Overview

overview

7

Static

static

3

SystemUpdate.exe

windows11-21h2-x64

7

Analysis

  • user interaction
    yes
  • max time kernel
    328s
  • max time network
    319s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260911-en
  • resource tags

    arch:x64arch:x86image:win11-20260911-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    27/10/2026, 15:06

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General

  • Target
    SystemUpdate.exe
  • Size 77.1MB
  • Sample261027-sg3vaavthw
  • SHA256 67869dac04f8536fb70303e3bb70c3343fdc69cd66142750dfcf1ac7a8739b6b
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
defense_evasiondiscoveryexecution

Malware Config

Signatures

  • Loads dropped DLL 40 IoCs
  • Contacts third-party web service commonly abused for C2 1 TTPs 6 IoCs

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

  • Looks up external IP address via web service 1 TTPs 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

    discovery
  • Discovers running processes 1 TTPs 3 IoCs

    Running process information can be used to identify security tools or plan follow-on actions.

    discovery
  • Executes a command shell one-liner 1 TTPs 5 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

    execution
  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

    discovery
  • Delays execution with timeout.exe 1 IoCs
    defense_evasion
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SystemUpdate.exe
    "C:\Users\Admin\AppData\Local\Temp\SystemUpdate.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5172
    • C:\Users\Admin\AppData\Local\Temp\SystemUpdate.exe
      "C:\Users\Admin\AppData\Local\Temp\SystemUpdate.exe"
      2⤵
      • Loads dropped DLL
      • Reads the TCP/IP host and domain name from the registry
      • Suspicious use of WriteProcessMemory
      PID:5400
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "tasklist"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:2016
        • C:\Windows\system32\tasklist.exe
          tasklist
          4⤵
          • Discovers running processes
          • Suspicious use of AdjustPrivilegeToken
          PID:760
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "tasklist"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4568
        • C:\Windows\system32\tasklist.exe
          tasklist
          4⤵
          • Discovers running processes
          • Suspicious use of AdjustPrivilegeToken
          PID:5668
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "tasklist"
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:5752
        • C:\Windows\system32\tasklist.exe
          tasklist
          4⤵
          • Discovers running processes
          • Suspicious use of AdjustPrivilegeToken
          PID:484
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c start C:\Users\Admin\AppData\Local\Temp\clean.bat
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4788
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\clean.bat
          4⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:2384
          • C:\Windows\system32\timeout.exe
            timeout /t 2
            5⤵
            • Delays execution with timeout.exe
            PID:4616

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        VCRUNTIME140.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\VCRUNTIME140.dll
        • Size 106KB
        • SHA256 a8f950b4357ec12cfccddc9094cca56a3d5244b95e09ea6e9a746489f2d58736
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        VCRUNTIME140_1.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\VCRUNTIME140_1.dll
        • Size 48KB
        • SHA256 e4b533a94e02c574780e4b333fcf0889f65ed00d39e32c0fbbda2116f185873f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _asyncio.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_asyncio.pyd
        • Size 69KB
        • SHA256 0d4fbd46f922e548060ea74c95e99dc5f19b1df69be17706806760515c1c64fe
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _brotli.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_brotli.cp312-win_amd64.pyd
        • Size 836KB
        • SHA256 1e4cf067342ee168410560db9bbba370a1b609abc028bff61a3dcc1274dfcd16
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _bz2.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_bz2.pyd
        • Size 82KB
        • SHA256 02d772c03704fe243c8de2672c210a5804d075c1f75e738d6130a173d08dfcde
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _cffi_backend.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_cffi_backend.cp312-win_amd64.pyd
        • Size 177KB
        • SHA256 9af5e4f68a41f26b726f2e9424f9d58a4f5666189f6a48be95f406b257102aec
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _ctypes.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_ctypes.pyd
        • Size 121KB
        • SHA256 bc3b83d2dc9e2f0e6386ed952384c6cf48f6eed51129a50dfd5ef6cbbc0a8fb3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _decimal.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_decimal.pyd
        • Size 247KB
        • SHA256 a28c543976aa4b6d37da6f94a280d72124b429f458d0d57b7dbcf71b4bea8f73
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _elementtree.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_elementtree.pyd
        • Size 130KB
        • SHA256 9bfb6f4a1ce9507cc6858b29f218341fa43d4b1ec77f44fdb58333170874bd22
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _hashlib.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_hashlib.pyd
        • Size 63KB
        • SHA256 e47e76d70d508b62924fe480f30e615b12fdd7745c0aac68a2cddabd07b692ae
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _lzma.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_lzma.pyd
        • Size 155KB
        • SHA256 34130d8abe27586ee315262d69af4e27429b7eab1f3131ea375c2bb62cf094be
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _multiprocessing.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_multiprocessing.pyd
        • Size 34KB
        • SHA256 fb69005b972dc3703f9ef42e8e0fddf8c835cb91f57ef9b6c66bbdf978c00a8c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _overlapped.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_overlapped.pyd
        • Size 54KB
        • SHA256 5d298bb811037b583cff6c88531f1742fae5eee47c290adb47ddbd0d6126b9cc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _queue.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_queue.pyd
        • Size 31KB
        • SHA256 2ad02d49691a629f038f48fcdee46a07c4fcc2cb0620086e7b09ac11915ae6b7
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _socket.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_socket.pyd
        • Size 81KB
        • SHA256 b38e66e6ee413e5955ef03d619cadd40fca8be035b43093d2342b6f3739e883e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _sqlite3.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_sqlite3.pyd
        • Size 121KB
        • SHA256 ff25bdbeef34d2aa420a79d3666c2660e7e3e96259d1f450f1af5268553380ec
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _ssl.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_ssl.pyd
        • Size 173KB
        • SHA256 a4ce52a9e0daddbbe7a539d1a7eda787494f2173ddcc92a3faf43b7cf597452b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _uuid.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_uuid.pyd
        • Size 24KB
        • SHA256 bb418e91e543c998d11f9e65fd2a4899b09407ff386e059a88fe2a16aed2556b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _wmi.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\_wmi.pyd
        • Size 35KB
        • SHA256 79adca5037d9145309d3bd19f7a26f7bb7da716ee86e01073c6f2a9681e33dad
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _http_writer.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\aiohttp\_http_writer.cp312-win_amd64.pyd
        • Size 43KB
        • SHA256 4831aaf297de92c195335564e4b13d3df50e3e88f25b22532c5b576ecb3a3a1e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _zstd.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\backports\zstd\_zstd.cp312-win_amd64.pyd
        • Size 597KB
        • SHA256 cab05de02f2c291ebb602a7858042e78634b2744912995b2da6eeb54aa29bab9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        base_library.zip
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\base_library.zip
        • Size 1.3MB
        • SHA256 54700e2beb8a9ba81b92035568f55cad59a6cb9b8d9fcd1623aedfd347cb007b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        INSTALLER
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\charset_normalizer-3.4.3.dist-info\INSTALLER
        • Size 4B
        • SHA256 ceebae7b8927a3227e5303cf5e0f1f7b34bb542ad7250ac03fbcde36ec2f1508
        • MD5 SHA1 SHA512
        Submit Download

