a4679fde1c5c02
            • MD5 SHA1 SHA512 SSDEEP

            memory/1008-1166-0x00007FF944300000-0x00007FF9463DA000-memory.dmp

            memory/5124-3261-0x00007FF9444D0000-0x00007FF9465AA000-memory.dmp

            memory/5124-3263-0x00007FF9444D0000-0x00007FF9465AA000-memory.dmp