Analysis

  • user interaction
    yes
  • max time kernel
    148s
  • max time network
    126s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    06/10/2026, 16:58

General

  • Target
    ransom_fast.exe
  • Size 14.5MB
  • Sample261006-vg29vsstbx
  • SHA256 7b14c3fba1f49b232b1377001fc75165efaca40c48353ba307dc5a11577c9aaf
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (2945) files with added filename extension

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

  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

  • Loads dropped DLL 18 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Enumerates connected drives 3 TTPs 25 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • 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.

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 3 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\ransom_fast.exe
    "C:\Users\Admin\AppData\Local\Temp\ransom_fast.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4276
    • C:\Users\Admin\AppData\Local\Temp\ransom_fast.exe
      "C:\Users\Admin\AppData\Local\Temp\ransom_fast.exe"
      2⤵
      • Loads dropped DLL
      • Enumerates connected drives
      • Suspicious use of WriteProcessMemory
      PID:3284
      • C:\Windows\SYSTEM32\vssadmin.exe
        vssadmin delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:4988
      • C:\Windows\System32\Wbem\wmic.exe
        wmic shadowcopy delete
        3⤵
        • Reads the TCP/IP host and domain name from the registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4956
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command "Get-WmiObject Win32_ShadowCopy | ForEach-Object { $_.Delete() }"
        3⤵
        • Enumerates connected drives
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4968
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:5340
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:904
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3972
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2960
  • C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Public\Desktop\READ_ME_TO_DECRYPT.txt
    1⤵
    • Opens file in notepad (likely ransom note)
    PID:2380

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        READ_ME_TO_DECRYPT.txt

        • Path C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\sr-Cyrl-BA\READ_ME_TO_DECRYPT.txt
        • Size 343B
        • SHA256 dfcae131e98d75fe8c8df86a64c73f11fd6cb38f3b2ba9c981d46cfdbdfdb69b
        • MD5 SHA1 SHA512 TLSH

        VCRUNTIME140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\VCRUNTIME140.dll
        • Size 121KB
        • SHA256 d5e4d9a3e835fa679450145d6a7d94e36573a509317111904d9b3712c30d9066
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _bz2.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_bz2.pyd
        • Size 71KB
        • SHA256 c46b2979e25b66827d0361a559e12879b8a250cf5c8771a54db94e4808e00685
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _cffi_backend.cp311-win_amd64.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_cffi_backend.cp311-win_amd64.pyd
        • Size 175KB
        • SHA256 0b5c05bf3e9da14c33566d2c546fb7618ac7fc2b89365a66cfb1082ffe3d898d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _ctypes.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_ctypes.pyd
        • Size 116KB
        • SHA256 c10b0b0f800c1327cb627a342b9afc5960d436e9e08b02f5d6971da69e4722c5
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _decimal.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_decimal.pyd
        • Size 237KB
        • SHA256 5566518542e3ee6dd8cbecbae76e40a30015e82cc04ee4ea768a3cc9fb53f4ce
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _hashlib.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_hashlib.pyd
        • Size 52KB
        • SHA256 5f17438d0e3091e6006048c873ce43e7e33d842a2a736500815a56aa8be4bf01
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _lzma.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_lzma.pyd
        • Size 149KB
        • SHA256 0369454200d4b8deb3959415aae9bb9926e681b14bcb4427e432381fe57ecb27
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _multiprocessing.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_multiprocessing.pyd
        • Size 22KB
        • SHA256 8bd02152a04833cdde54a5a16754909fefee3d25d667156b725191375db16671
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _queue.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_queue.pyd
        • Size 20KB
        • SHA256 2dc5de29aea58fd5ef02d47d8590658df2fdebe8e85fb8b05cda288c330d94da
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _socket.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_socket.pyd
        • Size 66KB
        • SHA256 9bc8b64506c21e94457da274573e85777a06b67d4d6b98dddeab4b97172fcef1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _ssl.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_ssl.pyd
        • Size 163KB
        • SHA256 980f336c8b830e6e3aaa40ec8d442db61401dd88915b6c85ec278c351fe08eaf
        • MD5 SHA1 SHA512 SSDEEP TLSH

        auto.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\auto.tcl
        • Size 21KB
        • SHA256 517204ee436d08efc287abc97433c3bffcaf42ec6592a3009b9fd3b985ad772c
        • MD5 SHA1 SHA512 SSDEEP TLSH

        clock.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\clock.tcl
        • Size 130KB
        • SHA256 1947f8b188ab4ab6aa72ea68a58d2d9add0894fdf320f6b074eae0f198368fb7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        cp1252.enc

