Analysis

  • user interaction
    yes
  • max time kernel
    53s
  • max time network
    111s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    10/08/2026, 23:42

General

  • Target
    BQTLock_Payload_20260811_023428.exe
  • Size 8.7MB
  • Sample260810-3p2bja1fjd
  • SHA256 8fbacedb88c87c8e7f6b51c14190c1a83bf92ffa19d0a15042128309087bbbc0
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Renames multiple (953) files with added filename extension

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

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

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

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • 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.

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 4 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • Modifies registry class 9 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BQTLock_Payload_20260811_023428.exe
    "C:\Users\Admin\AppData\Local\Temp\BQTLock_Payload_20260811_023428.exe"
    1⤵
    • Adds Run key to start application
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4460
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c netsh wlan show profiles 2>&1
      2⤵
      • Executes a command shell one-liner
      • System Network Configuration Discovery: Wi-Fi Discovery
      • Suspicious use of WriteProcessMemory
      PID:4676
      • C:\Windows\system32\netsh.exe
        netsh wlan show profiles
        3⤵
        • Event Triggered Execution: Netsh Helper DLL
        • System Network Configuration Discovery: Wi-Fi Discovery
        PID:2168
  • C:\Users\Admin\AppData\Local\Temp\BQTLock_Payload_20260811_023428.exe
    C:\Users\Admin\AppData\Local\Temp\BQTLock_Payload_20260811_023428.exe
    1⤵
    • Adds Run key to start application
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5592
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c netsh wlan show profiles 2>&1
      2⤵
      • Executes a command shell one-liner
      • System Network Configuration Discovery: Wi-Fi Discovery
      • Suspicious use of WriteProcessMemory
      PID:1520
      • C:\Windows\system32\netsh.exe
        netsh wlan show profiles
        3⤵
        • Event Triggered Execution: Netsh Helper DLL
        • System Network Configuration Discovery: Wi-Fi Discovery
        PID:3056

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        chrome.7z.tmp

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\chrome.7z.tmp
        • Size 408.1MB
        • SHA256 325eb736cbce46d0e0e1eb399ed571cc354d8eed2ef4bbb6e19e66f04c8e2240
        • MD5 SHA1 SHA512 SSDEEP TLSH

        R

        • Path C:\Program Files\dotnet\R
        • Size 307B
        • SHA256 8aa86d607537ad2ecdbb57704754d1be46d11cbd686fb97683a91165d9714907
        • MD5 SHA1 SHA512 TLSH

        223DE96EE265046957A660ED7C9DD9E7_EFF9B9BA98DEAA773F261FA85A0B1771

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\223DE96EE265046957A660ED7C9DD9E7_EFF9B9BA98DEAA773F261FA85A0B1771
        • Size 2KB
        • SHA256 e87bb0106931fc2b00695494e0208f870802313b0ba505f3e62344f209602861
        • MD5 SHA1 SHA512 TLSH

        DF2B6F1E6BCC61CEBCA21A02089A3B19_4F548F7827F125ACC54E53397A41333A

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\DF2B6F1E6BCC61CEBCA21A02089A3B19_4F548F7827F125ACC54E53397A41333A
        • Size 2KB
        • SHA256 36888dd390adfc1b3e610cc2b126e496d9dad1ada8c77a0b5ac8ed1a383c59d2
        • MD5 SHA1 SHA512 TLSH

        223DE96EE265046957A660ED7C9DD9E7_EFF9B9BA98DEAA773F261FA85A0B1771

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\223DE96EE265046957A660ED7C9DD9E7_EFF9B9BA98DEAA773F261FA85A0B1771
        • Size 450B
        • SHA256 5c8056d2eea69344ba3f8579c4cfb864b6b8949c749077229e09d54e15a43bf9
        • MD5 SHA1 SHA512 TLSH

        DF2B6F1E6BCC61CEBCA21A02089A3B19_4F548F7827F125ACC54E53397A41333A

        • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\DF2B6F1E6BCC61CEBCA21A02089A3B19_4F548F7827F125ACC54E53397A41333A
        • Size 474B
        • SHA256 13cc8ad87ccf5f168f3bb3e58ef6cebb0198e992d32a2aea45a57f73ed1491e4
        • MD5 SHA1 SHA512 TLSH

        bqt_passwords.txt

        • Path C:\Windows\Temp\bqt_passwords.txt
        • Size 149B
        • SHA256 9fbd1578be1b263171f410f3a5f204ea77f959e04d3c8f6baa2f6de3928ebb00
        • MD5 SHA1 SHA512 TLSH

        bqt_wallpaper.bmp

        • Path C:\Windows\Temp\bqt_wallpaper.bmp
        • Size 20B
        • SHA256 09d59144214919b7cb3385e789408ab2bdb77b291d052a97fb15cbe76e09b6a8
        • MD5 SHA1 SHA512

        memory/4460-2-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/4460-308-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/4460-2745-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/4460-3435-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/5592-2909-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/5592-4596-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/5592-6032-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/5592-8120-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/5592-11125-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp

        memory/5592-14433-0x00007FF7916F0000-0x00007FF791FA2000-memory.dmp