        md.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\charset_normalizer\md.cp312-win_amd64.pyd
        • Size 10KB
        • SHA256 83446918c3d73fe244530b944381df1c1937edf1af85fc9a9b7409fd8060811c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        md__mypyc.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\charset_normalizer\md__mypyc.cp312-win_amd64.pyd
        • Size 125KB
        • SHA256 2705ad311dbd285a38b382ad4028356442cb53fe8bec912d22da48c2da42fafe
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        libcrypto-3.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\libcrypto-3.dll
        • Size 4.9MB
        • SHA256 2a234b5aa20c3faecf725bbb54fb33f3d94543f78fa7045408e905593e49960a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        libffi-8.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\libffi-8.dll
        • Size 38KB
        • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        libssl-3.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\libssl-3.dll
        • Size 771KB
        • SHA256 41ad1a04ca27a7959579e87fbbda87c93099616a64a0e66260c983381c5570d1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _multidict.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\multidict\_multidict.cp312-win_amd64.pyd
        • Size 79KB
        • SHA256 e60f346a10cbdb5c5eac70b98fec090db6a0f620d98ff4df388a6495c1476b9b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _helpers_c.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\propcache\_helpers_c.cp312-win_amd64.pyd
        • Size 64KB
        • SHA256 f6e3495988b8de7dd46321ce924fb9c140463e77eecff5dad080f9db770e8436
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pyexpat.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\pyexpat.pyd
        • Size 195KB
        • SHA256 e1d56ffbf5e5fab481d7a14691481b8ff5d2f4c6bf5d1a4664c832756c5942fe
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        python3.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\python3.dll
        • Size 66KB
        • SHA256 1e9224ba7190b6301ef47befa8e383d0c55700255d04a36f7dac88ea9573f2fb
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        python312.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\python312.dll
        • Size 6.6MB
        • SHA256 e7890e38256f04ee0b55ac5276bbf3ac61392c3a3ce150bb5497b709803e17ce
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        select.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\select.pyd
        • Size 30KB
        • SHA256 bc71fbdfd1441d62dd86d33ff41b35dc3cc34875f625d885c58c8dc000064dab
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        sqlite3.dll
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\sqlite3.dll
        • Size 1.4MB
        • SHA256 8aa8b909a39fcc33d1ec2ad51eac6714a318c6efd04f963d21b75d8f64809ad6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        unicodedata.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\unicodedata.pyd
        • Size 1.1MB
        • SHA256 2480a78815f619a631210e577e733c9bafecb7f608042e979423c5850ee390ff
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        _quoting_c.cp312-win_amd64.pyd
        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000014342\yarl\_quoting_c.cp312-win_amd64.pyd
        • Size 85KB
        • SHA256 0ae2c629d7568ee78d747477d5aa58a13262fbe9510195708fb77314b31e5483
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download