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\encoding\cp1252.enc
        • Size 1KB
        • SHA256 741859cf238c3a63bbb20ec6ed51e46451372bb221cfff438297d261d0561c2e
        • MD5 SHA1 SHA512 TLSH

        history.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\history.tcl
        • Size 8KB
        • SHA256 5123db837eadf45712ea7d449bc40bfd3e8e16d3d71e7d0ce9a32f164973d767
        • MD5 SHA1 SHA512 SSDEEP TLSH

        init.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\init.tcl
        • Size 25KB
        • SHA256 331bcf0f9f635bd57c3384f2237260d074708b0975c700cfcbdb285f5f59ab1f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        package.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\package.tcl
        • Size 23KB
        • SHA256 f46ab61cdebe3aa45fa7e61a48930d64a0d0e7e94d04d6bf244f48c36cafe948
        • MD5 SHA1 SHA512 SSDEEP TLSH

        parray.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\parray.tcl
        • Size 844B
        • SHA256 e269029c8263e3cbc1920c3604ecdcf15edccb208a0d68f9eb42b73954d620c0
        • MD5 SHA1 SHA512 TLSH

        safe.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\safe.tcl
        • Size 41KB
        • SHA256 c21dce3ab31893118bbed01e559070f1d3541877fee331bd45f5bf4300ed9654
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tclIndex

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tcl_data\tclIndex
        • Size 5KB
        • SHA256 ddf7e42def37888ad0a564aa4f8ca95f4eec942cebebfca851d35515104d5c89
        • MD5 SHA1 SHA512 SSDEEP TLSH

        _tkinter.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\_tkinter.pyd
        • Size 52KB
        • SHA256 2cc987f71fe6a28e8ca5fc1f14c26bd6efa59b36e91d52901c17a5e57c4f0b2d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        base_library.zip

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\base_library.zip
        • Size 1.4MB
        • SHA256 1bc29162e17ccc223c4d959c5bc857b9f0ca4b2e0a39aa7919b4e0f5e84e9179
        • MD5 SHA1 SHA512 SSDEEP TLSH

        INSTALLER

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\cryptography-50.0.1.dist-info\INSTALLER
        • Size 4B
        • SHA256 ceebae7b8927a3227e5303cf5e0f1f7b34bb542ad7250ac03fbcde36ec2f1508
        • MD5 SHA1 SHA512

        METADATA

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\cryptography-50.0.1.dist-info\METADATA
        • Size 4KB
        • SHA256 8e9b5570da4686848ee5c6bb83fffc224bcddf9793136731dd050ce0c05fffe2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RECORD

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\cryptography-50.0.1.dist-info\RECORD
        • Size 17KB
        • SHA256 8ad4bd8111d316052dfdba137cbe85fd546242473e937291c729a29a4c989c37
        • MD5 SHA1 SHA512 SSDEEP TLSH

        WHEEL

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\cryptography-50.0.1.dist-info\WHEEL
        • Size 96B
        • SHA256 9efe56059dbb731c438c822ac4132a2b670e174db90f09059aa246a8bdd2a575
        • MD5 SHA1 SHA512 TLSH

        LICENSE

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\cryptography-50.0.1.dist-info\licenses\LICENSE
        • Size 197B
        • SHA256 3e0c7c091a948b82533ba98fd7cbb40432d6f1a9acbf85f5922d2f99a93ae6bb
        • MD5 SHA1 SHA512 TLSH

        LICENSE.APACHE

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\cryptography-50.0.1.dist-info\licenses\LICENSE.APACHE
        • Size 11KB
        • SHA256 aac73b3148f6d1d7111dbca32099f68d26c644c6813ae1e4f05f6579aa2663fe
        • MD5 SHA1 SHA512 SSDEEP TLSH

