Analysis

  • max time kernel
    151s
  • max time network
    130s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    29/09/2026, 19:02

General

  • Target
    joker_locker_ultimate.exe
  • Size 33.0MB
  • Sample260929-xpws6ade58
  • SHA256 f50b26bb9c95e0e4b104413c8e3749e8fc0ca2000863289b66ea1d4f9975f595
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Renames multiple (350) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Loads dropped DLL 22 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Executes a command shell one-liner 1 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 6 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\joker_locker_ultimate.exe
    "C:\Users\Admin\AppData\Local\Temp\joker_locker_ultimate.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3848
    • C:\Users\Admin\AppData\Local\Temp\joker_locker_ultimate.exe
      "C:\Users\Admin\AppData\Local\Temp\joker_locker_ultimate.exe"
      2⤵
      • Disables RegEdit via registry modification
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3432
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "start "" cmd /c "cls & echo. & echo 5... & timeout /t 1 /nobreak >nul & echo 4... & timeout /t 1 /nobreak >nul & echo 3... & timeout /t 1 /nobreak >nul & echo 2... & timeout /t 1 /nobreak >nul & echo 1... & timeout /t 1 /nobreak >nul & echo. & echo nothing happened & timeout /t 2 /nobreak >nul""
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:3808
        • C:\Windows\system32\cmd.exe
          cmd /c "cls & echo. & echo 5... & timeout /t 1 /nobreak >nul & echo 4... & timeout /t 1 /nobreak >nul & echo 3... & timeout /t 1 /nobreak >nul & echo 2... & timeout /t 1 /nobreak >nul & echo 1... & timeout /t 1 /nobreak >nul & echo. & echo nothing happened & timeout /t 2 /nobreak >nul"
          4⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:1872
          • C:\Windows\system32\timeout.exe
            timeout /t 1 /nobreak
            5⤵
            • Delays execution with timeout.exe
            PID:5832
          • C:\Windows\system32\timeout.exe
            timeout /t 1 /nobreak
            5⤵
            • Delays execution with timeout.exe
            PID:1652
          • C:\Windows\system32\timeout.exe
            timeout /t 1 /nobreak
            5⤵
            • Delays execution with timeout.exe
            PID:4080
          • C:\Windows\system32\timeout.exe
            timeout /t 1 /nobreak
            5⤵
            • Delays execution with timeout.exe
            PID:2556
          • C:\Windows\system32\timeout.exe
            timeout /t 1 /nobreak
            5⤵
            • Delays execution with timeout.exe
            PID:3576
          • C:\Windows\system32\timeout.exe
            timeout /t 2 /nobreak
            5⤵
            • Delays execution with timeout.exe
            PID:2832

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        _imaging.cp311-win_amd64.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\PIL\_imaging.cp311-win_amd64.pyd
        • Size 2.5MB
        • SHA256 e04dfdb2bdba09efc4bee07924e7be18b0b324a890eae81a12509d54370d4621
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _imagingft.cp311-win_amd64.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\PIL\_imagingft.cp311-win_amd64.pyd
        • Size 2.1MB
        • SHA256 36de3f5dcf98e5d0a04c391fd6cc7ccee5cb807f6a4881e894c973ba085f8547
        • MD5 SHA1 SHA512 SSDEEP TLSH

        VCRUNTIME140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\VCRUNTIME140.dll
        • Size 121KB
        • SHA256 d5e4d9a3e835fa679450145d6a7d94e36573a509317111904d9b3712c30d9066
        • MD5 SHA1 SHA512 SSDEEP TLSH

