Analysis

  • user interaction
    yes
  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    19/08/2026, 17:17

General

  • Target
    WinLock.exe
  • Size 196KB
  • Sample260819-vt1a2ayfre
  • SHA256 8a5b33f6eb04626cc82b922a2b91c389c6314e7ca3a144b3bd08f17ae170f931
  • 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
  • Hide Artifacts: Hidden Files and Directories 1 TTPs 12 IoCs
  • 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
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4908
    • 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: @@lockervikup_bot 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      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⤵
        • Views/modifies file attributes
        PID:4272
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:4396
    • 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: @@lockervikup_bot 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:4176
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:864
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:1216
    • 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: @@lockervikup_bot 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:1572
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:2032
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:1084
    • 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: @@lockervikup_bot 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:800
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:724
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:2228
    • 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: @@lockervikup_bot 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:2924
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:5032
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:5016
    • 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: @@lockervikup_bot 1>info-Locker.txt & attrib -h +s +r info-Locker.txt
      2⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:676
      • C:\Windows\system32\attrib.exe
        attrib +h +s +r +i /D
        3⤵
        • Views/modifies file attributes
        PID:5044
      • C:\Windows\system32\attrib.exe
        attrib -h +s +r info-Locker.txt
        3⤵
        • Views/modifies file attributes
        PID:3672
    • C:\Windows\SYSTEM32\taskkill.exe
      taskkill.exe /im Explorer.exe /f
      2⤵
      • Kills process with taskkill
      • Suspicious use of AdjustPrivilegeToken
      PID:4788
    • 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⤵
      • Hide Artifacts: Hidden Files and Directories
      • Suspicious use of WriteProcessMemory
      PID:2456
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Views/modifies file attributes
        PID:3712
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Views/modifies file attributes
        PID:3780
    • 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:3340
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:556
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:1216
    • 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:2832
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:4580
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:3908
    • 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:3812
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:1948
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:4244
    • 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:3224
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:3400
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Drops desktop.ini file(s)
        • Views/modifies file attributes
        PID:1812
    • 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:1388
      • C:\Windows\system32\attrib.exe
        attrib -h -s -r -i /D
        3⤵
        • Views/modifies file attributes
        PID:816
      • C:\Windows\system32\attrib.exe
        attrib +h +s -r desktop.ini
        3⤵
        • Views/modifies file attributes
        PID:3464
  • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
    "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" --wininit
    1⤵
      PID:3356
    • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
      "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" /setup
      1⤵
        PID:3236
      • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
        "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" -startup
        1⤵
          PID:5100
        • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
          "C:\Users\Admin\AppData\Local\Temp\WinLock.exe" --init
          1⤵
            PID:2704
          • C:\Users\Admin\AppData\Local\Temp\WinLock.exe
            "C:\Users\Admin\AppData\Local\Temp\WinLock.exe"
            1⤵
              PID:556

            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\Desktop\info-Locker.txt
                  • Size 82B
                  • SHA256 f70e49b46b2fff2d8ebd8fd87c5acd890190c8d079d6dcf300479ca831a8f38f
                  • MD5 SHA1 SHA512 TLSH

                  info-Locker.txt

                  • Path C:\Users\Admin\Downloads\info-Locker.txt
                  • Size 82B
                  • SHA256 6a9887a5439bb5741efd74b1a80bab6b2fa593ba6cf07a152372e9bbebf72fba
                  • MD5 SHA1 SHA512 TLSH

                  memory/4908-0-0x0000000000CC0000-0x0000000000CF8000-memory.dmp

                  memory/4908-1-0x000000001B860000-0x000000001B870000-memory.dmp

                  memory/4908-19-0x000000001B860000-0x000000001B870000-memory.dmp