        LICENSE.BSD

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\cryptography-50.0.1.dist-info\licenses\LICENSE.BSD
        • Size 1KB
        • SHA256 602c4c7482de6479dd2e9793cda275e5e63d773dacd1eca689232ab7008fb4fb
        • MD5 SHA1 SHA512 TLSH

        cryptography-rust.cyclonedx.json

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\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\_MEI000010b42\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\_MEI000010b42\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\_MEI000010b42\libcrypto-3-x64.dll
        • Size 7.6MB
        • SHA256 4ef4f59ddc79f232a76e7eee7a7fd91792974ba885011b00acada8debfc14173
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libffi-8.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\libffi-8.dll
        • Size 27KB
        • SHA256 d56b5e5aa064e35f9ae5d11d2f0833a591d946bc04b85e1772ddfa7c84eb33a3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        libssl-3-x64.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\libssl-3-x64.dll
        • Size 1.5MB
        • SHA256 64e9d8e1627fbd3e683be652116c6f285982d573f5b772e5647f229cb293d597
        • MD5 SHA1 SHA512 SSDEEP TLSH

        pyexpat.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\pyexpat.pyd
        • Size 198KB
        • SHA256 2078cbd699c181466f3bd50e57e509842613ebfa82de6317beab6210d13b0a65
        • MD5 SHA1 SHA512 SSDEEP TLSH

        python3.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\python3.dll
        • Size 54KB
        • SHA256 8fda4948f6fc2bed1c7d1ece9596a3450c772775e48046c0bf701517d78ae9e3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        python311.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\python311.dll
        • Size 5.6MB
        • SHA256 06cb189016f6d5a593aba0e4c53ae972f2b7a257373c502e7da80f35f37dc1c0
        • MD5 SHA1 SHA512 SSDEEP TLSH

        select.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\select.pyd
        • Size 18KB
        • SHA256 ab91970ff8458849e59711e323dc49f09bafe7a650ddcf797fd7242343ebc49d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tcl86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\tcl86t.dll
        • Size 1.8MB
        • SHA256 59488f67a8e75a5d51c7cb865436b5581fbb16014e9233b34db0c22bea6d4765
        • MD5 SHA1 SHA512 SSDEEP TLSH

        platform-1.0.18.tm

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\tcl8\8.4\platform-1.0.18.tm
        • Size 11KB
        • SHA256 c96140d154c3bdc0a13a06c8b8b7628dfcd014df827704d1dbcb2b3b38349605
        • MD5 SHA1 SHA512 SSDEEP TLSH

        shell-1.1.4.tm

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\tcl8\8.4\platform\shell-1.1.4.tm
        • Size 6KB
        • SHA256 0a6b4b109cfdfc4b40fbdefdb2282f9b1af3cc2f9624dd39958eebd78781afb2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        msgcat-1.6.1.tm

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\tcl8\8.5\msgcat-1.6.1.tm
        • Size 34KB
        • SHA256 6774519f179872ec5292523f2788b77b2b839e15665037e097a0d4edddd1c6fb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tcltest-2.5.3.tm

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\tcl8\8.5\tcltest-2.5.3.tm
        • Size 104KB
        • SHA256 f6931f88ae2a4e63d77eec83e58f5944d66c7ef5f335a51064e8023e0c842971
        • MD5 SHA1 SHA512 SSDEEP TLSH

        http-2.9.5.tm

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\tcl8\8.6\http-2.9.5.tm
        • Size 112KB
        • SHA256 226347b0fae4a3ed9237ce64c998c2a88b4fdd3d7f85a081b7cab3e863feb13d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        tk86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\tk86t.dll
        • Size 1.5MB
        • SHA256 e9a5815ad39619e22d581b7124bbaa4192e701229956a2edbaffc0c420864561
        • MD5 SHA1 SHA512 SSDEEP TLSH

        unicodedata.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI000010b42\unicodedata.pyd
        • Size 1.1MB
        • SHA256 aa489115a8139de6aa0db51e2c8771c78df430fd7c3c65b714f385833ccc91fe
        • MD5 SHA1 SHA512 SSDEEP TLSH

        AddUnblock.mpa.locked

        • Path C:\Users\Admin\Downloads\AddUnblock.mpa.locked
        • Size 458KB
        • SHA256 d690e2e7fe321090dc408faf393415a4e84c9513115c101f20a05b15bb019b2e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        AssertOptimize.docx.locked

        • Path C:\Users\Admin\Downloads\AssertOptimize.docx.locked
        • Size 639KB
        • SHA256 d887f76b4f91bede1f2e2be6e45ff169d7e430ee09254235dc1114bfd565603b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        BlockPublish.xlsm.locked

        • Path C:\Users\Admin\Downloads\BlockPublish.xlsm.locked
        • Size 609KB
        • SHA256 c4c0f5093b2dfa11d62fcfeaa343b0d6d079458922cfa956c1b6e81c41774b29
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4968-999-0x000002B71CA70000-0x000002B71CA92000-memory.dmp