        VCRUNTIME140_1.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\VCRUNTIME140_1.dll
        • Size 48KB
        • SHA256 1f2d41c4aa5db0bc33ebf7b66d72943a817d7ce6cbe880502a9403823633093f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _asyncio.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_asyncio.pyd
        • Size 52KB
        • SHA256 b65afa3561034213a4218e1e7103f5a59ec71d06bbebcaae2ed0a980e9a94988
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _bz2.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_bz2.pyd
        • Size 71KB
        • SHA256 c46b2979e25b66827d0361a559e12879b8a250cf5c8771a54db94e4808e00685
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _cffi_backend.cp311-win_amd64.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_cffi_backend.cp311-win_amd64.pyd
        • Size 175KB
        • SHA256 0b5c05bf3e9da14c33566d2c546fb7618ac7fc2b89365a66cfb1082ffe3d898d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _ctypes.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_ctypes.pyd
        • Size 116KB
        • SHA256 c10b0b0f800c1327cb627a342b9afc5960d436e9e08b02f5d6971da69e4722c5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _decimal.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_decimal.pyd
        • Size 237KB
        • SHA256 5566518542e3ee6dd8cbecbae76e40a30015e82cc04ee4ea768a3cc9fb53f4ce
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _elementtree.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_elementtree.pyd
        • Size 114KB
        • SHA256 b55c802837740b609c9c11bb37fb9c522b709ac8adab88d2c9931064473cf3cb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _hashlib.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_hashlib.pyd
        • Size 52KB
        • SHA256 5f17438d0e3091e6006048c873ce43e7e33d842a2a736500815a56aa8be4bf01
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _lzma.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_lzma.pyd
        • Size 149KB
        • SHA256 0369454200d4b8deb3959415aae9bb9926e681b14bcb4427e432381fe57ecb27
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _multiprocessing.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_multiprocessing.pyd
        • Size 22KB
        • SHA256 8bd02152a04833cdde54a5a16754909fefee3d25d667156b725191375db16671
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _overlapped.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_overlapped.pyd
        • Size 38KB
        • SHA256 994444b54f09d9f348ff50d5b5ebcfb36cd5da8271e3f563b41bc6e23928a6dc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _queue.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_queue.pyd
        • Size 20KB
        • SHA256 2dc5de29aea58fd5ef02d47d8590658df2fdebe8e85fb8b05cda288c330d94da
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _socket.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_socket.pyd
        • Size 66KB
        • SHA256 9bc8b64506c21e94457da274573e85777a06b67d4d6b98dddeab4b97172fcef1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _ssl.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_ssl.pyd
        • Size 163KB
        • SHA256 980f336c8b830e6e3aaa40ec8d442db61401dd88915b6c85ec278c351fe08eaf
        • MD5 SHA1 SHA512 SSDEEP TLSH

        cp1252.enc

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_tcl_data\encoding\cp1252.enc
        • Size 1KB
        • SHA256 741859cf238c3a63bbb20ec6ed51e46451372bb221cfff438297d261d0561c2e
        • MD5 SHA1 SHA512 TLSH

        logo100.gif

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_tk_data\images\logo100.gif
        • Size 2KB
        • SHA256 72f6b34d3c8f424ff0a290a793fcfbf34fd5630a916cd02e0a5dda0144b5957f
        • MD5 SHA1 SHA512 TLSH

        logo64.gif

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_tk_data\images\logo64.gif
        • Size 1KB
        • SHA256 138c240382304f350383b02ed56c69103a9431c0544eb1ec5dcd7dec7a555dd9
        • MD5 SHA1 SHA512 TLSH

        logoLarge.gif

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_tk_data\images\logoLarge.gif
        • Size 10KB
        • SHA256 0f404764d07a6ae2ef9e1e0e8eaac278b7d488d61cf1c084146f2f33b485f2ed
        • MD5 SHA1 SHA512 SSDEEP TLSH

        logoMed.gif

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_tk_data\images\logoMed.gif
        • Size 3KB
        • SHA256 4d0bd3228ab4cc3e5159f4337be969ec7b7334e265c99b7633e3daf3c3fcfb62
        • MD5 SHA1 SHA512 TLSH

        pwrdLogo100.gif

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_tk_data\images\pwrdLogo100.gif
        • Size 1KB
        • SHA256 bcc0e6458249433e8cba6c58122b7c0efa9557cbc8fb5f9392eed5d2579fc70b
        • MD5 SHA1 SHA512 TLSH

        _tkinter.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\_tkinter.pyd
        • Size 52KB
        • SHA256 2cc987f71fe6a28e8ca5fc1f14c26bd6efa59b36e91d52901c17a5e57c4f0b2d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        base_library.zip

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\base_library.zip
        • Size 1.4MB
        • SHA256 09905135cba54ec5a8452f04e9485036dffda30e68bfe3aa57dacf26f2f8fdb9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        cryptography-rust.cyclonedx.json

