Analysis

  • max time kernel
    151s
  • 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
    25/09/2026, 22:38

General

  • Target
    InstallerV29412x64.exe
  • Size 15.8MB
  • Sample260925-2khg7aybnc
  • SHA256 e4eff0598023a539ffe527c32575c36e3357b5ef2a589a4b369eb1ab606ac67d
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: CNBackdoor

    CNBackdoor aka CNB Bot is a backdoor that polls its C2 to download and execute additional malware.

  • Enumerates VirtualBox registry keys 2 TTPs 4 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Looks for VMWare Tools registry key 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Creates a file in the Startup directory 1 TTPs 1 IoCs

    A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.

  • Executes a file named after a Windows system binary 1 TTPs 2 IoCs

    The file runs from a user directory while carrying the name of an executable that normally only exists in System32.

  • Executes dropped EXE 2 IoCs
  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

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

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 4 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 37 IoCs
  • Suspicious use of AdjustPrivilegeToken 47 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\InstallerV29412x64.exe
    "C:\Users\Admin\AppData\Local\Temp\InstallerV29412x64.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2168
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -WindowStyle Hidden -Command "Add-MpPreference -ExclusionPath @('C:\Users\Admin\AppData\Local\Temp\','C:\Users\Admin\AppData\Local\Temp\InstallerV29412x64.exe','C:\Users\Admin\AppData\Local','C:\Users\Admin\AppData\Roaming','C:\Users\Admin\AppData\Local','C:\Users\Admin\AppData\Roaming','RuntimeBroker.exe','AppLaunch.exe','dwm.exe','svchost.exe','explorer.exe','services.exe','schtasks.exe','conhost.exe'); Add-MpPreference -ExclusionProcess @('C:\Users\Admin\AppData\Local\Temp\InstallerV29412x64.exe','RuntimeBroker.exe','InstallUtil.exe','AppLaunch.exe','dwm.exe','svchost.exe','explorer.exe','services.exe','schtasks.exe','conhost.exe','wscript.exe','concheck.exe','pathmsil.exe','ioextender.exe','TimerSourceChecker.exe')"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Enumerates connected drives
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1684
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -WindowStyle Hidden Start-Process 'C:\Users\Admin\AppData\Local\Temp\\TimerSourceChecker.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Enumerates connected drives
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2096
      • C:\Users\Admin\AppData\Local\Temp\TimerSourceChecker.exe
        "C:\Users\Admin\AppData\Local\Temp\TimerSourceChecker.exe"
        3⤵
        • Enumerates VirtualBox registry keys
        • Looks for VirtualBox Guest Additions in registry
        • Looks for VMWare Tools registry key
        • Creates a file in the Startup directory
        • Executes a file named after a Windows system binary
        • Executes dropped EXE
        • Reads the TCP/IP host and domain name from the registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3088
        • C:\Users\Admin\AppData\Roaming\GalleryDrive\N0039\services.exe
          "C:\Users\Admin\AppData\Roaming\GalleryDrive\N0039\services.exe"
          4⤵
          • Enumerates VirtualBox registry keys
          • Looks for VirtualBox Guest Additions in registry
          • Looks for VMWare Tools registry key
          • Executes a file named after a Windows system binary
          • Executes dropped EXE
          • Reads the TCP/IP host and domain name from the registry
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5772
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\qccj27i0.bat""
          4⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:2064
          • C:\Windows\system32\timeout.exe
            timeout /t 3 /nobreak
            5⤵
            • Delays execution with timeout.exe
            PID:1112

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 1KB
        • SHA256 070e2dc002fee5d6c6ae0611713bb24a9f01d741d964e7f1ece4f61789724a94
        • MD5 SHA1 SHA512 TLSH

        TimerSourceChecker.exe

        • Path C:\Users\Admin\AppData\Local\Temp\TimerSourceChecker.exe
        • Size 544KB
        • SHA256 b0feb3b7403ffd4d025d180b5f1c671b3fad8a0547acaf9ac3c781ec807118da
        • MD5 SHA1 SHA512 SSDEEP TLSH

        __PSScriptPolicyTest_m34ptdno.px3.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m34ptdno.px3.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512 TLSH

        qccj27i0.bat

        • Path C:\Users\Admin\AppData\Local\Temp\qccj27i0.bat
        • Size 220B
        • SHA256 90b154264c6a0a6d32647036c77ab91c21045b9e25aa51699a0a7cb5f570d0b2
        • MD5 SHA1 SHA512 TLSH

        install.dat

        • Path C:\Users\Admin\AppData\Roaming\GalleryDrive\N0039\install.dat
        • Size 62B
        • SHA256 70f094f451c5fd9f987c5f591be1538e49ec0dfd2ead6f30524e30e358009eb1
        • MD5 SHA1 SHA512 TLSH

        memory/1684-28-0x00000223E15F0000-0x00000223E15FA000-memory.dmp

        memory/1684-58-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-30-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-22-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-27-0x00000223E1620000-0x00000223E16D2000-memory.dmp

        memory/1684-26-0x00000223E1600000-0x00000223E161E000-memory.dmp

        memory/1684-15-0x00000223C9430000-0x00000223C9452000-memory.dmp

        memory/1684-23-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-17-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-18-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-19-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-20-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/1684-21-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-12-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-2-0x00007FFF80030000-0x00007FFF80031000-memory.dmp

        memory/2168-0-0x0000000000400000-0x0000000001BD8000-memory.dmp

        memory/2168-11-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-10-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-9-0x0000000000400000-0x0000000001BD8000-memory.dmp

        memory/2168-32-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-33-0x000000001F3F0000-0x000000001FEC2000-memory.dmp

        memory/2168-8-0x0000000000400000-0x0000000001BD8000-memory.dmp

        memory/2168-7-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-6-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-61-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-60-0x0000000000400000-0x0000000001BD8000-memory.dmp

        memory/2168-1-0x00007FFF80000000-0x00007FFF80002000-memory.dmp

        memory/2168-57-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-5-0x00007FFF6C81F000-0x00007FFF6C820000-memory.dmp

        memory/2168-16-0x00007FFF6C690000-0x00007FFF6D034000-memory.dmp

        memory/2168-56-0x0000000000400000-0x0000000001BD8000-memory.dmp

        memory/3088-48-0x000002071AD00000-0x000002071AD1E000-memory.dmp

        memory/3088-46-0x0000020735050000-0x00000207350C6000-memory.dmp

        memory/3088-43-0x000002071AC70000-0x000002071ACC4000-memory.dmp

        memory/3088-41-0x000002071A6E0000-0x000002071A76C000-memory.dmp