Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    142s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/06/2026, 10:17

General

  • Target
    Cwelium.exe
  • Size 13.6MB
  • Sample260622-mbktmabv2w
  • SHA256 44647152284cb7caed6cfe797875f31f1c4cb1f170d4ee58e8e1510def68697a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10

Malware Config

Signatures

  • Loads dropped DLL 23 IoCs
  • Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 6 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Cwelium.exe
    "C:\Users\Admin\AppData\Local\Temp\Cwelium.exe"
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:5532
    • C:\Users\Admin\AppData\Local\Temp\Cwelium.exe
      C:\Users\Admin\AppData\Local\Temp\Cwelium.exe
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:5924
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c cls
        3⤵
          PID:3880
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c cls
          3⤵
            PID:2012
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c cls
            3⤵
              PID:5668
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c cls
              3⤵
                PID:5812
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c cls
                3⤵
                  PID:4316
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /c cls
                  3⤵
                    PID:4620

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

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                    Downloads

                    VCRUNTIME140_1.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\VCRUNTIME140_1.dll
                    • Size 48KB
                    • SHA256 a113f192195f245f17389e6ecbed8005990bcb2476ddad33f7c4c6c86327afe5
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _bz2.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_bz2.pyd
                    • Size 83KB
                    • SHA256 cb15d6cc7268d3a0bd17d9d9cec330a7c1768b1c911553045c73bc6920de987f
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _ctypes.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_ctypes.pyd
                    • Size 122KB
                    • SHA256 6c5f31bef3fdbff31beac0b1a477be880dda61346d859cf34ca93b9291594d93
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _hashlib.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_hashlib.pyd
                    • Size 64KB
                    • SHA256 43acecdc00dd5f9a19b48ff251106c63c975c732b9a2a7b91714642f76be074d
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _ssl.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_ssl.pyd
                    • Size 174KB
                    • SHA256 fa5e6fe9545f83704f78316e27446a0026fbebb9c0c3c63faed73a12d89784d4
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _uuid.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_uuid.pyd
                    • Size 25KB
                    • SHA256 8ae23bfa84ce64c3240c61bedb06172bfd76be2ad30788d4499cb24047fce09f
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _wmi.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\_wmi.pyd
                    • Size 36KB
                    • SHA256 73b7ee3156ef63d6eb7df9900ef3d200a276df61a70d08bd96f5906c39a3ac32
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    cacert.pem

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\certifi\cacert.pem
                    • Size 292KB
                    • SHA256 94edeb66e91774fcae93a05650914e29096259a5c7e871a1f65d461ab5201b47
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    libcrypto-3.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\libcrypto-3.dll
                    • Size 5.0MB
                    • SHA256 4e5d5d20d6d31e72ab341c81e97b89e514326c4c861b48638243bdf0918cfa43
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    libffi-8.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\libffi-8.dll
                    • Size 38KB
                    • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    libssl-3.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\libssl-3.dll
                    • Size 774KB
                    • SHA256 2e4d35b681a172d3298caf7dc670451be7a8ba27c26446efc67470742497a950
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    tls-client-64.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\tls_client\dependencies\tls-client-64.dll
                    • Size 17.8MB
                    • SHA256 b177778656455f6b8482154238d323a3de4d74f2a8b7a62bd973251a259edb87
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    unicodedata.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\unicodedata.pyd
                    • Size 1.1MB
                    • SHA256 bf669344d1b1c607d10304be47d2a2fb572e043109181e2c5c1038485af0c3d7
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    backend_c.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\ONEFIL~1\zstandard\backend_c.pyd
                    • Size 508KB
                    • SHA256 641e0b0fa75764812fff544c174f7c4838b57f6272eaae246eb7c483a0a35afc
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    Cwelium.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\Cwelium.dll
                    • Size 15.2MB
                    • SHA256 6154e8358ee068558b9e9b06737f696651d796697cda15debc4164eebc6d3302
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _lzma.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\_lzma.pyd
                    • Size 156KB
                    • SHA256 a46189c5bd0302029847fed934f481835cb8d06470ea3d6b97ada7d325218a9f
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _queue.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\_queue.pyd
                    • Size 31KB
                    • SHA256 0a6acfd24dfbaa777460c6d003f71af473d5415607807973a382512f77d075fa
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    _socket.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\_socket.pyd
                    • Size 81KB
                    • SHA256 67aca001d36f2fce6d88dbf46863f60c0b291395b6777c22b642198f98184ba3
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    md.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\charset_normalizer\md.pyd
                    • Size 10KB
                    • SHA256 ecf12e2c0a00c0ed4e2343ea956d78eed55e5a36ba49773633b2dfe7b04335c0
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    md__mypyc.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\charset_normalizer\md__mypyc.pyd
                    • Size 120KB
                    • SHA256 4107b1d6f11d842074a9f21323290bbe97e8eed4aa778fbc348ee09cc4fa4637
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    python312.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\python312.dll
                    • Size 6.6MB
                    • SHA256 c045b57348c21f5f810bae60654ae39490846b487378e917595f1f95438f9546
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    select.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\select.pyd
                    • Size 30KB
                    • SHA256 00bd8bb6dec8c291ec14c8ddfb2209d85f96db02c7a3c39903803384ff3a65e5
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    vcruntime140.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\onefile_5532_134265970747107390\vcruntime140.dll
                    • Size 116KB
                    • SHA256 4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    memory/5532-74-0x00007FF7259B0000-0x00007FF726774000-memory.dmp

                    memory/5532-124-0x00007FF7259B0000-0x00007FF726774000-memory.dmp

                    memory/5924-75-0x00007FF7259B0000-0x00007FF726774000-memory.dmp

                    memory/5924-77-0x00007FF9ED730000-0x00007FF9EE8BF000-memory.dmp

                    memory/5924-88-0x00007FF9EFB60000-0x00007FF9F0AC2000-memory.dmp

                    memory/5924-118-0x00007FF7259B0000-0x00007FF726774000-memory.dmp

                    memory/5924-119-0x00007FF9EFB60000-0x00007FF9F0AC2000-memory.dmp

                    memory/5924-120-0x00007FF9ED730000-0x00007FF9EE8BF000-memory.dmp

                    memory/5924-76-0x00007FF9EFB60000-0x00007FF9F0AC2000-memory.dmp