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\cryptography-50.0.1.dist-info\sboms\cryptography-rust.cyclonedx.json
        • Size 44KB
        • SHA256 ca81fd6162fbb9c39d1c4530c4beb49dd3f938a77cb867f82ce788def949e3ce
        • MD5 SHA1 SHA512 SSDEEP TLSH

        sbom.json

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\cryptography-50.0.1.dist-info\sboms\sbom.json
        • Size 1KB
        • SHA256 3375a1384a4782d4a871ffe6d00d22926c140ab2db7c3671087e15a1ff239234
        • MD5 SHA1 SHA512 TLSH

        _rust.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\cryptography\hazmat\bindings\_rust.pyd
        • Size 9.5MB
        • SHA256 6a42262974f0e086c1f2defaff4ccd9fb25046cf193422135e2dda5b4b29b2a2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libcrypto-3-x64.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\libcrypto-3-x64.dll
        • Size 7.6MB
        • SHA256 4ef4f59ddc79f232a76e7eee7a7fd91792974ba885011b00acada8debfc14173
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libffi-8.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\libffi-8.dll
        • Size 27KB
        • SHA256 d56b5e5aa064e35f9ae5d11d2f0833a591d946bc04b85e1772ddfa7c84eb33a3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libssl-3-x64.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\libssl-3-x64.dll
        • Size 1.5MB
        • SHA256 64e9d8e1627fbd3e683be652116c6f285982d573f5b772e5647f229cb293d597
        • MD5 SHA1 SHA512 SSDEEP TLSH

        entry_points.txt

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\numpy-2.4.6.dist-info\entry_points.txt
        • Size 220B
        • SHA256 ec26fade0c8bdac211a6c1dd003a65eb16885b925395423e93fcaa115af4052c
        • MD5 SHA1 SHA512 TLSH

        LICENSE.txt

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\numpy-2.4.6.dist-info\licenses\LICENSE.txt
        • Size 44KB
        • SHA256 a804dff0ead9fadc5293456410bcbfc32bf024be9c4513459663fb7b442d2341
        • MD5 SHA1 SHA512 SSDEEP TLSH

        LICENSE.txt

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\numpy-2.4.6.dist-info\licenses\numpy\_core\include\numpy\libdivide\LICENSE.txt
        • Size 1KB
        • SHA256 d544761558b510866c21f7e8a2d5716fca76e0b98117e3b6b86314db7244d150
        • MD5 SHA1 SHA512 TLSH

        dragon4_LICENSE.txt

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\numpy-2.4.6.dist-info\licenses\numpy\_core\src\multiarray\dragon4_LICENSE.txt
        • Size 1KB
        • SHA256 b0fd592d4ead563148e3977e7b589169d46a5ef2ff133c755a81af880a3fc919
        • MD5 SHA1 SHA512 TLSH

        LICENSE.txt

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\numpy-2.4.6.dist-info\licenses\numpy\linalg\lapack_lite\LICENSE.txt
        • Size 2KB
        • SHA256 19060ef465e1797d682ee0fc3081bd25ab1395e995e43d25c9d13c95d9a3cd6b
        • MD5 SHA1 SHA512 TLSH

        pyexpat.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\pyexpat.pyd
        • Size 198KB
        • SHA256 2078cbd699c181466f3bd50e57e509842613ebfa82de6317beab6210d13b0a65
        • MD5 SHA1 SHA512 SSDEEP TLSH

        python3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\python3.dll
        • Size 54KB
        • SHA256 8fda4948f6fc2bed1c7d1ece9596a3450c772775e48046c0bf701517d78ae9e3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        python311.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\python311.dll
        • Size 5.6MB
        • SHA256 06cb189016f6d5a593aba0e4c53ae972f2b7a257373c502e7da80f35f37dc1c0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        select.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\select.pyd
        • Size 18KB
        • SHA256 ab91970ff8458849e59711e323dc49f09bafe7a650ddcf797fd7242343ebc49d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tcl86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\tcl86t.dll
        • Size 1.8MB
        • SHA256 59488f67a8e75a5d51c7cb865436b5581fbb16014e9233b34db0c22bea6d4765
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tk86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\tk86t.dll
        • Size 1.5MB
        • SHA256 e9a5815ad39619e22d581b7124bbaa4192e701229956a2edbaffc0c420864561
        • MD5 SHA1 SHA512 SSDEEP TLSH

        unicodedata.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI00000f082\unicodedata.pyd
        • Size 1.1MB
        • SHA256 aa489115a8139de6aa0db51e2c8771c78df430fd7c3c65b714f385833ccc91fe
        • MD5 SHA1 SHA512 SSDEEP TLSH